阅读说明：本技术 髋臼锉同心维持装置 (Reamer for hip arthroplasty,acetabulum maintains device with one heart ) 是由 李翔 王爱国 时晓华 马富强 史炎鑫 邹景丽 于 2019-10-12 设计创作，主要内容包括：本发明涉及一种髋臼锉同心维持装置,该装置包括固定筒体、与固定筒体匹配的螺帽盘、及同轴固定在螺帽盘上的支撑套筒,所述的固定筒体为两端开口的薄壁圆筒状,在固定筒体上端的外圆周面上设有外螺纹,在固定筒体下端的外圆周面上设有4个针套,4个针套沿固定筒体的外圆周面均布,该针套为薄壁圆筒状,且针套的轴线沿着固定筒体的母线方向；所述的螺帽盘为圆筒状,螺帽盘的下端开口,在螺帽盘的内圆周面上设有自其下端面起的内螺纹,该内螺纹与上述的外螺纹匹配,该螺帽盘通过其内螺纹同轴旋拧在固定筒体上端的外螺纹上,所述的支撑套筒的下端同轴固定在螺帽盘的上端面；本发明保证更换锉头后,锉头能够在上次锉磨的位置上进行再次锉磨。(The present invention relates to a kind of reamer for hip arthroplasty,acetabulum to maintain device with one heart, the device include fixed cylinder, with the matched nut disk of fixed cylinder and the coaxial stop sleeve being fixed on nut disk, the fixed cylinder is the thin-wall circular tubular of both ends open, external screw thread is equipped on the outer circumference surface of fixed cylinder upper end, 4 needle guards are equipped on the outer circumference surface of fixed cylinder lower end, 4 needle guards are uniformly distributed along the outer circumference surface of fixed cylinder, the needle guard is thin-wall circular tubular, and the axis of needle guard is along the generatrix direction of fixed cylinder；The nut disk is cylindrical shape, the lower ending opening of nut disk, the internal screw thread being equipped on the inner peripheral surface of nut disk from its lower end surface, the internal screw thread is matched with above-mentioned external screw thread, the nut disk is coaxially screwed on the external screw thread of fixed cylinder upper end by its internal screw thread, and the lower end of the stop sleeve is coaxially fixed on the upper surface of nut disk；After the present invention guarantees replacement file head, file head can carry out rasion again on the position of last time rasion.)

1. reamer for hip arthroplasty,acetabulum maintains device with one heart, the device include fixed cylinder, with the matched nut disk of fixed cylinder and coaxial fixed Stop sleeve on nut disk further includes reamer for hip arthroplasty,acetabulum, it is characterized in that:

The fixed cylinder is the thin-wall circular tubular of both ends open, and outer spiral shell is equipped on the outer circumference surface of fixed cylinder upper end Line, the externally threaded starting point are equipped with N number of needle guard on the upper edge of fixed cylinder on the outer circumference surface of fixed cylinder lower end, Wherein N >=3, N number of needle guard is uniformly distributed along the outer circumference surface of fixed cylinder, which is thin-wall circular tubular, and the axis of needle guard along The generatrix direction of fixed cylinder；

The nut disk is cylindrical shape, and the lower ending opening of nut disk is equipped on the inner peripheral surface of nut disk from its lower end surface The internal screw thread risen, the internal screw thread are matched with above-mentioned external screw thread, which is coaxially screwed in fixed cylinder by its internal screw thread On the external screw thread of upper end, the lower end of the stop sleeve is coaxially fixed on the upper surface of nut disk, and the inside of stop sleeve It is connected to the inside of nut disk.

2. reamer for hip arthroplasty,acetabulum according to claim 1 maintains device with one heart, it is characterized in that: the top of the stop sleeve is equipped with Radially run through the threaded hole of barrel, which is screwed with matched lock-screw.

3. reamer for hip arthroplasty,acetabulum according to claim 1 maintains device with one heart, it is characterized in that: the upper surface of the nut disk is equipped with The observation window armatine of hollow out, the observation window armatine of the hollow out include at least three and are evenly arranged on around stop sleeve.

