CN107693101B

CN107693101B - Bone fixator

Info

Publication number: CN107693101B
Application number: CN201710899329.XA
Authority: CN
Inventors: 王晗; 龚伟华; 俞超; 刘凤祥; 连小川; 赵峰
Original assignee: Shandong Weigao Orthopedic Materials Co Ltd
Current assignee: Shandong Weigao Orthopedic Materials Co Ltd
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2020-01-31
Anticipated expiration: 2037-09-28
Also published as: CN107693101A

Abstract

The invention relates to an bone fixator which comprises a fixing body, wherein the fixing body comprises a bottom plate, a side plate and a second side plate, the 0 side plate is provided with a 1 strip-shaped hole, the 2 side plate is also provided with a notch groove, the groove edge of the notch groove extends to a strip-shaped hole, the side plate and the second side plate are both arranged on the same side of the bottom plate and form an included angle with the bottom plate, the second side plate is provided with a second strip-shaped hole, the second side plate is also provided with a second notch groove, the groove edge of the second notch groove extends to the second strip-shaped hole, through the arrangement of the bottom plate, the side plate and the second side plate, the bottom plate is in contact fit with bones, the fixing claw and the second fixing claw tightly clamp the bones so as to realize the fit and fixation with the bones, and the bone fixator is made of absorbable materials of human bodies, so that the bone fixator can be degraded and absorbed by the human bodies in bone healing, the bone fixator can be taken out without secondary operation, and the arrangement of the notch groove and the second notch groove can reduce the bone.

Description

Bone fixator

Technical Field

The invention relates to the technical field of bone fixation, in particular to an bone fixator.

Background

The internal fixation is an operation in which a broken bone is directly connected and fixed inside or outside the broken bone by using a metal screw, a steel plate, an intramedullary pin, a steel wire, a bone plate or the like, and is called as internal fixation. Such procedures are commonly used in fracture reduction and osteotomy to maintain reduction of the fracture end.

Compared with , the clinical application of metal internal fixation is which is the most common internal fixation for treating fracture at present, the traditional internal fixation material for fracture is made of stainless steel, titanium and alloy thereof, the defects of the internal fixation material are gradually exposed along with the gradual expansion of the application range of the internal fixation material, and the matching degree between the internal fixation material and the skeleton is poor, thus easily generating side effects.

Disclosure of Invention

Based on this, it is necessary to provide kinds of bone fixation devices for the problem of poor fit between the internal fixation device and the bone.

The technical scheme is as follows:

A bone fixer comprises a fixing body made of absorbable material, the fixing body comprises a bottom plate, the bottom plate comprises a side end and a second side end opposite to a 0 side end, a 1 side plate, a 2 side plate is arranged on a 3 side end, a 4 side plate is provided with 5 th strip-shaped holes, a plurality of 6 strip-shaped holes are arranged at intervals, the 7 th side plate forms a 8 fixed claw, a 9 th side plate is further provided with a th notch groove, a th notch groove is an open groove and is provided with a plurality of intervals, the groove edge of the th notch groove extends to the th strip-shaped hole, the groove bottom surface of the th notch groove is provided with an inclined plane, the groove bottom wall thickness of the th notch groove is gradually increased in a direction away from the bottom plate, a second side plate is arranged on the second side end, the th side plate and the second side plate are both arranged on the same side of the bottom plate and are provided with an inclined plane, the second side plate is provided with a second notch groove, the second side plate is provided with a plurality of grooves, the inclined plane, the groove, the second notch groove is provided with a plurality of the inclined plane, the second notch groove, the inclined plane is provided with a plurality of the second notch.

Above-mentioned bone fixer, through the bottom plate, the setting of curb plate and second curb plate, the bottom plate cooperates with the bone contact, the skeleton is held tightly to stationary dog and second stationary dog, and then realize with the cooperation of skeleton and fixed, because the bottom plate, curb plate and second curb plate are formed by the preparation of human absorbable material, bone fixer and skeleton are fixed the back, be absorbed by human degradation gradually in bone growth and healing, need not the secondary operation and take out, the setting of notch groove and second notch groove reduces the stimulation of bone fixer to the damaged position of skeleton, promote the bone to develop fast.

