CN-120661285-B - Proximal tibia anatomical bone defect cushion block prosthesis

Abstract

The application relates to the technical field of implantation orthopaedics, in particular to a proximal tibia anatomic bone defect cushion block prosthesis, which comprises a cushion block prosthesis structure and a lateral steel plate, wherein the cushion block prosthesis structure comprises an anatomic bone defect cushion block and a sleeve cage structure fixedly arranged at the bottom end of the anatomic bone defect cushion block, and the lateral steel plate is arranged on the lateral surface of the anatomic bone defect cushion block. Through setting up cushion prosthetic structure and side steel sheet, on the basis of the minimum bone that cuts of proximal bone defect of tibia, according to the defective circumstances of inside bone, the anatomic prosthetic of customization anatomic bone defect cushion and taking both sides area cover cage structure can remain normal bone joint face, reduce the bone volume of cutting, keep normal patellar ligament and shin collateral ligament simultaneously, furthest maintains joint function, cushion prosthetic structure and side steel sheet can provide initial stability moreover, and provide structural basis for long-term stability, and, the hollow cover cage structure in both sides can plant the bone, have the bone guiding effect, can promote the formation of new bone.

Inventors

• Cui Miaoxia

Assignees

• 北京力达康科技有限公司

Dates

Publication Date

20260512

Application Date

20250623

Claims (3)

1. 1. The proximal tibia anatomic bone defect cushion block prosthesis comprises a cushion block prosthesis structure (100) and a lateral steel plate (200), and is characterized in that the cushion block prosthesis structure (100) comprises an anatomic bone defect cushion block (101) and a sleeve cage structure (102) fixedly arranged at the bottom end of the anatomic bone defect cushion block (101), and the lateral steel plate (200) is arranged on the lateral surface of the anatomic bone defect cushion block (101); The bone fracture fixation device comprises an anatomic bone fracture cushion block (101), wherein a first mounting hole is formed in the surface of the anatomic bone fracture cushion block (101), a first fixing screw (300) used for fixing the anatomic bone fracture cushion block (101) and bone is arranged on the inner wall of the first mounting hole, a second mounting hole is formed in the surfaces of a side steel plate (200) and the anatomic bone fracture cushion block (101), a second fixing screw (400) used for fixing the side steel plate (200) and the anatomic bone fracture cushion block (101) is arranged on the inner wall of the second mounting hole, a third mounting hole is formed in the surface of the side steel plate (200), and a third fixing screw (500) used for fixing the side steel plate (200) and the bone is arranged on the inner wall of the third mounting hole; The connecting mechanism (600) is arranged between the side steel plate (200) and the anatomic bone defect cushion block (101) and is used for rapidly connecting the side steel plate (200) and the anatomic bone defect cushion block (101), the connecting mechanism (600) comprises a rectangular sliding groove (601) formed in the surface of the anatomic bone defect cushion block (101) and a rectangular sliding block (602) arranged on the inner wall of the rectangular sliding groove (601) in a sliding manner, an inserting block (603) is fixedly arranged on the surface of the side steel plate (200), and an inserting groove (604) matched with the inserting block (603) is formed in the surface of the rectangular sliding block (602); Two symmetrical limiting rods (605) are fixedly arranged on the inner wall of the rectangular chute (601), and two sliding holes which are respectively connected with the outer surfaces of the two limiting rods (605) in a sliding manner are formed in the surface of the rectangular sliding block (602); The inner wall of the inserting groove (604) is provided with a pressing plate (607) in a sliding manner, the outer surface of the pressing plate (607) is fixedly provided with two symmetrical pressing blocks (608), the inner wall of the inserting groove (604) is provided with pressing grooves (609) which are respectively connected with the outer surfaces of the two pressing blocks (608) in a sliding manner, the inner wall of the pressing groove (609) is fixedly provided with a telescopic airbag (6010), and the telescopic end of the telescopic airbag (6010) is fixedly connected with the surfaces of the pressing blocks (608); The two-side inner walls of the plug-in groove (604) are provided with sealing cavities (6011), the inner walls of the sealing cavities (6011) are provided with sealing positioning blocks (6012) in a sliding mode, the surfaces of the two telescopic air bags (6010) are provided with first inflation pipes which extend to the interiors of the two sealing cavities (6011) respectively, and the surfaces of the plug-in blocks (603) are provided with positioning grooves (6013) which are matched with the sealing positioning blocks (6012); a first reset spring (6014) is fixedly arranged on the inner bottom wall of the telescopic air bag (6010), the other end of the first reset spring (6014) is fixedly connected with the inner top wall of the telescopic air bag (6010), a second reset spring (6015) is fixedly arranged in the sealing cavity (6011), and one end, far away from the inner wall of the sealing cavity (6011), of the second reset spring (6015) is fixedly connected with the surface of the sealing positioning block (6012); four threaded counter bores are formed in the surface of the side steel plate (200) in a rectangular array, and inner walls of the four threaded counter bores are connected with inner hexagonal locking bolts (606) in a threaded mode; The surface of the anatomic bone defect cushion block (101) is provided with a sealing assembly (700) for sealing the rectangular sliding groove (601), the sealing assembly (700) comprises a rectangular inflatable air bag (701) fixedly arranged on the inner bottom wall of the insertion groove (604), the top end of the rectangular inflatable air bag (701) is fixedly connected with the lower surface of the pressing plate (607), and a third reset spring (702) is fixedly arranged on the inner top wall and the inner bottom wall of the rectangular inflatable air bag (701); The sealing assembly (700) further comprises an annular groove which is formed in the surface of the anatomic bone defect cushion block (101) and corresponds to the rectangular sliding groove (601), an annular inflation air bag (703) is fixedly arranged on the inner wall of the annular groove, and a second inflation tube which extends to the inside of the annular inflation air bag (703) is arranged on the surface of the rectangular inflation air bag (701).
2. 2. The proximal tibial anatomic bone defect spacer prosthesis of claim 1, wherein the top of said anatomic bone defect spacer (101) is provided with a ten degree retroverted angle.
3. 3. The proximal tibial anatomic bone defect spacer prosthesis of claim 2, wherein said anatomic bone defect spacer (101) is of T-type configuration and said anatomic bone defect spacer (101) is of solid configuration for ensuring the strength of the spacer prosthesis configuration (100).

