阅读说明：本技术 一种牙科用根管内折断器械的锚取工具 (Anchor of rupture apparatus gets instrument in root canal for dentistry ) 是由 侯本祥 于 2021-02-03 设计创作，主要内容包括：一种牙科用根管内折断器械的锚取工具,由锚定内管1和外锁套筒2组成锚取套筒,锚定内管1的前端设有锚定笼,末端与连接件4相连,被固定于弯曲的引管5末端,并处于外锁套筒2内,其外径与此外锁套筒2的内径配合,使之能套在锚定内管1上、并可滑动一段距离,连接件4也连接保护盖3,外锁套筒2的滑动受一弹簧钢丝12的弹力作用,此钢丝12穿过引管5固定于手柄7内的滑块13里并被里面一紧固螺丝14所夹紧,在手柄7内的导槽7g里的这个滑块13上设有一段螺丝,其上连接有位于手柄7外的推钮10,本发明结构简单、尺寸纤细、用法简便,易于对牙齿根管内残留的根管内折断器械在取出过程中进行观察、锚定,从而精准、微创地将其取出。(An anchoring tool for a dental root canal internal fracture instrument comprises an anchoring sleeve composed of an anchoring inner tube 1 and an outer locking sleeve 2, wherein the front end of the anchoring inner tube 1 is provided with an anchoring cage, the tail end of the anchoring inner tube is connected with a connecting piece 4, the anchoring inner tube is fixed at the tail end of a bent guide tube 5 and is positioned in the outer locking sleeve 2, the outer diameter of the anchoring inner tube is matched with the inner diameter of the outer locking sleeve 2 so as to be sleeved on the anchoring inner tube 1 and can slide for a certain distance, the connecting piece 4 is also connected with a protective cover 3, the sliding of the outer locking sleeve 2 is under the elastic action of a spring steel wire 12, the steel wire 12 passes through the guide tube 5 and is fixed in a slide block 13 in a handle 7 and is clamped by a fastening screw 14 inside, the slide block 13 in a guide groove 7g in the handle 7 is provided with a section of screw, and is connected with a push button 10 positioned outside the handle 7 Anchoring, thereby accurately and minimally invasively taking out the artificial bone.)

1. An anchoring tool for a dental root canal internal fracture instrument is characterized in that an anchoring sleeve is composed of an anchoring inner tube (1) and an outer locking sleeve (2), a grid-shaped anchoring cage (1a) is arranged at one end of the anchoring inner tube (1), the other end of the anchoring inner tube is combined and fixed with a connecting piece (4) with an opposite hole, the connecting piece (4) is combined with a bent guide tube (5), the outer diameter of the anchoring inner tube (1) is just matched with the inner diameter of the outer locking sleeve (2) and can slide, the outer locking sleeve (2) is combined with a connecting fork (11), the connecting fork (11) is combined with a spring steel wire (12), the spring steel wire (12) penetrates through the bent guide tube (5) and then enters a handle body (7) and then enters a sliding block (13) and is fixed in the sliding block (13) by a fastening screw (14), and a section of screw (13e) is arranged on the sliding block (13), to connect the push button (10), the left end of the handle body (7) is connected with an end cover (6), the middle is sleeved with a cylinder (8), and the right end is provided with a tail cover (9).

2. The anchoring tool for a dental endodontic fracture instrument according to claim 1, wherein the anchoring inner tube (1) is provided at its distal end with 2 to 4 rectangular windows (1d) having long sides along the axial direction of the tube and short sides along the circumferential direction, thereby forming 2 to 4 longitudinal cage bars (1c) and a lower top ring (1b) and constituting the grid-like anchoring cage (1a), i.e., the cage bars and the top ring are themselves a part of the tube, and the other end of the anchoring inner tube (1) is fixed to each other in combination with the connecting member (4).

3. The anchoring tool for the dental endodontic fracture instrument according to claim 1 and claim 2, wherein said connecting member (4) is cylindrical in shape, has a circular flange (4a) in the middle, has a smooth cylindrical body (4d) at the upper thin portion and a screw thread (4e) at the lower thin portion, has a circular hole (4c) inside, and has a diaphragm (4b) with a shaped through hole (4f) at the center at the approximate middle of the hole, said shaped through hole (4f) is symmetrical in two orthogonal directions and consists of 4 circular arcs and 4 straight lines, i.e., two symmetrical concentric small circular arcs (4g), two symmetrical concentric large circular arcs (4h), and 4 straight lines (4i), which are concentric, and the 4 straight lines are located on the radius of the circular arcs, and they constitute an opposite hole consisting of a central circular hole and two symmetrical fan-shaped holes on both sides thereof, the central circular hole and the two fan-shaped holes are communicated, meanwhile, the diameter of the small circular arc (4g) is consistent with the outer diameter of the anchoring inner pipe (1), and the diameter of the large circular arc (4h) is consistent with the outer diameter of the connecting fork (11).

4. A dental endodontic breaking instrument anchoring tool according to claim 1, wherein the upper end of the outer locking sleeve (2) is combined with a connection fork (11) to be fixed to each other, the connection fork (11) has a tubular shape having two through slots formed therein so as to form two symmetrical branches (11c), that is, the two branches are themselves a part of the tube and have an inner circular hole surface (11d), the lower circular ring (11a) of the connection fork (11) is fitted over the upper end of the outer locking sleeve (2), and the branch bottom surfaces (11b) thereof are flush with the upper end surface of the outer locking sleeve (2), and the spring wire (12) is inserted into the inner circular hole surface (11d) of the upper end of the connection fork (11) at a certain distance and combined therewith to be fixed to each other.