The technical scheme is further explained in the following step :

in embodiments, the base plate is provided with stress windows for releasing stress, the stress windows are arranged in through holes, the arrangement of the stress windows can relieve the deformation stress generated when the bone fixator is used, further, the bone fixator cannot be well matched and fixed after being deformed, and the matching degree of the bone fixator and the bone is further improved .

In embodiments, the width direction and the length direction of the bottom plate are respectively the X axial direction and the Y axial direction, the bottom plate is provided with a th curved surface, the axial direction of the arc surface of the th curved surface in the length direction is the same as the X axial direction, the axial direction of the arc surface of the th curved surface in the width direction is the same as the Y axial direction, the th curved surface is arranged for better matching and fixing with the bone, and the arc surfaces of the th curved surface in the X axial direction and the Y axial direction can enable the bone fixator to be matched with the bone more tightly through the deformed stress when in use, thereby achieving better clinical use effect.

In embodiments, the bone fixator further comprises a second curved surface and a third curved surface, the second curved surface is connected with the inner side surface of the th side plate and the inner side surface of the bottom plate, the axial direction of the arc surface of the second curved surface is the same direction as the Y axial direction, the third curved surface is connected with the inner side surface of the second side plate and the inner side surface of the bottom plate, and the axial direction of the arc surface of the third curved surface is the same direction as the Y axial direction.

In embodiments, the th fixing claw comprises a plurality of th grip parts, a th strip-shaped hole is formed between every two th grip parts, the thickness of the th grip part is gradually reduced towards the direction far away from the bottom plate, the second fixing claw comprises a plurality of second grip parts, a second strip-shaped hole is formed between every two adjacent second grip parts, and the thickness of each second grip part is gradually reduced towards the direction far away from the bottom plate.

In embodiments, the gripping end of the gripping part and the gripping end of the second gripping part are both provided with arc surfaces, the arc surfaces can reduce the stimulation to the bone to the maximum when the gripping ends are tightly held with the bone, particularly, the tightly held part can also contact the flesh tissues at the root of the bone, and the arrangement greatly reduces the injury to the human body possibly caused by the tightly held part and improves the clinical treatment effect.

In embodiments, the groove bottom of the -th notch groove is provided with an inclined plane, so that the wall thickness of the groove bottom of the -th notch groove gradually decreases in the direction away from the bottom plate, and the groove bottom of the second notch groove is provided with an inclined plane, so that the wall thickness of the groove bottom of the second notch groove gradually decreases in the direction away from the bottom plate.

In embodiments, the base plate is further provided with a stop pin matched with the fracture gap, the stop pin is provided with an inclined plane arranged at an included angle with the base plate, at least two stop pins are arranged at intervals, the stop pins are matched with the fracture gap to prevent the expansion of the fracture gap, the stop pins are gradually degraded and absorbed in the process of developing and healing tissues at the fracture part, so that the stress is also gradually reduced, the development degree of the fracture part is improved, the arrangement of the inclined plane on the stop pins is convenient for the stop pins to directly slide into the fracture line gap, and the temporary treatment and operation time is saved.

In embodiments, the two stress windows are arranged at intervals, the interval between the two stress windows is half of the length of the bottom plate, the two stress windows are arranged at intervals, so that the stress relief of plastic deformation is more uniform, the bone fixator is better matched and fixed with bones, the matching degree is improved, and the pressure effect which can be generated on the bones by the bone fixator is reduced through uniform stress.

In embodiments, the strip-shaped hole and the second strip-shaped hole are both arranged in a U shape, and the strip-shaped hole and the second strip-shaped hole are arranged in a staggered manner, so that the side plate and the second side plate can tightly hold the skeleton and are stressed uniformly, and side effects caused by uneven holding stress are avoided.

Drawings

FIG. 1 is a schematic view of the overall construction of a bone anchor;

FIG. 2 is an elevation view of a bone anchor;

FIG. 3 is a left side view of the bone anchor;

fig. 4 is a schematic intermediate cross-sectional view of a bone anchor.

100. The stress window comprises a bottom plate, 110, a stress window body, 120, a stop pin, 130, th curved surfaces, 210, th side plates, 211, th holding parts, 212, th strip-shaped holes, 213, th notch grooves, 214, second curved surfaces, 220, second side plates, 221, second holding parts, 222, second strip-shaped holes, 223, second notch grooves, 224 and third curved surfaces.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

it should be noted that when an element is referred to herein as being "fixed" to another elements, it may be directly on the other elements or intervening elements may also be present, when elements are referred to as being "connected" to another elements, it may be directly connected to the other elements or intervening elements may be present.

