阅读说明：本技术 一种骨折锁定钻头及其内固定组件 (A kind of fracture locking drill bit and its interior fixation kit ) 是由 王杨 陆骅 王伟 倪斌斌 沈浩 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种骨折锁定钻头及其内固定组件,包括依次连接的第一钻头段和第二钻头段,第二钻头段的直径大于第一钻头段的直径,能够使近侧皮质螺钉孔的孔径大于远侧皮质螺钉孔的孔径；远侧皮质螺钉孔的孔径与普通锁定螺钉钻头直径一致,以达到锁定螺钉远侧皮质咬合固定的作用；近侧皮质螺钉孔的孔径随锁定螺钉长度的增加而增加,保证无论锁定螺钉长度如何,骨折断端两侧皮质微动始终保持平衡,达到促进骨痂均匀生长的目的。(The invention discloses a kind of fracture locking drill bit and its interior fixation kits, including sequentially connected first drill bit segment and the second drill bit segment, the diameter of second drill bit segment is greater than the diameter of the first drill bit segment, and the aperture of nearside cortical screw holes can be made to be greater than the aperture of Distal cortex screw hole；The aperture of Distal cortex screw hole is consistent with common locking screw bits diameter, to have the function that the occlusion of lock screw Distal cortex is fixed；The aperture of nearside cortical screw holes increases with the increase of lock screw length, guarantees that the cortex fine motion of fracture site two sides remains balance regardless of lock screw length, achievees the purpose that promote poroma homoepitaxial.)

1. a kind of fracture locks drill bit, which is characterized in that including the first drill bit segment and connect with first drill bit segment second Drill bit segment, first drill bit segment are bored for processing Distal cortex screw hole, the diameter and lock screw of first drill bit segment The diameter of head matches；The diameter of second drill bit segment is greater than the diameter of first drill bit segment, for processing nearside cortex Screw hole can make the aperture of the nearside cortical screw holes be greater than the aperture of the Distal cortex screw hole.

2. fracture according to claim 1 locks drill bit, it is characterised in that: the diameter of second drill bit segment allows to lock Screw generates the strain of 2-10% in the nearside cortical screw holes.

3. fracture according to claim 2 locks drill bit, it is characterised in that: first drill bit segment is bored far from described second One end of head section is helical structure.

4. fracture according to claim 3 locks drill bit, it is characterised in that: the length of first drill bit segment is 8- 12mm。

5. fracture according to claim 4 locks drill bit, it is characterised in that: the length of second drill bit segment is 45- 55mm。

6. fracture according to claim 5 locks drill bit, it is characterised in that: when the diameter of the lock screw is 4.5mm, The diameter of first drill bit segment is 3.2mm, and the length of first drill bit segment is 10mm, when fracture gap size is 10mm When, the strain size of the lock screw is 0.5mm, and the diameter of second drill bit segment is 5mm, the length of second drill bit segment Degree is 50mm.

7. a kind of fracture locks interior fixation kit characterized by comprising

Lockplate, is fixed on fracture, and the lockplate is equipped with multiple lock holes and sliding eye；

Fracture as claimed in any one of claims 1 to 6 locks drill bit, for being punched to the corresponding backbone of the lock hole, The aperture of the nearside cortical screw holes of formation is greater than the aperture of Distal cortex screw hole；

Lock screw, the lock screw pass through the lock hole and the nearside cortical screw holes and the Distal cortex screw Hole connection.

8. fracture according to claim 7 locks interior fixation kit, it is characterised in that: the lockplate is in long round shape, institute The width for stating lock hole is 4.5mm, and the length of the lock hole is 12-15mm, the length direction of the lock hole and the lock The length direction of fixed board is parallel.

Technical field

The present invention relates to orthopaedic trauma internal fixation device technical field, drill bit and its interior is locked more particularly to a kind of fracture Fixation kit.

Background technique

At present for mostly being locked closing at epiphysis end or backbone with locking steel plate and remote cortex in the processing of comminuted fracture Determine based on screw fixation.Locking steel plate because between screw and steel plate mutually locking due to generate strong angle stability, improve fracture Fixing intensity, while steel plate is not contacted with periosteum, it is less to the destruction of fracture blood supply, be conducive to union.But it is this solid It is excessive to determine the rigidity of structure in method, causes stress stimulation insufficient, so as to cause the risk of screw loosening and Unstable internal fixation compared with Greatly.Distal cortex lock screw and steel plate nail hole and Distal cortex form threaded engagement and fix, and screw end to end between be nothing The screw-rod structure of screw thread, screw diameter is smaller, and in the bending of screw stress, the steel plate side cortex of fracture end and contralateral cortex can be with Fine motion occurs together, this fine motion is the uniform fine motion of entire fracture end, to increase the formation of poroma under steel plate.But the system The permitted uniform fine motion of fracture end is influenced by screw length (backbone diameter), uniformly micro- when backbone diameter is less than normal or excessive It is dynamic to be destroyed.