4. reamer for hip arthroplasty,acetabulum according to claim 1 maintains device with one heart, it is characterized in that: being set on the barrel of the fixed cylinder There is the watch window second of hollow out, and the lower part of fixed cylinder is equipped with the operation notch for cutting off its circumference barrel.

5. reamer for hip arthroplasty,acetabulum according to claim 1 maintains device with one heart, it is characterized in that: the lower end surface of each needle guard and fixed cylinder The lower end surface of body is concordant.

6. reamer for hip arthroplasty,acetabulum according to claim 1 maintains device with one heart, it is characterized in that: the number N of the needle guard is equal to 4.

7. reamer for hip arthroplasty,acetabulum according to claim 1 maintains device with one heart, it is characterized in that: the reamer for hip arthroplasty,acetabulum includes hemispherical shell File head and columned drilling rod, file the cross bayonet lock that square crossing is fixed on the section of head, the lower end of above-mentioned drilling rod passes through It is threaded with cylindric connector sleeve, the lower end surface of the connector sleeve is uniformly distributed, and there are four L-type card slots, and the lower end of connector sleeve passes through L On the corresponding cross bayonet lock for being stuck in file head of type card slot, several sword holes for having cutting edge are covered on the spherical surface of file head.

8. reamer for hip arthroplasty,acetabulum according to claim 7 maintains device with one heart, it is characterized in that: the diameter and support sleeve of the drilling rod The internal diameter of cylinder is equal, and the diameter of the file head is less than the internal diameter of fixed cylinder.

Technical field

The present invention relates to the technical field of medical instrument, in particular to a kind of reamer for hip arthroplasty,acetabulum maintains device with one heart.

Background technique

Artificial full hip-joint replacement is a kind of similar with being made with the metal material of biocompatibility and satisfactory mechanical property Articular prosthesis is implanted into using operation method and is destroyed intra-articular, purpose by disease or injury by the prosthese of human body Bones and joints It is to remove pain, restores the activity and original function in joint, artificial hip joint replacing can makes patient's early stage lower ground and function forging Refining restores hip joint normal physiological function.

In total hip arthroplasty, the femoral head that lesion has occurred for patient's body is taken out, by corresponding articular prosthesis It installs, and wherein, it is necessary to by the acetabular fossa progress rasion of human body to the outer dimension for meeting articular prosthesis, clinically usually Rasion is carried out to acetabular fossa using reamer for hip arthroplasty,acetabulum, so that acetabular fossa is matched with Joint orthosis, but rasion is being carried out to acetabular fossa In the process, it need to be carried out replacing the multiple rasion of various sizes of file head progress according to the depth of rasion and the size of acetabular fossa, and it is every When carrying out rasion again after secondary replacement file head, it is difficult precisely to find the position of last rasion, will lead to acetabular fossa and be rasped It is bad so as to cause Joint orthosis installation at elliposoidal, increase the loosening rate and displacement rate of articular prosthesis, causes limbs length poor Different, prosthese hits, interface abrasion, even needs to carry out revision procedure, reduces the service life of articular prosthesis, increases patient's economy Burden, therefore, now needs the positioning device in a kind of pair of reamer for hip arthroplasty,acetabulum use process.

Summary of the invention

To solve the above-mentioned problems, the present invention proposes that a kind of reamer for hip arthroplasty,acetabulum maintains device with one heart.

Particular content is as follows: reamer for hip arthroplasty,acetabulum maintains device with one heart, which includes fixed cylinder and the matched spiral shell of fixed cylinder Disk and the stop sleeve being coaxially fixed on nut disk, further include reamer for hip arthroplasty,acetabulum, it is characterized in that:

The fixed cylinder is the thin-wall circular tubular of both ends open, and outer spiral shell is equipped on the outer circumference surface of fixed cylinder upper end Line, the externally threaded starting point are equipped with N number of needle guard on the upper edge of fixed cylinder on the outer circumference surface of fixed cylinder lower end, Wherein N >=3, N number of needle guard is uniformly distributed along the outer circumference surface of fixed cylinder, which is thin-wall circular tubular, and the axis of needle guard along The generatrix direction of fixed cylinder；

The nut disk is cylindrical shape, and the lower ending opening of nut disk is equipped on the inner peripheral surface of nut disk from its lower end surface The internal screw thread risen, the internal screw thread are matched with above-mentioned external screw thread, which is coaxially screwed in fixed cylinder by its internal screw thread On the external screw thread of upper end, the lower end of the stop sleeve is coaxially fixed on the upper surface of nut disk, and the inside of stop sleeve It is connected to the inside of nut disk.