The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, the term "and/or" as used herein includes any and all combinations of or more of the associated listed items.

As shown in fig. 1 to 4, the bone fixator comprises a fixing body made of absorbable material, the fixing body comprises a bottom plate 100, the bottom plate 100 comprises a side end and a second side end opposite to the 0 side end, a 1 side plate 210, a 2 side plate 210 is arranged at the 3 side end, a 4 side plate 210 is provided with a 5 strip-shaped hole 212, a plurality of 6 strip-shaped holes are arranged at intervals, so that the second 7 side plate 210 forms a fixing claw, a side plate 210 is further provided with a notch groove 213, a notch groove 213 is a non-through groove and is provided with a plurality of intervals, the groove edge of the notch groove 213 extends to the strip-shaped hole 212, a second side plate 220 is arranged at the second side end, the side plate 210 and the second side plate 220 are both arranged at the same side of the bottom plate 100 and are arranged at an included angle with the bottom plate 100, the second side plate 220 is provided with a second notch groove edge, a second notch groove 222 is provided with a plurality of through grooves, and a plurality of notches 223 notches 222 and a notch grooves are not extending to the second notch groove 222, and a plurality of notches 223, so that the second notch grooves are formed.

Through the bottom plate 100, curb plate 210 and the setting of second curb plate 220, bottom plate 100 and the cooperation of skeleton contact, the skeleton is held tightly to stationary dog and second stationary dog, and then realize with the cooperation and the fixed of skeleton, because bottom plate 100, curb plate 210 and second curb plate 220 are formed by the preparation of human absorbable material, the bone fixer is fixed back with the skeleton, by human degradation absorption gradually in bone growth and healing, need not the secondary operation and take out, the stimulation of bone fixer to the impaired position of skeleton is reduced in the setting of notch groove 213 and second notch groove 223, promote the bone to develop fast.

, the bottom plate 100, the side plate 210 and the second side plate 220 are all bodies, as shown in fig. 1-3, the bone fixator is in an inverted U shape, bodies are molded during production and can be directly used after water bath treatment, the structure is simple, the processing is convenient, and the production cost is reduced.

In addition, the absorbable material is degradable and absorbable material, has no harm or side effect, and may be any kinds of chitin, collagen, polylactic acid, polyglycol ester-lactide copolymer, polydioxanone, polycaprolactone and other material or mixed material meeting the requirement as skeleton fixer.

Polylactic acid, called Polylactic acid for short PLA, is a new generation completely degradable high molecular material which is rapidly developed and prosperosed in 90 s of the 20 th century, has excellent biocompatibility and absorbability, is nontoxic and nonirritating, can be completely decomposed under the action of microorganisms, water, acid, alkali and the like in nature, and the final product is CO₂And H₂Meanwhile, lactic acid which is an intermediate product in a human body has no toxicity to the human body, and is approved by the United states Food and Drug Administration (FDA) to be used as biomedical high polymer materials such as degradable stents, drug controlled release carriers, medical operation sutures, internal fracture fixing materials and the like.

The polylactic acid is used for physical and chemical modification, and is made into orthopedic internal fixation objects with different purposes, such as maxillofacial bone fracture plates, rib fracture plates, sternum fracture plates, bone fixing screws and the like through different processing technologies. Because the polylactic acid can be directly absorbed and degraded by a human body, the polylactic acid does not need to be taken out after a subsequent operation, the strength is gradually reduced in the degradation process, and the deformation stress of the polylactic acid material is slowly transferred to the fracture part, thereby stimulating the union of the fracture end. Compared with the stress shielding generated by the traditional metal internal fixation, the bone fixator made of the material can obviously reduce the physiological and psychological burden of a patient.

As shown in fig. 1, 2 and 4, the base plate 100 is provided with stress windows 110 for releasing stress, the stress windows 110 are arranged in through holes, the arrangement of the stress windows 110 can relieve the deformation stress generated when the bone fixator is used, so that the bone fixator cannot be well matched and fixed with the bone after being deformed is avoided, and the matching degree of the bone fixator and the bone is further improved .

