CN212521983U - Bone cement removing tool in knee joint replacement - Google Patents

Abstract

The embodiment of the utility model discloses bone cement cleaing away instrument in knee joint replacement art, concretely relates to artifical knee joint bone cement type false body replacement technical field, including the tweezers main part, the tweezers main part comprises first tong arm and second tong arm, the one end of one side that nerve was kept away from to first tong arm and second tong arm is all fixed and is equipped with the holding head, the inside of first tong arm and second tong arm is the cavity form and its lateral wall has all seted up the spout, two insert between the spout and be equipped with same connecting rod, the both ends of connecting rod are fixed respectively and are equipped with first long and thin centre gripping handle and the long and thin centre gripping handle of second. The utility model discloses in, this kind of instrument structure associativity is stronger, can clear up remaining bone cement around the false body fast effectively, and in addition, shape structural design's adaptation user of service is handheld, and it is comparatively convenient to operate, can improve the efficiency of artifical knee joint replacement operation.

Description

Bone cement removing tool in knee joint replacement

Technical Field

The embodiment of the utility model provides a bone cement instrument of cleaing away in knee joint replacement technique field, concretely relates to knee joint replacement technique is related to artificial knee joint bone cement type false body replacement technical field.

Background

Bone cement, the essential component is polymethyl methacrylate, and present mainstream total knee joint replacement, unicondylar replacement, patellofemoral joint replacement all use bone cement as fixed medium, currently, do not have unified, standardized bone cement clearance instrument clinically, mostly will regard as substituting to carry out the clearance work with "scalpel, hemostatic forceps, tweezers and electrotome head" etc. in the art, above common tool is mostly metallic texture, and shape, thickness, length are inconvenient to use. In the process of removing residual bone cement, the residual bone cement is often left in the body due to inconvenient cleaning, improper tools and the like, or the high-polishing surface of the prosthesis is scratched, remains marks and the like;

at present, widely used bone cement has limited hardening and shaping fixing time, 12-15 minutes are averagely needed from an initial soft plastic state to complete hardening and shaping after room-temperature bone cement solvent and solute start to be mixed, the use of a residual bone cement cleaning tool is inconvenient in the prosthesis placing process, extra prosthesis placing time is invisibly added under many special conditions, and the scratch damage of the high-light surface of the prosthesis is often caused by 'time snatching' by doctors, carelessness and the like in the operation process.

In order to improve the efficiency of the artificial knee joint replacement operation, the placing time of the artificial prosthesis is effectively saved in the limited hardening time of the bone cement, and the placing process is effectively protected from damaging the prosthesis, a special bone cement removing tool is provided, so that the residual bone cement can be easily removed, and damage and scratch of the high optical surface of the prosthesis can not be caused even if the surface of the prosthesis is touched carelessly.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a bone cement removal tool in knee joint replacement, through the clamping head that sets up, first long and thin centre gripping handle, the long and thin centre gripping handle of second and nerve are shelled, can realize well not solidifying, spill over the bone cement around the false body and cut, carry out the centre gripping and persist in the deeper, the bone cement bits of narrow and small position to the remaining bone cement that has cut down and clear up, and simultaneously, this kind of instrument structure associativity is stronger, can clear up remaining bone cement around the false body fast effectively, and in addition, the adaptation user of shape structural design is handheld, and it is comparatively convenient to operate, can improve the efficiency of artifical knee joint replacement operation, in order to solve current instrument in remaining bone cement clearance process, often because of clear up inconvenience, the instrument is improper etc. causes unnecessary bone cement to remain in vivo, or the high polishing surface scratch of false body, Leaving a mark and the like.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: a bone cement removing tool in knee joint replacement comprises a forceps main body, wherein the forceps main body is composed of a first forceps arm and a second forceps arm, a nerve stripper is fixedly connected to the outer side wall of one side of the forceps main body, clamping heads are fixedly arranged at one ends of the first forceps arm and the second forceps arm, the sides of the first forceps arm and the second forceps arm are far away from the nerve stripper, the interiors of the first forceps arm and the second forceps arm are hollow, sliding grooves are formed in the outer side walls of the first forceps arm and the second forceps arm, a same connecting rod is inserted between the two sliding grooves, sliding rings are fixedly sleeved at the end portions of the two ends of the connecting rod, a first long and thin clamping handle and a second long and thin clamping handle are fixedly arranged at the two ends of the connecting rod respectively, the first long and thin clamping handle and the second long thin clamping handle are correspondingly arranged in the hollow structures of the first forceps arm and the second forceps arm respectively, through holes are transversely formed in the interiors of the two clamping heads, and the end portions of the first long and, and fastening bulges are fixedly arranged in the two sliding grooves.