5. A dental endodontic snapping instrument anchoring tool as claimed in claim 1, claim 2, claim 3 and claim 4, wherein said inner anchoring tube assembly consisting of said inner anchoring tube (1) and said connecting member (4) in combination, and said outer locking sleeve assembly consisting of said outer locking sleeve (2), said prongs (11) and said spring wire (12) in combination, are nested one inside the other to form an anchoring sleeve sliding mechanism, i.e. said outer locking sleeve (2) is fitted over said inner anchoring tube (1), and said prongs (11c) of said prongs (11) are passed through symmetrical sector-shaped through-holes of said opposite holes (4f) in said connecting member (4) so as to be slidable one up and down therein for a distance, i.e. said prongs (11) can bring said outer locking sleeve (2) to move over said inner anchoring tube (1), and said spring wire (12) coupled to said prongs (11) can be pushed and pulled to manipulate this sliding action, the spring steel wire (12) finally reaches the small hole (13g) of the sliding block (13) and is clamped by the fastening screw (14).

6. The dental endodontic snapping apparatus anchoring tool as claimed in claim 1, wherein said bent lead pipe (5) is provided at a left end thereof with a flange (5a), a flange gap (5b), a flange bottom surface (5c) and a through hole (5d) are arranged on the flange, and a combining concave (5e) is arranged at the other end, a flange (5a) of the bending guide pipe (5) is combined with a round concave surface (7i) at the left end of the handle body (7), therefore, the flange bottom surface (5c) of the bending guide pipe (5) is closely combined with the circular concave surface (7i) at the left end of the handle body (7), meanwhile, the flange gap (5b) of the former is matched with the round pin (7j) of the latter in a contraposition way, thus, the spring wire (12) enters the left end small hole (7h) of the handle body (7) through the through hole (5d) of the bending guide tube (5).

7. The anchoring tool for the dental endodontic fracture instrument according to claims 1 and 6, wherein the handle body (7) has a cylindrical shape, left and right ends thereof are respectively provided with left and right external threads (7a, 7e), a middle section thereof is provided with a cylinder (7d), a handle flange (7b) is provided near the left end, a push button plane (7c) is provided on the front surface thereof, a guide groove (7g) and an assembly groove (7f) are provided below the push button plane, the three are of a vertically symmetrical structure, narrow guide grooves (7k) are provided on upper and lower inner walls of the guide groove (7g) to be in conformity with and fit with a square protrusion (13b) on the slider (13), a circular concave surface (7i) is provided at the left end thereof, a small hole (7h) is provided at the center thereof, a circular pin (7j) is provided at the top thereof, the circular concave surface (7i) and the circular pin (7j) thereof are in close fit with a flange (5a) of the bent guide tube (5), finally, the end cover (6) presses and fixes the end cover.

8. A dental endodontic breaking instrument anchoring tool as set forth in claim 1 and claim 7, wherein said slider (13) is composed of a rectangular parallelepiped (13a) and a cylindrical body (13d), square protrusions (13b) are symmetrically provided on upper and lower surfaces of the rectangular parallelepiped (13a), a small hole (13g) is provided on a left end surface thereof, and a right end surface thereof is provided with a right end hole (13c), the small hole (13g) and the right end hole (13c) are penetrated inside, and the penetrating position is provided inside a right side of the cylindrical body (13d), and the upper and lower square protrusions (13b) have a size corresponding to and fit with upper and lower narrow guide grooves (7k) of the guide groove (7g) of the handle body (7), so that the slider (13) can slide a distance to the left in the guide groove of the handle body (7), and the outer surface of the cylindrical body (13d) is provided with an external thread, i.e., a push button thread (13f) to fit with an internal thread of the push button (10), a threaded hole (13e) is also provided in the center of the cylindrical body (13d), the internal thread of which is fitted with a fastening screw (14).

9. The anchoring tool for the dental endodontic snap instrument according to claim 1, wherein the female screw of the cap (6) is engaged with the male screw (7a) of the left end of the handle body (7) to press and fix the flange (5a) of the bent lead tube (5), the sleeve (8) is fitted over the handle body (7) to abut against the right end of the handle flange (7b), and the female screw of the tail cap (9) is engaged with the male screw (7e) of the right end of the handle body (7) to abut against the right end of the sleeve (8), so that the distance, i.e., stroke, by which the slider can slide right and left is determined by the axial width of the handle flange (7b) of the handle body (7).

Technical Field

An anchoring tool for a dental root canal internal fracture instrument relates to the field of medical instruments in the oral medicine and endodontics branch technology.

Background

Root canal therapy is the first treatment for endodontic and periapical diseases, and is also the most effective treatment, and one of the most used treatments in oral medicine. The root canal therapy is to remove the infectious substances in the root canal by mechanical and chemical means, dredge the root canal and tightly fill the root canal, thereby achieving the purpose of preventing periapical lesions or treating lesions. Mechanical removal of infection from the root canal and creation of a filling path, metal-based root canal instruments, most of which are root canal files, are used to enlarge the root canal and remove infected, necrotic pulp tissue.