The placement of the stress window 110 has the following effect in clinical plastic deformation:

, the two ends of the bone fixer are resisted to be stretched outwards, namely the bottom plate 100 of the bone fixer is stretched towards the side plate 210 direction and the second side plate 220 direction respectively, because the deformation can play a role of fixed obstruction to clinical operation and indirectly narrows the middle width, the stress window 110 is arranged, so that the situation is avoided;

secondly, when the bone fixator is used for shaping in clinical application, shaping stress is released through the stress window 110, so that the upper surface of the bottom plate 100 is prevented from wrinkling;

thirdly, the stress window 110 can be used for being matched with the grasping of a matched instrument, the grasping time of the bone fixator from water bath to the fracture broken end is shortened, the time of the product from a soft state to a solid state is further prolonged, and more time is strived for better fixing and matching with the bone.

On the basis of any embodiments, the width direction and the length direction of the base plate 100 are respectively in the X axial direction and the Y axial direction, the base plate 100 is provided with a curved surface 130, the axial direction of the arc surface of the curved surface 130 in the length direction is the same as the X axial direction, the axial direction of the arc surface of the curved surface 130 in the width direction is the same as the Y axial direction, the curved surface 130 is arranged for better matching and fixing with bones, and the arc surfaces of the curved surface 130 in the X axial direction and the Y axial direction can enable the bone fixator to be matched with bones more tightly through deformed stress when in use, so that a better clinical use effect is achieved.

On the basis of any embodiments, the bone fixator further comprises a second curved surface 214 and a third curved surface 224, wherein the second curved surface 214 is connected with the inner side surface of the side plate 210 and the inner side surface of the bottom plate 100, the axial direction of the arc surface of the second curved surface 214 is the same as the Y axial direction, the third curved surface 224 is connected with the inner side surface of the second side plate 220 and the inner side surface of the bottom plate 100, and the axial direction of the arc surface of the third curved surface 224 is the same as the Y axial direction, the second curved surface 214 and the third curved surface 224 are arranged in a step , so that the edge positions can be well matched and fixed when the bone fixator is fixedly matched with bones, and the influence on bone development is further reduced by the arrangement of the second curved surface 214 and the third curved surface 224, the fixing matching degree is further improved, and bone growth and clinical treatment are.

Further , each connecting part of the bone fixator is provided with an arc curved surface, the arc curved surface is an R arc, the R arc is radian data obtained by performing statistical analysis on radians of different specific bone parts medically, for example, when the bone fixator is cured by clinical rib fixation, the R arc is radian data which is obtained by performing statistical analysis on radians of clinically actual ribs, the radian data is radian data which is obtained by designing and is obtained by taking average data after performing statistical analysis on radians of clinically actual ribs, the radian data is radian data of a second curved surface 214 and radian data of a third curved surface 224, specifically, the radian data of the second curved surface 214 and the radian data of the third curved surface 224 are equal, that is, the arc radius of the second curved surface 214 and the arc radius of the third curved surface 224 are both 25mm to 29mm, the radian data of a Y axial radian data of a curved surface 130, specifically, the radian data is radian data of a th curved surface 130, the arc radius of a th curved surface 130 is 192mm to 195mm, the arc radius of the th curved surface 130 is larger than the arc radius of the second curved surface 214, the third curved surface is , the arc curved surface of the bone fixator is a clinically deformed by a 357 th curved surface, and the arc curved surface of the bone fixator 130, and the clinical rib fixator 130 is more firmly fixed by a clinically-curved surface 3517, and the clinical rib fixator 130, and the clinical rib fixator is more firmly fixed by a water bath, and the arc fixed by a water bath, and the clinical rib fixator 130.

On the basis of any embodiments, as shown in fig. 1 to 4, the -th fixing claw comprises a plurality of -th gripping parts 211, a -th strip-shaped hole 212 is formed between every two adjacent -th gripping parts 211, the thickness of the -th gripping part 211 gradually decreases towards the direction away from the base plate 100, the second fixing claw comprises a plurality of second gripping parts 221, a second strip-shaped hole 222 is formed between every two adjacent second gripping parts 221, and the thickness of the second gripping part 221 gradually decreases towards the direction away from the base plate 100.