Furthermore, the sleeving parts of the first elongated clamping handle and the second elongated clamping handle and the connecting rod are respectively provided with a gasket.

Furthermore, the outer sides of the first forceps arm and the second forceps arm are respectively provided with a first handheld portion and a second handheld portion at two sides of the sliding groove, and the first forceps arm, the second forceps arm and the connecting rod are made of medical stainless steel.

Furthermore, two the material of clamping head all chooses polytetrafluoroethylene material for use, and the opposite face of two clamping heads all is equipped with dentate clamping face.

Furthermore, a clamping groove is formed in the outer side wall of one side of the forceps main body, and a clamping block embedded in the clamping groove is fixedly arranged at one end of the nerve dissector.

Furthermore, an embedding seat and an embedding block which can be embedded with each other are fixedly arranged on the first holding part respectively positioned on the first clamp arm and the second clamp arm.

Furthermore, the nerve dissector is made of polytetrafluoroethylene.

Furthermore, the whole outer parts of the first handheld part and the second handheld part are provided with anti-skid surfaces in a pattern shape.

The embodiment of the utility model provides a have following advantage:

1. through the clamping head that sets up, first long and thin centre gripping handle, the long and thin centre gripping handle of second and nerve are peeled off, can realize well not solidifying yet, spill over the bone cement around the false body and cut, carry out the centre gripping and persist in deeper department to the remaining bone cement that has cut down, the bone cement at narrow and small position is garrulous to be cleared up, and simultaneously, this kind of instrument structure associativity is stronger, can clear up remaining bone cement around the false body fast effectively, in addition, shape structural design's adaptation user of personnel is handheld, the operation is comparatively convenient, can improve the efficiency of artifical knee joint replacement operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic view of an overall structure provided in embodiment 1 of the present invention;

fig. 2 is an exploded view provided in embodiment 1 of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 1 according to embodiment 1 of the present invention;

fig. 4 is an enlarged view of a structure of a portion B in fig. 1 according to embodiment 1 of the present invention;

fig. 5 is a perspective view of a nerve dissector provided in embodiment 1 of the present invention;

in the figure: 1. a forceps body; 2. a first clamp arm; 3. a second jawarm; 4. a first hand-held section; 5. a second hand-held section; 6. nerve dissectors; 7. a clamping head; 8. a slip ring; 9. a connecting rod; 10. a gasket; 11. embedding a base; 12. an insert block; 13. a chute; 14. a first elongated clamping bar; 15. a second elongated clamping bar; 16. a through hole; 17. a toothed clamping surface; 18. a fastening projection; 19. and (7) clamping blocks.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1-5 in the specification, the bone cement removing tool in knee joint replacement of the embodiment comprises a forceps main body 1, and the forceps main body 1 comprises a forceps main body 1, the forceps main body 1 is composed of a first forceps arm 2 and a second forceps arm 3, a nerve dissector 6 is fixedly connected to the outer side wall of one side of the forceps main body 1, one ends of the first forceps arm 2 and the second forceps arm 3, which are far away from the nerve dissector 6, are respectively and fixedly provided with a clamping head 7, the first forceps arm 2 and the second forceps arm 3 are hollow, the outer side walls of the first forceps arm 2 and the second forceps arm 3 are respectively provided with a sliding chute 13, a same connecting rod 9 is inserted between the two sliding chutes 13, the end parts of the connecting rod 9 are respectively and fixedly sleeved with a sliding ring 8, the two ends of the connecting rod 9 are respectively and fixedly provided with a first elongated clamping handle 14 and a second elongated clamping handle 15, the first elongated clamping handle 14 and the second elongated clamping handle 15 are respectively and correspondingly arranged in the hollow structures of the first, through holes 16 are transversely formed in the two clamping heads 7, the end parts of the first long and thin clamping handle 14 and the second long and thin clamping handle 15 correspondingly extend into the two through holes 16 respectively, and fastening protrusions 18 are fixedly arranged in the two sliding grooves 13.

Further, the sleeving parts of the first elongated clamping handle 14 and the second elongated clamping handle 15 and the connecting rod 9 are provided with washers 10, so that the stability of the structure between the first elongated clamping handle 14 and the connecting rod 9 and the structure between the second elongated clamping handle 15 and the connecting rod 9 are ensured.