Although elastic, files are limited in strength due to their metallic nature, and the instruments break beyond their strength limits when subjected to large torsional forces or repeated bending stresses. When the root of tooth is crooked, the root canal file can be followed the root canal and crooked after being inserted into the root canal, because constantly rotatory, the root canal file can take place the fatigue rupture, when meetting great resistance, also can take place to be twisted in the twinkling of an eye and break. The broken instrument remained in the root canal of the tooth can cause that the infected substance in the root canal can not be cleaned and the root canal can not be dredged, thereby causing the failure of the root canal therapy, which is the most common complication of the root canal therapy and the most troublesome complication of doctors. The broken appliance, if it exceeds the apical foramen of the teeth, may also cause other injuries, such as damage to the underlying alveolar nerve, resulting in facial numbness. In addition to root canal files, metal instruments used in root canal treatment, such as broach, lateral press, auger, and vertical press, are often broken. According to the prior art, the occurrence rate of the breakage of the root canal treatment instrument is 0.5 to 14%. After the root canal apparatus is broken, the operation space and the visual field are limited, and the removal is very difficult, so the root canal apparatus is also the most common reason of doctor-patient disputes in clinic.

Since 1728 French doctor Pierre Fauchard discovered that each tooth of people has dental pulp, people in later years have more profound understanding of dental pulp diseases, the method of clearing infected and necrotic dental pulp and filling and sealing root canals is a good method for keeping teeth, American dentist Edwin Maynard made the first root canal file in the world in 1838, and the root canal file was made by using a watch spring, and a new era of root canal therapy began.

At present, the root canal file has been developed to a stage with a higher standardization degree, and different series of products are formed to meet different requirements, and since the last 90 century, the root canal treatment is relatively easy after the introduction of nickel-titanium alloy materials in the root canal file industry, and the breakage of the high-elasticity nickel-titanium alloy in the treatment is reduced, however, the root canal file made of steel or nickel-titanium alloy has limited strength and can be broken when being overloaded, so that the problem that the taking out of the broken instrument (commonly called as a broken needle) in the root canal is a long-term problem to be faced.

Methods for extracting endodontic instruments are broadly divided into two categories, the first category being that of existing or common dental equipment and tools used to effect the removal of the stump, such as ultrasound, dental surgical tools, root canal tools (including other root canal files), irrigation and aspiration equipment and tools, and the like; the second type is to use a special tool to take out the broken instrument in the root canal left in the root canal.

The first method is implemented by means of the clever intelligence and experience of a doctor and by means of various available devices and tools, the breaking instrument is taken out step by step, and the breaking instrument can be displayed only by taking a small hole for the next time, but is not easy as taking a cyst, requires time and effort, and sometimes needs to be repeatedly tried.

For the second method, the popular practical special tools in the domestic and foreign dental field are mainly of three types, namely "sleeve-awl" tools, Lasso (Lasso) tools and micro-pliers (micro-forces) tools.

For the sleeve-awl tool, the method is that a sleeve is used for covering the head of the stub, an awl is inserted into the sleeve, the awl point can be squeezed into the sleeve from the side of the head of the stub (namely, between the sleeve wall and the head of the stub), the stub is clamped (namely, the awl is squeezed to press the awl) so as to be drawn out of the root canal, and the head of the awl can be provided with threads so as to be matched with the threads on the stub to be pushed out when the awl is rotated.

Such "sleeve-awl" tools, for example, the FRS endodontic fracture instrument anchor tool available from the tunsa Dental Specialties company under the flag of dentl, by the american well-known Dental specialist Ruddle, were invented by a sleeve to cover the endodontic fracture instrument head, and then an awl was inserted into the sleeve to screw in the awl and press the point of the awl sideways into the stump head inside the sleeve to clamp the stump and remove it, the awl head also being threaded, the sleeve and awl being of different sizes to fit each other, so that both were used simultaneously, of course, before removal of the hand had to be performed, some preparation of the canal, for example, to enlarge the passage and expose the stump head, etc.; in addition to the product of Dentsply, there is the ERS tool from Cerkamed Medical, Poland, also a "cannula-awl" system, whose point of awl is much sharper and like a sewing needle, which has integrated the sleeve and awl together into one piece, as compared to the tool of Dentsply; there are also domestic applications where such utility products are used, for example, in the endodontic instrument extraction kit available from the Beijing Focus company, which includes such a "sleeve-awl" extraction tool in a manner similar to that of Dentsply, which is in two pieces.

Lasso/Lasso extraction systems utilize a micro-Lasso that is first sheathed over the head of a fractured instrument in the root canal, then tightened to firmly sheath it, and finally extracted from the root canal, e.g., Koehrer Medical Engineering, germanyBrand snapping instrument extraction tools, also the snapping instrument extraction tool kit, brand Terauchi, japan, which contains the lasso tool Yoshi Loop, created by doctor yoshitsutsuugu Terauchi, a well known dental specialist, japan; as another example, the Polish Cerkamed Medical, supra, also provides a similar lasso retrieval tool.

For a micro-pliers/micro-forceps extraction tool, such as the endodontic file stump extraction KIT ENDO ERS KIT available from uk dentures Ltd, u.k., the present invention comprises a micro-pliers extraction tool for grasping the stump head by means of a micro-pliers and then removing it from the canal, the grasping action of which is in accordance with the collet chuck principle commonly used in the industry, the micro-pliers of this tool being of the three-jaw type, i.e. having three jaws which are simultaneously retracted inwardly during grasping to close the jaws so as to "grasp" the stump head.