For convenience of description, the th slit groove 213 and the second slit groove 223 are collectively called a slit groove, the th slit hole 212 and the second slit hole 222 are collectively called a slit hole, the th gripper 211 and the second gripper 221 are collectively called a gripper, and the th locking pawl and the second locking pawl are collectively called a locking pawl.

As shown in fig. 1 to 4, the fixing claw includes a plurality of grip portions, and the thickness of each grip portion is designed in a gradually-changing size, and the thickness of each grip portion gradually decreases from top to bottom, that is: the deeper the bone fixing position is, the thinner the thickness of the grip part is, so that the thickness of the grip part at the holding position is not increased too much due to the squeezing generated by holding when the grip part holds the diseased bone position or is shaped in the operation, the thickness of the end position of the grip part is minimum, and even if compression or folding is generated, the increase of the thickness is limited, so that side effects on the bone and peripheral tissues are avoided, the suture of wounds is facilitated, the stimulation effect on periosteum is reduced, and the healing of the wounds is facilitated.

, as shown in fig. 1 and 2, the thickness of the grip part is gradually reduced from top to bottom in a way that the plate surface outside the side plate inclines towards the inside, namely, the outer side surface of the grip part is provided with an outward-inclined surface which is arranged from the lower end position of the notch groove, the inclination angle of the outward-inclined surface is 7 degrees, and the thickness of the thinnest position of the end of the grip part is 1 mm.

On the basis of any embodiments, the gripping end of the gripping part 211 and the gripping end of the second gripping part 221 are both arc surfaces, so that the stimulation to the bone can be reduced to the maximum when the gripping ends are tightly held with the bone, particularly, the tightly held parts can also contact with the flesh tissues at the root of the bone, the harm to the human body when the person is tightly held can be greatly reduced, and the clinical treatment effect is improved.

, as shown in fig. 1, 3 and 4, the ends of the holding ends are all arranged in a semicircle shape, and each part of the holding ends are arranged in a circular arc surface.

On the basis of any embodiments, the groove bottom surface of the notch groove 213 is arranged in an inclined plane, so that the wall thickness of the groove bottom of the notch groove 213 is gradually reduced in the direction away from the bottom plate 100, and the groove bottom surface of the second notch groove 223 is arranged in an inclined plane, so that the wall thickness of the groove bottom of the second notch groove 223 is gradually reduced in the direction away from the bottom plate 100. when the bone fixator is deformed in a preheating mode, the notch position of the notch groove 213 and the notch position of the second notch groove 223 can be thickened or folded, so that the difficulty of clinically increasing wound suturing is further caused, stimulation is easily generated on bone tissues, the clinical treatment is not facilitated, the gradually reduced groove bottom wall thickness in the direction away from the bottom plate 100 weakens the thickness increase or folding degree in the preheating deformation use process, the thickness is not increased excessively or the excessive folding is not generated, and the better clinical treatment effect is further achieved.

As shown in fig. 1 and 3, the th notch groove 213 and the second notch groove 223 are thinner, and the inclined surface is arranged to make the thinning become thinner gradually, in the clinical treatment of the rib, the preheating deformation of the water bath is carried out, the grip part is bent according to the section of the rib, at this time, although the grip part is thicker at the st notch groove 213 and the second notch groove 223, the design avoids the excessive thickness of the notch groove, thereby reducing the stimulation to the bone tissue and promoting the development and treatment of the bone.

Specifically, the inclination of the inclined plane of the bottom surface of the -th notch groove 213 is 10-15 degrees, and the inclination of the inclined plane of the bottom surface of the second notch groove 223 is 10-15 degrees.

It should be noted that the th notch groove 213 and the 223 th notch groove are both blind grooves, i.e. through groove grooves, as shown in fig. 1 and 3.

On the basis of any embodiments, as shown in fig. 2 and 4, the base plate 100 is further provided with a stop pin 120 matched with the fracture gap, the stop pin 120 is provided with an inclined plane arranged at an included angle with the base plate 100, at least two stop pins 120 are arranged at intervals, the stop pin 120 is matched with the fracture gap to prevent the fracture gap from expanding, the stop pin 120 is gradually degraded and absorbed in the process of developing and healing of the tissue of the fracture part, so that the stress is gradually reduced, the development degree of the fracture part is improved, the inclined plane on the stop pin 120 is arranged to facilitate the stop pin 120 to directly slide into the fracture gap, and the temporary treatment and operation time is saved.

