CN203458463U

CN203458463U - Crushed bone fixator

Info

Publication number: CN203458463U
Application number: CN201320569101.1U
Authority: CN
Inventors: 陈浩; 高山惠
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-14
Filing date: 2013-09-14
Publication date: 2014-03-05
Anticipated expiration: 2023-09-14

Abstract

The utility model relates to an internal fracture fixation instrument, in particular to a crushed bone fixator. The crushed bone fixator comprises a bone nail used for being fixed on a crushed bone, wherein the bone nail comprises a nail body externally provided with threads and a nail cap fixedly arranged at one end of the nail body. The crushed bone fixator is characterized by further comprising a cylindrical object and a plurality of tubular bodies nested on the cylindrical object, wherein recessed parts used for mounting the nail cap are formed in the outer surfaces of the tubular bodies. The crushed bone fixator can fix the crushed bone from a medullary canal, damage to a periosteum during external fixation can be avoided, and bone healing is facilitated.

Description

Broken bone anchor

Technical field

This utility model relates to a kind of bone fracture internal fixing device tool, is a kind of broken bone anchor specifically.

Background technology

Existing internal fixator for setting of bone fracture tool is all to fix for the two ends of knochenbruch, broken bone piece or wire binding or the external stability at broken bone with screw for osteocomma that fracture is produced, this fixing means is when by broken reduction, the periosteum that need only deposit broken bone outer surface is peeled off, this is just to sclerite blood fortune heavy losses, affect knitting, cause that even the absorption of sclerite causes bone damaged, be directed at bone fragmentation of internal fixation objects.In order to retain to greatest extent periosteum, best broken bone fixing means is to adopt marrow inner fixed law, and fixed apparatus is set in pulp cavity, fix, but owing to lacking corresponding apparatus, marrow inner fixed law is difficult to clinical practice from inside by broken bone.

Summary of the invention

The purpose of this utility model be to provide a kind of can be from fixing the broken bone anchor of broken bone in pulp cavity.

This utility model is that the technical scheme that technical solution problem adopts is:

Broken bone anchor described in the utility model comprises for being fixed on the nail on broken bone, described nail comprises the rivet nut of peripheral hardware screw thread and the head of a nail that is fixedly installed on rivet nut one end, it is characterized in that: also comprise a column and some tubular bodies being sleeved on column, the outer surface of described tubular body is provided with for the recess of the head of a nail is installed.

The described head of a nail comprises spheroid, is arranged on the Rotary-table between spheroid and rivet nut, on the axis of the head of a nail, is provided with groove, and the bottom of described groove is lower than the demarcation line of spheroid and Rotary-table, and described recess is the installing hole that the outline with the head of a nail matches.

The described head of a nail is round table-like, and described recess is to be parallel to the dovetail groove that tubular body axis arranges.

Owing to having adopted said structure, broken bone anchor described in the utility model can be fixed broken bone in pulp cavity, causes the injury to periosteum while avoiding external stability, is conducive to knitting.

Accompanying drawing explanation

Fig. 1 is the cross section structure schematic diagram of an embodiment of this utility model.

Fig. 2 is the structural representation of the nail in Fig. 1 embodiment.

Fig. 3 is the vertical section structure schematic diagram of Fig. 1 embodiment.

Fig. 4 is the cross section structure schematic diagram of another embodiment of this utility model.

Fig. 5 is the vertical section structure schematic diagram of Fig. 4 embodiment.

The specific embodiment

As shown in Figure 1, Figure 3, broken bone anchor described in the utility model comprises for being fixed on the nail 1 on broken bone, the head of a nail 11 that described nail 1 comprises the rivet nut of peripheral hardware screw thread and is fixedly installed on rivet nut one end, also comprise a column 2 and some tubular bodies 3 being sleeved on column 2, the outer surface of described tubular body 3 is provided with for the recess of the head of a nail is installed.

As shown in Figure 2, the described head of a nail 11 comprises spheroid 13, is arranged on the Rotary-table 12 between spheroid 13 and rivet nut, on the axis of the head of a nail 11, be provided with groove 14, the bottom of described groove 14 is the demarcation line with Rotary-table 12 lower than spheroid 13, and described recess is the installing hole that the outline with the head of a nail 11 matches.

As another embodiment of the present utility model, as shown in Figure 4, Figure 5, the described head of a nail 11 is round table-like, and described recess is to be parallel to the dovetail groove 31 that tubular body 3 axis arrange.

During use without bone cips or piece are departed from from periosteum.Only will fracture after fragment fixing-stable, utilize screw tap from the bone marrow face tapping of sclerite, then the rivet nut of nail 1 is partly screwed into, now can utilize flat mouth screwdriver to inject in groove 14 and rotate nail 1, nail 1 is fixed on to the medial surface of sclerite, again the head of a nail 11 is injected in the installing hole of tubular body 3 outer surfaces, when the head of a nail 11 injects installing hole, because the bottom surface of groove 14 is positioned at the middle part of Rotary-table, therefore the head of a nail 11 has good elasticity, be subject to the extruding of installing hole, can be fixedly mounted in wherein.

By the interconnect function of column 2, a plurality of tubular body 3 series connection can be used.

Fig. 4, Fig. 5 embodiment are when in use, first adopting uses the same method is partly screwed into the rivet nut of nail 1 the bone marrow face of sclerite, then by both sides extruded tubular body 3, make dovetail groove open mouth, will the head of a nail 11 inject in dovetail grooves 31 and unclamp again, utilize tubular body 3 to restore after the fixing head of a nail of extruding force of dovetail groove 31 both sides; Also can insert the head of a nail from the end of dovetail groove 31, move axially to precalculated position.

Claims

1. broken bone anchor, comprise for being fixed on the nail (1) on broken bone, the head of a nail (11) that described nail (1) comprises the rivet nut of peripheral hardware screw thread and is fixedly installed on rivet nut one end, it is characterized in that: also comprise a column (2) and some tubular bodies (3) being sleeved on column (2), the outer surface of described tubular body (3) is provided with for the recess of the head of a nail is installed.

2. broken bone anchor according to claim 1, it is characterized in that: the described head of a nail (11) comprises spheroid (13), is arranged on the Rotary-table (12) between spheroid (13) and rivet nut, on the axis of the head of a nail (11), be provided with groove (14), the bottom of described groove (14) is lower than the demarcation line of spheroid (13) and Rotary-table (12), and described recess is the installing hole that the outline with the head of a nail (11) matches.

3. broken bone anchor according to claim 1, is characterized in that: the described head of a nail (11) is for round table-like, and described recess is to be parallel to the dovetail groove (31) that tubular body (3) axis arranges.