These break instrument extraction tools all have significant drawbacks and problems, the two-piece "sleeve-awl" tool of Dentsply requires two tools to be used simultaneously, which increases the physician's labor intensity, and in addition, the sleeve and awl's handle can obscure the view, which alleviates the problem of obscuring the view for the integral "sleeve-awl" tool, but the problem still exists; the process of extracting the noose tool needs patience and experience, and when large resistance is met, namely when the bending degree of the root canal is large, the bending part is narrow and the stub is long, the extraction resistance is large, the noose can be pulled off; for the micro-clamp tool, due to the problem of the clamping angle (the contact angle between the clamping jaw and the clamped object) and the structural limitation of the chuck, the clamping force is small, and the residual section is easy to slip off when the micro-clamp tool is taken out.

In addition to this, other methods and tools for extracting fractured endodontic instruments have historically been proposed, such as magnetic attraction, which are limited in their clinical use to some stainless steel instruments or to instruments that are too weak to extract the resistive root canal.

Disclosure of Invention

In order to achieve the anchoring of the dental internal root canal fracture instrument and overcome the problems in the background technology, the invention provides a new technical scheme, and designs a dental internal root canal fracture instrument anchoring tool which utilizes an anchoring inner tube and an external locking sleeve to capture the internal root canal fracture instrument in the root canal, wherein the head of the anchoring inner tube is provided with a grid-shaped anchoring cage and a top ring, the observation can be carried out from different angles through a window of the grid-shaped anchoring cage and a center hole of the top ring, under a microscope, a doctor can more easily see the fracture end of the instrument and judge the position of the fracture end of the instrument, and then the anchoring cage is sleeved at the fracture end of the instrument to carry out anchoring, so that the problem that the doctor often encounters the embarrassment situation that the doctor cannot see the fracture end and cannot see the fracture end in the taking-out process is solved, and the fracture instrument is easier to capture and more minimally invasive. At the same time, the anchoring cage can provide sufficient strength so that the instrument extraction operation cannot be failed due to insufficient clamping strength. The invention has simple structure, fine size and simple and convenient use, and is easy to observe and anchor the residual root canal internal fracture instruments in the tooth root canal, thereby being minimally invasive, safe and fast to take out.

In order to achieve the above purpose, the invention provides a scheme that: the design is that an anchoring sleeve is composed of an anchoring inner tube and an outer locking sleeve, one end of the anchoring inner tube is provided with a grid-shaped anchoring cage, the other end of the anchoring inner tube is combined with a connecting piece with an opposite-shaped hole and fixed together, the connecting piece is combined with a bent guide tube, the outer diameter of the anchoring inner tube is just matched with the inner diameter of the outer locking sleeve, so that the outer locking sleeve can be sleeved on the anchoring inner tube and can slide, the outer locking sleeve is combined with a connecting fork, the connecting fork is combined with a spring steel wire, the spring steel wire penetrates through the bent guide tube and then enters a handle body, then enters a sliding block and is fixed in the sliding block by a fastening screw, a section of screw is arranged on the sliding block to connect a push button, the left end of the handle body is connected with an end cover, the middle.

The tail end of the anchoring inner pipe is provided with 2-4 rectangular windows, the long side of each rectangular window is along the axial direction of the pipe, the short side of each rectangular window is along the circumferential direction, 2-4 longitudinal cage bars and lower top rings are formed, the cage bars and the top rings form a grid-shaped anchoring cage, namely, the cage bars and the top rings are part of the pipe, and the other end of the anchoring inner pipe is combined with a connecting piece to be fixed together.

The connecting piece is cylindrical, the middle part is provided with a ring flange, the upper thin part is a smooth cylinder, the lower thin part is provided with threads, the inside is provided with a round hole, and simultaneously, a transverse clapboard is arranged at the approximate middle position of the hole, an opposite through hole is arranged at the center of the transverse clapboard, the special-shaped through hole is of a structure with two symmetrical orthogonal directions and consists of 4 sections of circular arcs and 4 sections of straight lines, namely two symmetrical concentric small arcs, two symmetrical concentric large arcs and 4 straight lines, wherein the two large arcs and the two small arcs are also concentric, the 4 straight lines are positioned on the radius of the circle where the circular arcs are positioned, and the circular arcs form an opposite hole which is formed by a central circular hole and fan-shaped holes which are symmetrical on two sides of the central circular hole, the central circular hole and the two fan-shaped holes are communicated, meanwhile, the diameter of the small arc is consistent with the outer diameter of the anchoring inner pipe, and the diameter of the large arc is consistent with the outer diameter of the connecting fork.

The upper end of the outer lock sleeve is combined with and fixed to a yoke, the yoke has a tubular shape, and two through grooves are formed in the yoke so as to form two symmetrical branches, i.e., the two branches are part of a tube and have inner circular hole surfaces, the lower circular ring of the yoke is sleeved on the upper end of the outer lock sleeve, the bottom surfaces of the branches are flush with the upper end surface of the outer lock sleeve, and simultaneously, spring steel wires are inserted into the inner circular hole surfaces of the upper ends of the yoke for a certain distance and combined with the inner circular hole surfaces to be fixed to each other.

The outer locking sleeve is sleeved on the anchoring inner tube, and the branches of the connecting fork penetrate through symmetrical fan-shaped through hole regions of the opposite holes in the connecting piece, so that the outer locking sleeve can slide up and down for a certain distance, namely the connecting fork can drive the outer locking sleeve to move on the anchoring inner tube, and the spring steel wire combined with the connecting fork can push and pull the sliding action.