Further, the outside of first tong arm 2 and second tong arm 3 is equipped with first handheld portion 4 and the handheld portion 5 of second respectively in the both sides of spout 13, medical stainless steel material is all chooseed for use to the material of first tong arm 2 and second tong arm 3 and connecting rod 9, and multiplicable instrument whole weight to the reinforcing is gripped and is felt, and stainless steel material self has certain elasticity and can guarantee that first tong arm 2 and second tong arm 3 press close to mutually and be had better resilience, has guaranteed the effect of centre gripping.

Furthermore, the two clamping heads 7 are made of polytetrafluoroethylene materials, and tooth-shaped clamping surfaces 17 are arranged on opposite surfaces of the two clamping heads 7.

Furthermore, a clamping groove is formed in the outer side wall of one side of the forceps main body 1, and a clamping block 19 embedded with the clamping groove is fixedly arranged at one end of the nerve dissector 6.

Further, an insert seat 11 and an insert block 12, which can be fitted to each other, are fixedly attached to the first hand-held portion 4 provided on each of the first and second forceps arms 2 and 3.

Furthermore, the nerve dissector 6 is made of polytetrafluoroethylene.

Furthermore, the whole outer parts of the first handheld part 4 and the second handheld part 5 are provided with anti-slip surfaces in a pattern shape, so that the handheld operation is convenient.

The implementation scenario is specifically as follows: during the replacement operation of the artificial knee joint bone cement type prosthesis, the tool can be used for cutting bone cement which is not solidified and overflows around the prosthesis, clamping residual bone cement which is cut off and cleaning broken bone cement reserved at a deep and narrow part, the specific operation is as follows, after the clamping block 19 at one end of the matched nerve dissector 6 is embedded corresponding to the clamping groove at one end of the forceps main body 1 according to the cutting requirement, the structures of the first forceps arm 2 and the second forceps arm 3 are ensured to be unified, at the moment, the first forceps arm 2 and the second forceps arm 3 are mutually embedded through the embedding seat 11 and the embedding block 12 arranged on the first handheld part 4 on the first forceps arm, so that the first forceps arm 2 and the second forceps arm 3 are not opened, at the moment, the first forceps arm 2 and the second handheld part 5 on the second forceps arm 3 are held by hands, then the part with a sharp end part of the nerve dissector 6 is used for cutting and scraping the bone cement which overflows around the prosthesis, then, the embedded seat 11 and the embedded block 12 are released from the embedded state, the first handheld portion 4 on the first tong arm 2 and the second tong arm 3 is held by hands, the two oppositely arranged clamping heads 7 arranged at the end portions of the first tong arm 2 and the second tong arm 3 clamp the cut residual bone cement, the opposite surfaces of the two clamping heads 7 are provided with toothed clamping surfaces 17 which are beneficial to the effective clamping of the bone cement, meanwhile, the shape of the clamping heads 7 is set to be elliptical, the shape is slightly wide, the clamping is stable, the unstable clamping state is not easy to occur, then, when the bone cement at the narrow position is cleaned, firstly, the connecting rod 9 is pushed to enable the sliding rings 8 arranged at the two ends of the connecting rod 9 to slide in the sliding groove 13, until the position of the connecting rod 9 passes over the fastening bulge 18 on the sliding groove 13, the fastening bulge 19 limits the connecting rod 9, so that the connecting rod 9 and the sliding rings 8 are positioned in the space between the fastening bulge 18 and the inner side wall of the sliding, then the first handheld part 4 on the first forceps arm 2 and the second forceps arm 3 is held by hands, the first forceps arm 2 and the second forceps arm 3 are pinched to enable the first forceps arm 2 and the second forceps arm 3 to be close to each other, so that the first slender clamping handle 14 and the second slender clamping handle 15 on the end parts of the first forceps arm 2 and the second forceps arm 3 are close to each other, meanwhile, the slender clamping handles of the first slender clamping handle 14 and the second slender clamping handle 15 can well clean bone cement fragments at narrow parts, the tool is strong in structural combination, residual bone cement around the prosthesis can be cleaned quickly and effectively, meanwhile, the tool is convenient for a user to hold the tool, and operation is convenient.