Preferably, the top of the stop sleeve is equipped with the threaded hole for radially running through barrel, the threaded hole inward turning It is screwed with matched lock-screw.

Preferably, the upper surface of the nut disk is equipped with the observation window armatine of hollow out, and the observation window armatine of the hollow out is extremely Less include three and is evenly arranged on around stop sleeve.

Preferably, the barrel of the fixed cylinder is equipped with the watch window second of hollow out, and the lower part of fixed cylinder is set There is the operation notch for cutting off its circumference barrel.

Preferably, the lower end surface of each needle guard and the lower end surface of fixed cylinder are concordant.

Preferably, the number N of the needle guard is equal to 4.

Preferably, the reamer for hip arthroplasty,acetabulum includes the file head and columned drilling rod of hemispherical shell, is filed fixed on the section of head There is a cross bayonet lock of square crossing, the lower end of above-mentioned drilling rod is connected through a screw thread cylindric connector sleeve, under the connector sleeve End face is uniformly distributed, and there are four L-type card slots, and the lower end of connector sleeve is stuck on the cross bayonet lock for filing head by the way that L-type card slot is corresponding, in file head Spherical surface on be covered with several have cutting edge sword holes.

Preferably, the diameter of the drilling rod and the internal diameter of stop sleeve are equal, and the diameter of the file head, which is less than, to be fixed The internal diameter of cylinder.

Advantageous effects of the invention:

The present invention is that a kind of reamer for hip arthroplasty,acetabulum maintains device with one heart, the device include fixed cylinder, with the matched nut disk of fixed cylinder, And coaxially it is fixed on the stop sleeve on nut disk；The needle guard that screw needle passes through fixed cylinder lower end is fixed in the hip of patient Securely motionless after on bone, the concentricity after head is filed conducive to replacement is stablized, and the center after guaranteeing replacement file head every time will not change Become, guarantee the rasion quality of acetabular fossa, reduces the loosening rate and displacement rate of operation posterior joint prosthese；Stop sleeve passes through nut disk It is screwed on fixed cylinder, is easily installed and dismantles, can quickly replace file head in this way, operating time is greatly reduced, reduce Due to the various operation risks of time bring；The watch window of hollow out is equipped on the nut disk and fixed cylinder of stop sleeve, The process of the case where filing head convenient for observation and rasion, avoids surgical procedure from making mistakes；By needle guard by fixed cylinder and hip to be drilled Bone fixation together, promotes the stability of fixed cylinder；Therefore, the present invention can improve acetabular fossa in total hip arthroplasty Rasion quality, the matching degree for being implanted into Joint orthosis is higher, improves the quality and efficiency of total hip arthroplasty, reduces full hip The loosening rate and displacement rate of artificial limb after joint replacement surgery.

Detailed description of the invention

Fig. 1 is the schematic perspective view that reamer for hip arthroplasty,acetabulum maintains device with one heart；

Fig. 2 is that reamer for hip arthroplasty,acetabulum maintains device explosion structural schematic diagram with one heart；

Fig. 3 is the schematic perspective view of nut disk and stop sleeve；

Fig. 4 is the sectional view of Fig. 3 front view structure；

Fig. 5 is the schematic perspective view of fixed cylinder；

Fig. 6 is that reamer for hip arthroplasty,acetabulum is mounted on the schematic perspective view in the device of the invention；

Fig. 7 is the schematic perspective view for filing head and connector sleeve；

In figure: 11. fixed cylinders, 12. watch window second, 13. operation notches, 14. needle guards, 15. external screw threads, 21. nut disks, 22. observation window armatine, 23. stop sleevees, 24. lock-screws, 25. threaded holes, 26. internal screw threads, 31. drilling rods, 32. connector sleeves, Section, the 35. sword holes, 36. cutting edges, 37. cross bayonet locks of 321.L type card slot, 33. file heads, 34. file heads.

Specific embodiment