The left end of the bending guide pipe is provided with a flange, a flange notch, a flange bottom surface and a through hole, the other end of the bending guide pipe is provided with a combining concave, and the flange of the bending guide pipe is combined with the circular concave at the left end of the handle body, so that the flange bottom surface of the bending guide pipe is closely attached to and combined with the circular concave at the left end of the handle body, meanwhile, the flange notch of the bending guide pipe is in contraposition fit with the circular pin of the handle body, and therefore, the spring steel wire enters the small hole at the left end of the handle body through the through hole of the bending guide pipe.

The handle body appearance is cylindricly, its left end and right-hand member are equipped with left external screw thread and right external screw thread respectively, the interlude is equipped with the cylinder, be equipped with the handle flange near left end department, be equipped with in the front and push away the button plane, it has guide slot and assembly groove to push away the button plane here, it is the longitudinal symmetry structure to push away the button plane, guide slot and assembly groove are, and still be equipped with the narrow guide rail groove of symmetry on the inner wall about the guide slot, this narrow guide rail groove is unanimous with the square bead size on the slider and mutually supports, the left end still is equipped with circular concave surface, its center is equipped with the aperture and the top is equipped with circular round pin, circular concave surface and circular round.

The slider comprises a cuboid and a cylinder, be equipped with the square bead on its cuboid upper and lower face symmetrically, be equipped with the aperture on its left end face, and be equipped with the right-hand member hole on the right-hand member face, aperture and right-hand member hole run through in inside, the position of running through is inside the right side of cylinder, the size of upper and lower square bead is unanimous with the upper and lower narrow guide rail groove of handle body guide slot and mutually supports, consequently, this slider can slide one section distance from side to side in the guide slot of handle body, and the surface of cylinder is equipped with the external screw thread and pushes away the button screw thread promptly, this pushes away the button screw thread and mutually supports with the internal thread that pushes away the button, the center of this cylinder still is equipped with.

The inner thread of the end cover is matched with the outer thread at the left end of the handle body to press and fix the flange of the bent guide pipe, the sleeve is sleeved on the handle body and abuts against the right end of the handle flange, and the inner thread of the tail cover is matched with the outer thread at the right end of the handle body until abutting against the right end of the sleeve, so that the distance, namely the stroke, of the slide block capable of sliding left and right is determined by the axial width of the handle flange of the handle body.

The handle of the invention consists of the handle end cover, the handle body, the cylinder, the tail cover, the push button, the slide block and the fastening screw. Thus, when the push button is pushed forward, i.e. in the direction of the handle end cap, the outer locking sleeve is lowered to enclose the anchoring cage, thereby capturing the head of the fractured instrument in the root canal, and then in application, the tool of the present invention can be carefully lifted out of the root canal until the stump is completely removed, and finally the removed stump is removed from the tool.

Drawings

Corresponding reference numerals in the drawings are: 1. the device comprises an anchoring inner pipe, a 1a anchoring cage, a 1b top ring, a 1c cage bar, a 1cc. thickened cage bar with an inner groove, a 1d window, a 2 outer locking sleeve, a 3 protective cover, a 4 connecting piece, a 4a ring flange, a 4b transverse clapboard, a 4c round hole, a 4d smooth cylinder, a 4e thread, a 4f special-shaped through hole, a 4g small circular arc, a 4h large circular arc, a 4i straight line, a 5 bent guide pipe, a 5a flange, a 5b flange gap, a 5c flange bottom surface, a 5d through hole, a 5e combining concave, a 6 end cover, a 7 handle body, a 7a left outer thread, a 7b handle flange, a 7c push button plane, a 7d cylinder, a 7e right outer thread, a 7f assembly groove, a 7g guide groove, a 7gg. circular arc cavity, a 7h concave hole, a 7i circular pin, a 7j circular pin, a 7k narrow guide rail groove, a 8 k narrow guide rail groove, a 9, a 7e tail guide rail cover, a 10 tail fork connection fork and a fork connection fork, 11a, a lower ring, 11b, a forked bottom surface, 11c, a forked end, 11d, an inner circular hole surface, 12, a steel wire, 13, a sliding block, 13a, a cuboid, 13b, a rib, 13c, a right end hole, 13d, a cylinder, 13e, a threaded hole, 13f, a push button thread, 13g, a small hole, 14, a fastening screw and 15, a supporting tube.

FIG. 1 is a 3D overview of the outline of the present invention;

FIG. 2 is a 3D block diagram of the grid-like anchor cage (1a) of the present invention;

FIG. 3 is a 3D schematic view of the anchoring sleeve assembly of the present invention consisting of the anchoring inner tube (1) and the outer locking sleeve (2);

FIG. 4 is a 3D enlarged schematic view of the anchoring sleeve head of the present invention;

FIG. 5 is a 3D schematic view of the anchoring inner tube assembly of the present invention;

FIG. 6 is a 3D schematic view of the anchoring inner tube assembly of the present invention, including a connector cut-away;

FIG. 7 is an enlarged 3D view of the connector of the present invention;

FIG. 8 is a second enlarged 3D schematic view of the connector of the present invention;

FIG. 9 is an enlarged top plan view of the connector of the present invention;

FIG. 10 is an enlarged longitudinal full sectional plan view of the connector of the present invention;

FIG. 11 is a 3D schematic view of the external locking sleeve assembly of the present invention, not including the wire;