The working principle is as follows:

referring to the attached drawings 1-5 of the specification, a second holding part 5 on a first forceps arm 2 and a second forceps arm 3 is held by hands, then bone cement overflowing around a prosthesis is cut and scraped by utilizing a sharp part at the end part of a nerve stripper 6, then an embedding seat 11 and an embedding block 12 are removed from an embedding state, the first holding part 4 on the first forceps arm 2 and the second forceps arm 3 is held by hands, the cut residual bone cement is clamped by two oppositely arranged clamping heads 7 arranged at the end parts of the first forceps arm 2 and the second forceps arm 3, tooth-shaped clamping surfaces 17 are arranged on the opposite surfaces of the two clamping heads 7 to be beneficial to effective clamping of the bone cement, then when bone cement at a narrow part is cleaned, firstly, a connecting rod 9 is pushed to enable sliding rings 8 arranged at the two ends of the connecting rod 9 to slide in a sliding groove 13 until the position of the connecting rod 9 passes over a fastening bulge 18 on the sliding groove 13, the fastening protrusion 18 is used for limiting the connecting rod 9, the connecting rod 9 and the sliding ring 8 are located in a space between the fastening protrusion 18 and the inner side wall of the sliding groove 13, at the moment, the clamping handles of the first long and thin clamping handle 14 and the second long and thin clamping handle 15 are long and thin, the bone cement at narrow and small positions can be cleaned well, the tool structure is high in combinability, residual bone cement around the prosthesis can be cleaned quickly and effectively, meanwhile, the tool is convenient to use and is handheld by a user, and operation is convenient.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. A bone cement removal tool in knee joint replacement surgery, includes tweezers main part (1), its characterized in that: the forceps comprise a forceps main body (1) and a forceps main body, wherein the forceps main body (1) is composed of a first forceps arm (2) and a second forceps arm (3), a nerve stripper (6) is fixedly connected to the outer side wall of one side of the forceps main body (1), clamping heads (7) are fixedly arranged at one ends of the sides, away from the nerve stripper (6), of the first forceps arm (2) and the second forceps arm (3), the interiors of the first forceps arm (2) and the second forceps arm (3) are hollow, sliding grooves (13) are formed in the outer side walls of the first forceps arm and the second forceps arm, a same connecting rod (9) is inserted between the two sliding grooves (13), sliding rings (8) are fixedly arranged at the end portions of two ends of the connecting rod (9), a first long and thin clamping handle (14) and a second long and thin clamping handle (15) are fixedly arranged at two ends of the connecting rod (9), the first long and thin clamping handle (14) and the second long clamping handle (15) are correspondingly arranged in the hollow structures of the first forceps arm (2, through-hole (16) have transversely been seted up along the inside of two centre gripping head (7), the tip of first long and thin centre gripping handle (14) and the long and thin centre gripping handle of second (15) corresponds respectively and stretches into two through-holes (16), two the inside of spout (13) all is fixed to be equipped with fastening arch (18).

2. The bone cement removal tool in a knee replacement procedure of claim 1, wherein: and gaskets (10) are arranged at the sleeving positions of the first elongated clamping handle (14) and the second elongated clamping handle (15) and the connecting rod (9).

3. The bone cement removal tool in a knee replacement procedure of claim 1, wherein: the medical forceps are characterized in that a first handheld portion (4) and a second handheld portion (5) are arranged on the outer sides of the first forceps arm (2) and the second forceps arm (3) and located on two sides of the sliding groove (13), and the first forceps arm (2), the second forceps arm (3) and the connecting rod (9) are made of medical stainless steel.

4. The bone cement removal tool in a knee replacement procedure of claim 1, wherein: the two clamping heads (7) are made of polytetrafluoroethylene materials, and tooth-shaped clamping surfaces (17) are arranged on opposite surfaces of the two clamping heads (7).

5. The bone cement removal tool in a knee replacement procedure of claim 1, wherein: the outer side wall of one side of the forceps main body (1) is provided with a clamping groove, and one end of the nerve dissector (6) is fixedly provided with a clamping block (19) embedded with the clamping groove.

6. A bone cement removal tool in knee replacement surgery according to claim 3, characterized in that: an embedded seat (11) and an embedded block (12) which can be embedded with each other are fixedly arranged on the first handheld part (4) respectively positioned on the first forceps arm (2) and the second forceps arm (3).

7. The bone cement removal tool in a knee replacement procedure of claim 1, wherein: the nerve dissector (6) is made of polytetrafluoroethylene.

8. A bone cement removal tool in knee replacement surgery according to claim 3, characterized in that: the outer whole of the first handheld part (4) and the second handheld part (5) is provided with a pattern-shaped anti-slip surface.

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