Summary of the invention

In order to solve the above technical problems, the present invention provides a kind of fracture locking drill bit and its interior fixation kit.

A kind of fracture of the invention locks drill bit, including the first drill bit segment and the second brill connecting with first drill bit segment Head section, first drill bit segment is for processing Distal cortex screw hole, the diameter and lock screw drill bit of first drill bit segment Diameter match；The diameter of second drill bit segment is greater than the diameter of first drill bit segment, for processing nearside cortex spiral shell Nail hole can make the aperture of the nearside cortical screw holes be greater than the aperture of the Distal cortex screw hole.

Above technical scheme is preferred, and the diameter of second drill bit segment allows lock screw in the nearside cortex screw The strain of 2-10% is generated in hole.

Above technical scheme is preferred, and the one end of first drill bit segment far from second drill bit segment is spiral shape knot Structure.

Above technical scheme is preferred, and the length of first drill bit segment is 8-12mm.

Above technical scheme is preferred, and the length of second drill bit segment is 45-55mm.

Above technical scheme is preferred, and when the diameter of the lock screw is 4.5mm, the diameter of first drill bit segment is 3.2mm, the length of first drill bit segment are 10mm, and when fracture gap size is 10mm, the lock screw should become larger Small is 0.5mm, and the diameter of second drill bit segment is 5mm, and the length of second drill bit segment is 50mm.

A kind of fracture of the invention locks interior fixation kit, comprising:

Lockplate, is fixed on fracture, and the lockplate is equipped with multiple lock holes and sliding eye；

Fracture locking drill bit as the aforementioned, for being punched to the corresponding backbone of the lock hole, the nearside cortex spiral shell of formation The aperture of nail hole is greater than the aperture of Distal cortex screw hole；

Lock screw, the lock screw pass through the lock hole and the nearside cortical screw holes and the Distal cortex screw Hole connection.

Above technical scheme is preferred, and the lockplate is in long round shape, and the width of the lock hole is 4.5mm, the lock The length for determining hole is 12-15mm, and the length direction of the lock hole is parallel with the length direction of the lockplate.

The advantages and positive effects of the present invention are: the present invention provides a kind of fracture to lock drill bit, including successively connect The first drill bit segment and the second drill bit segment connect, the diameter of the second drill bit segment are greater than the diameter of the first drill bit segment, can make nearside skin The aperture of matter screw hole is greater than the aperture of Distal cortex screw hole；The aperture of Distal cortex screw hole and common locking screw bits Diameter is consistent, to have the function that the occlusion of lock screw Distal cortex is fixed；The aperture of nearside cortical screw holes is with lock screw Length (backbone diameter) increases and increases, and guarantees that the cortex fine motion of fracture site two sides is protected always regardless of lock screw length Maintain an equal level weighing apparatus, achievees the purpose that promote poroma homoepitaxial.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of fracture locking drill bit provided by one embodiment of the invention；

Fig. 2 is the structural schematic diagram of lockplate provided by the embodiment of the present invention one.

Wherein: 1, the first drill bit segment；2, the second drill bit segment；3, lockplate；4, lock hole.

Specific embodiment

It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple " It is meant that two or more.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition Concrete meaning in the present invention.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

On the one hand the present embodiment provides a kind of fracture locking drill bit, as shown in Figure 1, including the first drill bit segment 1 and with first Second drill bit segment 2 of drill bit segment connection, shape are similar to ladder-like, and the first drill bit segment 1 is for processing Distal cortex screw hole, and the The diameter of one drill bit segment is identical as original lock screw bit diameter, usually less than the diameter of lock screw, reaches locking spiral shell Follow closely the fixed effect of Distal cortex occlusion；The diameter of second drill bit segment 2 is greater than the diameter of the first drill bit segment, for processing nearside skin Matter screw hole can make the aperture of nearside cortical screw holes be greater than the aperture of Distal cortex screw hole.