, the stop pin 120 may be other structures that fit into the fracture gap, such as a post.

For example, in clinical application of ribs, due to physiological respiration, the ribs can expand and contract along the thorax, incomplete fixation often occurs between the bone fixator and the ribs, under the pressure intensity of , the fractured ends can slide and drag, fracture lines can be enlarged, and delayed union of bones can be caused, in this case, the stop pin 120 is designed and matched with a matched special tool in an operation, and when the bone fixator is shaped in the operation, the stop pin 120 slides into the fractured gaps on the bones along the trend so as to realize accurate fixation and matching in steps.

Specifically, as shown in fig. 2 and 4, two stopper pins 120 are provided, the two stopper pins 120 are provided on the lower surface of the base plate 100, and the inclined planes of the stopper pins 120 are designed such that when the bone fixator is subjected to water bath shaping by an operation, the stopper pins 120 on the lower surface of the base plate 100 can slide into fracture gaps, and according to bone clinical data, it is required to ensure that fracture line gaps are within 2mm, therefore, the width of the stopper pins 120 is designed to be 2.5mm, the included angle of the inclined planes of the stopper pins 120 is designed to be 50 °, and the distance between the stopper pins 120 is designed to be 40mm, so that the arrangement not only can satisfy the conditions for forming callus, but also compared with the original completely fixed design, the rigid fixation of the metal fixator is changed into the elastic fixation of the structure, thereby facilitating the formation of callus and promoting the healing of bone.

As shown in FIG. 4, stop pins 120 are respectively arranged on the upper part and the lower part, the inclined plane of the stop pin 120 on the upper part is obliquely arranged towards the upper right side, the inclined plane of the stop pin 120 on the lower part is obliquely arranged towards the lower right side, after the stop pin 120 on the lower part slides into the fracture gap, the split bones at two ends cannot be separated due to the whole action of the bone fixer, the expansion of the fracture gap is avoided , the stop pin 120 is gradually degraded and absorbed in the process of the growth and healing of the fracture position, the stress applied to the fracture gap is gradually reduced, the fracture gap is successfully healed, the abutting of the stop pin 120 on the fracture gap also plays a role in stimulating the growth, and clinical treatment is promoted.

On the basis of any embodiments, the distance between the two stress windows 110 is set to be half of the length of the bottom plate 100, the two stress windows 110 are set at intervals to relieve the plastic deformation stress more uniformly, so that the bone fixator is better matched and fixed with the bone, the matching degree is improved, and the pressure effect which can be generated on the bone by the bone fixator can be reduced by uniform stress.

, the stress window 110 can be arranged in a plurality of ways according to the situation, the stress window 110 is arranged in a circular through hole, the circular through hole is arranged to facilitate the processing and production, the production cost is reduced, and meanwhile, the stress window is convenient to be matched with a matched tool for clamping.

Specifically, as shown in fig. 1, fig. 2 and fig. 4, the stress windows 110 are designed to be circular through holes, the diameter of the circular holes is 3.5mm, the distance between the centers of the circular holes of two adjacent stress windows 110 is L/2, and L is the total length of the base plate 100, and the stress windows 110 are mainly used for releasing stress generated during plastic deformation in clinic. The skeleton fixer warp in the hot water bath, because the curved surface radian position on the skeleton fixer produces opposite stress, if do not have stress window 110 to set up, the skeleton fixer can warp towards the opposite direction of radian in the hot water, causes the consequence of unable clinical use, because stress window 110 to the release of stress and to the effect of alleviating of stress, when moulding deformation in hot water, the skeleton fixer softens along the radian direction to supply clinical normal use.

On the basis of any above embodiments, the bar-shaped holes 212 and the second bar-shaped holes 222 are both arranged in a U shape, the bar-shaped holes 212 and the second bar-shaped holes 222 are arranged in a staggered manner, the bar-shaped holes 212 and the second bar-shaped holes 222 have the same effect as the stress window 110, and the staggered arrangement enables the side plate 210 and the second side plate 220 to tightly clamp bones and to be stressed more uniformly, so that side effects caused by uneven clamping stress are avoided.