FIG. 12 is a 3D schematic view of a clevis and outer lock sleeve assembly of the present invention;

FIG. 13 is a 3D schematic view of the anchoring inner tube assembly of the present invention in its inserted state into the outer lock sleeve assembly, noting the state of only a small insertion;

FIG. 14 is a 3D schematic view of the present invention in a state wherein the inner anchoring tube assembly is fully inserted into the outer lock sleeve assembly, noting that it has been inserted into position/terminus;

FIG. 15 is a 3D schematic view of the present invention after bonding the wire link to the clevis;

FIG. 16 is a 3D schematic view of a bent lead of the present invention;

FIG. 17 is a schematic plan view of a bent lead tube according to the present invention, with a partial cut-away;

FIG. 18 is an exploded 3D view of the handle of the present invention;

FIG. 19 is a front plan view of the handle body of the present invention;

FIG. 20 is a 3D schematic view of a handle body according to the present invention;

FIG. 21 is a 3D schematic view of a slider according to the present invention;

fig. 22 is a 3D schematic view of the slider in full section in the present invention.

FIG. 23 is a cross-sectional view of the outer lock sleeve, clevis and wire of the present invention taken in diameter;

FIG. 24 is a sectional view of the steel wire-added support tube at the left end of the slider in the present invention;

FIG. 25 is a schematic view of a grooved thickened cage bar according to the present invention (4-window anchor cage);

FIG. 26 is a schematic view of the grooved thickened cage bar of the present invention with the outer lock sleeve lowered.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

The invention provides an anchoring tool of a dental endodontic fracture instrument, which is combined with the accompanying drawings, and the preferred embodiment of the anchoring tool is as follows: an anchoring sleeve is composed of an anchoring inner tube (1) and an outer locking sleeve (2), one end of the anchoring inner tube (1) is provided with a grid-shaped anchoring cage (1a), the other end of the anchoring inner tube is combined with a connecting piece (4) with different-shaped holes to be fixed together, the connecting piece (4) is combined with a bent guide tube (5), the outer diameter of the anchoring inner tube (1) is just matched with the inner diameter of the outer locking sleeve (2) and can slide, the outer locking sleeve (2) is combined with a connecting fork (11), the connecting fork (11) is combined with a spring steel wire (12), the spring steel wire (12) penetrates through the bent guide tube (5) to enter a handle body (7) and then enters a sliding block (13) and is fixed in the sliding block (13) by a fastening screw (14), the sliding block (13) is provided with a section of screw (13e) to be connected with a push button (10), and the left end of the handle body (7) is connected with an end cover (6), The middle is sleeved with a cylinder (8), and the right end is provided with a tail cover (9).

The tail end of the anchoring inner pipe (1) is provided with 2-4 rectangular windows (1d), the long side of each rectangular window is along the axial direction of the pipe, the short side of each rectangular window is along the circumferential direction, 2-4 longitudinal cage bars (1c) and a lower top ring (1b) are formed, a grid-shaped anchoring cage (1a) is formed, namely, the cage bars and the top ring are part of the pipe, and the other end of the anchoring inner pipe (1) is combined with a connecting piece (4) to be fixed together.

The anchoring inner tube (1) is made of a miniature metal tube, has certain elasticity, can be properly deformed when a stump is sleeved, and can be used for pushing the push button (10) to enable the outer locking sleeve (2) to descend to wrap the anchoring cage (1a) after the head of an instrument is broken in the root canal, and the cross section of the root canal file is usually not round but square or polygonal, and the edges are spirally distributed (commonly called as threads), so that the stump can be clamped in the anchoring cage (1 a).

The connecting piece (4) is cylindrical in shape, a ring flange (4a) is arranged in the middle, the upper thin part is a smooth cylinder (4d), the lower thin part is provided with a thread (4e), a round hole (4c) is arranged in the connecting piece, a transverse partition plate (4b) with a special-shaped through hole (4f) in the center is arranged at the approximate middle position of the hole, the special-shaped through hole (4f) is of a structure symmetrical in two orthogonal directions and consists of 4 sections of circular arcs and 4 sections of straight lines, namely two sections of symmetrical concentric small circular arcs (4g), two sections of symmetrical concentric large circular arcs (4h) and 4 sections of straight lines (4i), the two groups of large and small circular arcs are concentric, the 4 sections of straight lines are positioned on the radius of the circle where the circular arcs are positioned, the circular arcs form an opposite-shaped hole consisting of a central circular hole and fan-shaped holes symmetrical to two sides of the central circular hole, meanwhile, the diameter of the small arc (4g) coincides with the outer diameter of the anchoring inner tube (1), and the diameter of the large arc (4h) coincides with the outer diameter of the clevis (11).

The upper end of the outer locking sleeve (2) is combined with a connecting fork (11) and fixed with each other, the connecting fork (11) is tubular in shape, two through grooves are formed in the connecting fork (11) so that two symmetrical branches (11c) can be formed, namely, the two branches are part of a pipe and have inner circular hole surfaces (11d), a lower circular ring (11a) of the connecting fork (11) is sleeved at the upper end of the outer locking sleeve (2), the branch bottom surfaces (11b) of the two branches are flush with the upper end surface of the outer locking sleeve (2), and meanwhile, a spring steel wire (12) is inserted into the inner circular hole surface (11d) at the upper end of the connecting fork (11) for a certain distance and is combined with the inner circular hole surface to be fixed with each other.