Specifically, the diameter of the second drill bit segment 2 allows lock screw to generate answering for 2-10% in nearside cortical screw holes Become.

Optionally, the one end of the first drill bit segment 1 far from the second drill bit segment 2, that is, drill bit head end is helical structure, spiral shape Structure is identical as the helical structure of existing drill bit cephalic par, pierces cortex to carry out fluting.The present embodiment energy in drilling So that nearside cortex screw aperture is greater than Distal cortex screw aperture, and is adapted with required strain.Distal cortex screw aperture It is consistent with common locking screw bits diameter, to have the function that lock screw is engaged fixation with Distal cortex.Nearside cortex spiral shell Nail hole diameter increases with the gap size of screw diameter and fracture end and is increased, and guarantees regardless of screw length, fracture site two Side cortex fine motion remains balance, achievees the purpose that promote poroma homoepitaxial.

In the case where strain controlling, in the lesser situation of Distal cortex aperture, in order to enable distal cortex and lock The screw thread for determining screw is mutually engaged, and takes 1 length of the first drill bit segment shorter, is 8-12mm, and preferably the first drill bit segment 1 is 10mm, energy Enough so that distal cortex will not lead to corresponding blood vesssls and nerves injuries on the inside of complete penetration to distal femur.Second drill bit segment 2 is Lock screw provides corresponding strain scope of activities, and the diameter of the second drill bit segment 2 allows lock screw in nearside cortical screw holes The interior strain for generating 2-10%, the length of the second drill bit segment 2 are 45-55mm, and preferably the second drill bit segment is 50mm.

Preferably, when the diameter of lock screw is 4.5mm, the diameter of the first drill bit segment 1 is 3.2mm, the first drill bit segment Length is 10mm, and when fracture gap size is 10mm, the strain size of lock screw is 0.5mm, the diameter of the second drill bit segment 2 For 5mm, the length of the second drill bit segment is 50mm.

Fracture gap, lock screw diameter, the relationship of the first drill bit segment diameter and the second drill bit segment diameter are as shown in the table:

By taking lock screw diameter d=5.0mm as an example, fracture gap, lock screw diameter, the first drill bit segment diameter and the second drill bit The relationship of section diameter is as shown in the table:

On the other hand the present embodiment provides a kind of interior fixation kit of fracture locking, comprising:

It is fixed on the lockplate 3 of fracture, lockplate is equipped with the lock hole 4 of multiple oblongs；

Fracture above-mentioned locks drill bit, for punching to the corresponding backbone of lock hole, the nearside cortical screw holes of formation Aperture is greater than the aperture of Distal cortex screw hole；

Lock screw, lock screw passes through lock hole and nearside cortical screw holes are connect with Distal cortex screw hole.Lock screw Belong to the prior art, details are not described herein for specific structure.

Preferably, as shown in Fig. 2, lockplate 3 is in long round shape, lamellar steel plate, the length direction and lockplate of lock hole 4 Length direction be arranged in parallel.The quantity of lock hole is generally 4-12；Its particular number can be done according to actual use situation Adaptive change.It include 4 lock holes in the present embodiment, the width of lock hole is 4.5mm, and the length of lock hole is 12-15mm.

The course of work of the present embodiment: lockplate has been attached to fracture bone surface when punching, utilizes the locking drill bit pair Backbone is punched, and so that the aperture of nearside cortical screw holes is greater than the aperture of Distal cortex screw hole, locking spiral shell is screwed into after punching Nail, so that the Distal cortex screw hole of lock screw and distal end locks.

The advantages and positive effects of the present invention are: the present invention provides a kind of fracture to lock drill bit, including successively connect The first drill bit segment and the second drill bit segment connect, the diameter of the second drill bit segment are greater than the diameter of the first drill bit segment, can make nearside skin The aperture of matter screw hole is greater than the aperture of Distal cortex screw hole；The aperture of Distal cortex screw hole and common locking screw diameter Unanimously, to have the function that the occlusion of lock screw Distal cortex is fixed；The aperture of nearside cortical screw holes is with lock screw length (backbone diameter) increases and increases, and guarantees that the cortex fine motion of fracture site two sides remains flat regardless of lock screw length Weighing apparatus achievees the purpose that promote poroma homoepitaxial.

One embodiment of the present invention has been described in detail above, but the content is only preferable implementation of the invention Example, should not be considered as limiting the scope of the invention.It is all according to all the changes and improvements made by the present patent application range Deng should still be within the scope of the patent of the present invention.