As shown in fig. 1, 3 and 4, the th strip-shaped hole 212 and the second strip-shaped hole 222 are not respectively arranged on the th side plate 210 and the second side plate 220 at corresponding positions, but are arranged at staggered positions, so that the th fixing claw and the second fixing claw can firmly hold the bone.

, as shown in fig. 1, 3 and 4, due to the staggered arrangement of the strip-shaped hole 212 and the second strip-shaped hole 222, an avoidance space is formed at both ends of the side plate 210 and the second side plate 220, and the avoidance space can also reduce the stimulation to the bone tissue or other peripheral tissues and reduce the generation of side effects when the calcaneus is attached and fixed by .

When in actual operation, the normal saline is heated to constant temperature, then the constant temperature is kept, the bone fixator is placed in the constant temperature box for 2 minutes, and the bone fixator is taken out after the soft state is changed into the solid state and is placed on a fracture part needing to be fixed for fixation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

bone fixator, comprising a fixing body made of absorbable material for stimulating healing of a fractured end, the fixing body comprising:

a bottom panel including an th lateral end and a second lateral end disposed opposite the th lateral end;

a th side plate, wherein the th side plate is arranged at the 0 th side end, the 1 th side plate is provided with a 2 th strip-shaped hole, the th strip-shaped hole is provided with a plurality of spacing holes to enable the th side plate to form a th fixing claw, the th side plate is also provided with an th notch groove, the th notch groove is an open groove and is provided with a plurality of spacing holes, the groove edge of the th notch groove extends to the th strip-shaped hole, and

the second curb plate, the second curb plate is located the second side, the curb plate with the second curb plate is all located the bottom plate with side and with the bottom plate is the contained angle setting, the second curb plate is equipped with second bar hole, the second bar hole is the interval and is equipped with a plurality ofly, makes the second curb plate forms the second stationary dog, the second curb plate still is equipped with second opening groove, the second opening groove is for not leading to the groove, and be the interval and be equipped with a plurality ofly, the groove edge in second opening groove extends to second bar hole.
2. The bone fixator of claim 1, wherein the base plate is provided with stress windows for stress relief, the stress windows being provided as through holes.
3. The bone fixator of claim 2, wherein the base plate has a width direction and a length direction in an X-axis direction and a Y-axis direction, respectively, the base plate is provided with an th curved surface, the th curved surface has an arc surface in the length direction in the axial direction, and the th curved surface has an arc surface in the width direction in the axial direction, and the Y-axis direction.
4. The bone fixator of claim 3, further comprising a second curved surface and a third curved surface, wherein the second curved surface connects the inner side surface of the th side plate and the inner side surface of the bottom plate, the arc surface of the second curved surface is axially oriented in the same direction as the Y axis, the third curved surface connects the inner side surface of the second side plate and the inner side surface of the bottom plate, and the arc surface of the third curved surface is axially oriented in the same direction as the Y axis.
5. The bone fixator of claim 1, wherein the fixation jaw includes a plurality of grips, each of the grips defining the -shaped slot therebetween, the -shaped grips tapering in thickness away from the base plate, and the second fixation jaw includes a plurality of second grips defining the second-shaped slot therebetween, the second grips tapering in thickness away from the base plate.
6. A bone fixation device as recited in claim 5, wherein the gripping end of the grip and the gripping end of the second grip are each radiused.
7. The bone fixation device of claim 1, wherein said notch groove bottom surface is sloped such that said notch groove bottom wall thickness tapers away from said base plate, and said second notch groove bottom surface is sloped such that said second notch groove bottom wall thickness tapers away from said base plate.
8. The bone fixator of claim 1 wherein the base plate further comprises two stop pins arranged at an angle to the base plate, wherein the two stop pins are arranged at a distance from each other, wherein the two stop pins are arranged on the same side of the base plate, wherein the inclined surfaces of stop pins are inclined towards side, and the inclined surfaces of stop pins are inclined towards another side.
9. The bone fixation device of claim 2, wherein there are two of said stress windows spaced apart, the spacing of the two stress windows being -half the length of said base plate.
10. The bone fixator of wherein the and the second strip holes are both U-shaped, and the and the second strip holes are offset.