The smooth cylinder (4d) of the connecting piece (4) is combined with and plugged into the combining concave (5e) of the bent guide tube (5) and is fixed by welding, and the thread (4e) is combined with the internal thread of the protective cover (3), so that the upper end of the anchoring sleeve is protected from influencing other work due to the up-and-down movement of the connecting fork (11) during work.

An anchoring inner pipe assembly formed by combining the anchoring inner pipe (1) and a connecting piece (4), and an outer locking sleeve assembly composed of the outer locking sleeve (2), a connecting fork (11) and a spring steel wire (12) which are mutually nested to form an anchoring sleeve sliding mechanism, namely, the outer locking sleeve (2) is sleeved on the anchoring inner pipe (1), the branch (11c) of the connecting fork (11) passes through the symmetrical fan-shaped through hole area of the opposite-shaped hole (4f) in the connecting piece (4) and can slide up and down for a certain distance, namely, the connecting fork (11) can drive the external locking sleeve (2) to move on the anchoring inner tube (1), the spring steel wire (12) combined with the connecting fork (11) can push and pull to control the sliding action, and the spring steel wire (12) finally reaches the small hole (13g) of the sliding block (13) and is clamped by the fastening screw (14).

Therefore, the anchoring inner tube assembly is fixed, while the outer lock sleeve assembly is movable up and down, when the push button is pushed forward, i.e. towards the direction of the bent guide tube (5), the locking sleeve (2) descends to enclose the anchoring cage (1a), the maximum descending distance is determined by the stroke of the push button (10), and the pushing distance can be determined by the user according to the situation in the stroke range during use.

The left end of the bending guide pipe (5) is provided with a flange (5a), a flange notch (5b), a flange bottom surface (5c) and a through hole (5d) are arranged on the flange (5a), a combining concave surface (5e) is arranged at the other end of the bending guide pipe, the flange (5a) of the bending guide pipe (5) is combined with the round concave surface (7i) at the left end of the handle body (7), therefore, the flange bottom surface (5c) of the bending guide pipe (5) is closely attached to and combined with the round concave surface (7i) at the left end of the handle body (7), meanwhile, the flange notch (5b) of the bending guide pipe is in contraposition matching with the round pin (7j) of the latter, and therefore, the spring steel wire (12) enters the left end small hole (7h) of the handle body (7) through the through hole (5d) of.

The spring wire (12) is constrained in the central through hole (5d) of the bending guide tube (5) so that there is no problem of "instability" (note: in engineering, when the elongated part is in a vertical state, if a small axial force is applied to it, it will be suddenly bent, which is called "instability", the bending deformation of which is in the elastic range, but when the axial force disappears, it is not necessarily possible to restore to a straight state, depending on the length, but can be automatically restored without being too long, so that the elongated part is not suitable for bearing pressure, and is usually suitable only for bearing tensile force, i.e. when the pull cord is used, but can bear a certain pressure if it is well constrained, and the pushing force applied to the spring wire (12) by the push button (10) will push the outer lock sleeve assembly, i.e. "outer lock sleeve (2) + clevis (11) + spring wire (12)", and the anchor cage is downwards slid along the anchoring inner pipe (1), so that the wrapping locking of the anchor cage is realized.

The handle body (7) is cylindrical in shape, the left end and the right end of the handle body are respectively provided with a left external thread (7a) and a right external thread (7e), the middle section is provided with a cylinder (7d), a handle flange (7b) is arranged near the left end, a push button plane (7c) is arranged on the front surface, a guide groove (7g) and an assembly groove (7f) are arranged below the plane of the push button, the three are in vertical symmetry structure, the upper and lower inner walls of the guide groove (7g) are also provided with symmetrical narrow guide rail grooves (7k) which are consistent in size and matched with the square convex edges (13b) on the slide block (13), the left end is provided with a circular concave surface (7i), the center of the bent guide pipe is provided with a small hole (7h), the top of the bent guide pipe is provided with a round pin (7j), the round concave surface (7j) and the round pin (7i) thereof are tightly matched with a flange (5a) of the bent guide pipe (5), and finally the bent guide pipe is pressed and fixed by an end cover (6).

The slide block (13) is composed of a cuboid (13a) and a cylinder (13d), square convex ribs (13b) are symmetrically arranged on the upper surface and the lower surface of the cuboid (13a), a small hole (13g) is arranged on the left end surface of the cuboid, a right end hole (13c) is arranged on the right end surface of the cuboid, the small hole (13g) and the right end hole (13c) are penetrated inside, the penetrating position is arranged inside the right side of the cylinder (13d), the size of the upper and lower square convex ribs (13b) is consistent with the size of an upper and lower narrow guide rail groove (7k) of a guide groove (7g) of the handle body (7) and are mutually matched, therefore, the slide block (13) can slide for a distance from left to right in the guide groove of the handle body (7), the outer surface of the cylinder (13d) is provided with external threads, namely the push button threads (13f) are mutually matched with the internal threads of the push button (10), and the center of, the internal thread of the screw is matched with a fastening screw (14).

The inner thread of the end cover (6) is matched with the outer thread (7a) at the left end of the handle body (7) to press and fix the flange (5a) of the bent guide pipe (5), the sleeve (8) is sleeved on the handle body (7) and then props against the right end of the handle flange (7b), the inner thread of the tail cover (9) is matched with the outer thread (7e) at the right end of the handle body (7) until the inner thread props against the right end of the sleeve (8), and therefore the distance, namely the stroke, of the slide block capable of sliding left and right is determined by the axial width of the handle flange (7b) of the handle body (7).