Description

Proximal tibia anatomical bone defect cushion block prosthesis Technical Field The application relates to the technical field of implantation orthopaedics, in particular to a proximal tibia anatomical bone defect cushion block prosthesis. Background Knee bone defects can be caused by a number of causes, including joint deformity, condylar dysplasia, ischemic necrosis, trauma, post-tibial plateau osteotomies, and knee revision surgery. In existing knee replacement surgery, bone defects are typically treated by filling with bone cement, grafting bone, and using custom-made prostheses. The method has different defects, namely, the bone cement filling mode is characterized in that the bone cement has poor mechanical property and is not suitable for patients with serious bone defects, the bone grafting is divided into autogenous bone and allogeneic bone, the autogenous bone is limited in material selection, the allogeneic bone is easy to cause bone grafting failure due to safety and other uncertain factors, and the customized prosthesis is often used for patients with serious bone defects, and the bone excision amount is large, so that the joint mobility is limited. Accordingly, the prior art has the following drawbacks: 1. The existing bone defect has larger bone cutting quantity; 2. the sharp edge of the existing bone defect cushion block is easy to cause soft tissue pain; 3. most of the existing bone defect cushion blocks are of a bone trabecular structure, and the overall strength is low; 4. most of the cushion block prostheses at present lack of biological fixation structures, and bone ingrowth effect is poor. To this end, the present application provides a proximal tibial anatomic bone defect spacer prosthesis. Disclosure of Invention The object of the present application is to solve at least one technical problem set forth in the background art. The application provides a proximal tibia anatomic bone defect cushion block prosthesis, which comprises a cushion block prosthesis structure and a lateral steel plate, wherein the cushion block prosthesis structure comprises an anatomic bone defect cushion block and a sleeve cage structure fixedly arranged at the bottom end of the anatomic bone defect cushion block, and the lateral steel plate is arranged on the lateral surface of the anatomic bone defect cushion block; The surface of the anatomic bone defect cushion block is provided with a first mounting hole, the inner wall of the first mounting hole is provided with a first fixing screw used for fixing the anatomic bone defect cushion block and bone, the surfaces of the lateral steel plate and the anatomic bone defect cushion block are provided with a second mounting hole, the inner wall of the second mounting hole is provided with a second fixing screw used for fixing the lateral steel plate and the anatomic bone defect cushion block, the surface of the lateral steel plate is provided with a third mounting hole, and the inner wall of the third mounting hole is provided with a third fixing screw used for fixing the lateral steel plate and bone. Through adopting above-mentioned technical scheme, on the basis of the minimum bone that cuts of proximal bone defect of tibia, according to the defective condition of inside bone, the defective cushion of customized anatomical bone and take the anatomical prosthesis of both sides area cover cage structure, can remain normal bone joint face, reduce the bone volume of cutting, keep normal patella ligament and shin collateral ligament simultaneously, furthest maintain joint function, cushion prosthetic structure and side steel sheet can provide initial stability moreover, and provide structural basis for long-term stability, and, the hollow cover cage structure in both sides can carry out the bone grafting, have the bone guiding effect, can promote the formation of new bone. Preferably, the top of the anatomic bone defect spacer is provided with a backward tilting angle of ten degrees. By adopting the technical scheme, the fitting degree of the top of the anatomic bone defect cushion block and the bone is improved. Preferably, the anatomic bone defect cushion block is of a T-shaped structure, and the anatomic bone defect cushion block is of a solid structure. By adopting the technical scheme, the cushion block prosthesis structure is used for guaranteeing the strength of the cushion block prosthesis structure. Preferably, a connecting mechanism is arranged between the side steel plate and the anatomic bone defect cushion block and used for quickly connecting the side steel plate with the anatomic bone defect cushion block, the connecting mechanism comprises a rectangular chute arranged on the surface of the anatomic bone defect cushion block and a rectangular sliding block arranged on the inner wall of the rectangular chute in a sliding manner, an inserting block is fixedly arranged on the surface of the side steel plate, and an inserting groove matched with the insertin