Preferably, the catching cage pipe (1), the locking sleeve (2), the connecting fork (11) and the bent guide pipe (5) are all in a tubular shape, are made of miniature metal pipes and are round pipe profiles with smooth inner and outer surfaces, the sources are rich, the cost can be well controlled, the catching cage (1a) and the bifurcation (11c) are both made by a precision laser processing process or other methods, and the flange (5a) is made by a precision machining process and welded on the pipe head of the bent guide pipe (5).

Preferably, the outer diameter of the anchoring inner tube (1) is 0.6-1.2, the thickness of the tube wall is 0.07-0.15, the anchoring inner tube can be divided into a plurality of specifications so as to be suitable for extracting broken instruments in root canals of different sizes, and correspondingly, the outer locking sleeve (2) is matched with the outer locking sleeve; but the bent guide tube (5) and the protective cover (3) are not changed; for the connecting piece (4), the diameter of the arc of the center hole is consistent with that of the corresponding anchoring inner pipe only by the small arc (4g) of the special-shaped through hole (4f) with different specifications; for the connecting fork (11), the outer diameter of the connecting fork is unchanged, and the inner circular hole surface (11d), namely the inner diameter, needs to be consistent with the outer diameter of the outer locking sleeve (2); as for the spring wire (12), the diameter thereof can be selected to be consistent with the outer diameter of the outer lock sleeve (2), so that the manufacturing cost can be reduced, and of course, the diameter can also be fixed to be a same diameter.

Preferably, the diameter of the spring steel wire (12) can be fixed to be one, the maximum external locking sleeve diameter value can be selected, and when the maximum specification is adopted, the diameter of the inner circular hole surface (11d) of the joint part of the connecting fork (11) and the spring steel wire is the diameter of the spring steel wire, so that for the maximum specification of the invention, the inner circular hole surface (11d) of the connecting fork (11) is a single circular hole surface; for other specifications, namely other specifications smaller than the maximum specification, the inner circular hole surface (11d) of the connecting fork (11) is a stepped hole, the diameter of the inner circular hole surface of the part combined with the spring steel wire is larger, and fig. 23 shows the situation, the outer locking sleeve (2) does not belong to the maximum specification, so the inner diameter of the inner circular hole surface (11d) of the connecting fork (11) is the stepped hole.

Preferably, a support tube (15) can be embedded in the small hole (13g) at the left end of the sliding block (13), so that the spring steel wire (12) can be prevented from being unstable in the arc-shaped cavity (7gg), and fig. 24 shows that the arc-shaped cavity (7gg) is formed by milling at the left end of the guide groove (7g) of the handle body (7), and when the thickest spring steel wire is used, the support tube can be omitted.

Preferably, the cage bars (1c) of the anchoring cage are shaped, for example, by thickening them by means of a micro-forming (stamping) process, which means stamping them in a direction along the circumference and perpendicular to the plane of symmetry of the cage bars, so that the radial dimension of the cage bars is widened/thickened, so that the outer diameter of the cage bars (meaning the diameter of revolution around the axis of the tube) is slightly increased/expanded, so that the diameter of the cage bars can be controlled to be increased in the range of 0.1-0.2 mm, and then circumferential grooves are formed on the inner surface of the cage bars by means of a precision laser machining process, so as to enhance the gripping ability of the anchoring cage, i.e. the thickened cage bars (1cc) with inner grooves, so that when the outer locking sleeve (2) is lowered to wrap the anchoring cage (1a), the thickened cage bars (1cc) with inner grooves are elastically contracted by the radial pressure, so that the inner space of the cage bars is narrowed to perform a clamping action, so that the fracture instrument in the root canal can, fig. 25 shows the grooved thickened cage bar (1cc) in position, and fig. 26 shows the cage bar elastically contracted after the outer lock sleeve (2) is lowered.

The examples illustrate that: fig. 13 to 15 show the process of assembling and combining the inner tube assembly with the outer lock sleeve assembly for connection, wherein fig. 13 shows the inner tube assembly (1) inserted into the outer lock sleeve (2) (from the top of the fork (11)), fig. 14 shows the inner tube assembly (1) inserted in place, i.e. reaching the limit end of the outer lock sleeve assembly, and fig. 15 shows the spring wire (12) inserted into the inner circular hole surface (11d) of the fork (11) upper end fork (11c) to a certain depth, and then fixed by welding after the position is determined.

The invention has the advantages that the anchoring sleeve consisting of the grid-shaped anchoring cage and the external locking sleeve is adopted, the grid-shaped anchoring cage consists of the cage strips and the top ring, a plurality of rectangular windows and a center hole of the top ring can be observed from different angles, under a microscope, a doctor can more easily see the stump and judge the position of the stump, and then the anchoring cage is sleeved on the head of the stump, thereby greatly reducing the working load generated by position judgment and grabbing when the doctor carries out the operation of taking out the broken apparatus in the root canal, leading the capture of the stump to be easier, simultaneously, the anchoring cage can be inwards contracted and provide enough strength, leading the operation of taking out the stump not to be wasted due to insufficient strength of a capturing part or insufficient holding power, and the invention has simple structure, fine size and simple and convenient use, and is easy to observe the broken apparatus in the root canal remained in the tooth root canal, Catching and locking, and thereby removing it.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.