9 results about "Revision Surgeries" patented technology

An implant removal tool designed for efficient and precise removal of an acetabular cup or similar implants is disclosed. The tool includes an outer shaft and an internal shaft configured to move relative to the outer shaft. The internal shaft is operably connected to a cutting assembly comprising multiple inwardly curving, wedge-shaped blades. The blades transition from a retracted position to a closed position, forming a semicircular cutting path slightly larger than the outer diameter of the implant. This configuration allows for controlled rotation of the blades around the implant's outer surface, effectively severing surrounding bone while minimizing damage to adjacent bone and soft tissues. The tool may include interchangeable components to accommodate implants of varying sizes, ensuring adaptability across surgical scenarios. Additional features, such as a helical thread mechanism or drill compatibility, enhance usability and precision during revision surgeries.

The subtalar joint prosthesis comprises a talus assembly, a gasket and a calcaneus assembly, and the talus assembly and the calcaneus assembly are connected through the gasket to form a joint structure; by means of the split structure of the talus assembly, the gasket and the calcaneus assembly, all the assemblies are detachably clamped, step-by-step implantation and assembly in the operation process are facilitated, and therefore the adaptability of the prosthesis under different anatomical conditions is improved. The gasket is arranged between the talus assembly and the calcaneus assembly, a relative motion interface is formed between the talus assembly and the calcaneus assembly, the gasket is made of the low-friction material, direct friction between metal assemblies can be effectively reduced, abrasion is reduced, and the joint movement performance is improved. By means of the structural design, dependence of prosthesis implantation on accurate matching of bone surfaces is reduced, surgical operation is simplified, and meanwhile a feasible solution is provided for rebuilding after joint fusion operation.

This invention comprises base plate and glenosphere designs, as well as cutting guides and holder instruments, developed to provide stronger fixation with a more minimally invasive approach to the shoulder in patients undergoing reverse shoulder arthroplasty for any reason. This newly developed technique allows for surgical operation in a more confined space, particularly in challenging cases such as tight shoulders. In addition, it offers advantages such as being usable as an alternative technique in osteoporotic patients with high cortical fixation and in revision surgeries or in cases with reduced bone stock due to various reasons. In standard base plate designs, it is known that fixation is predominantly achieved in the trabecular bone by screws inserted from the reamed peripheral bone surface surrounding the implant. However, in osteoporotic patients, trabecular bone becomes weakened and the bone stock may not provide sufficient support. Furthermore, version differences related to anatomical variations of the glenoid seen among patients may cause problems in component placement and screw insertion if proper preoperative assessment is not performed. Moreover, in classical component design, in order to send the guidewire in the correct direction corresponding to the surface where the central peg will be applied, soft tissue dissection exposing the entire glenoid must be performed. Performing this dissection may pose challenges for the surgeon in tight shoulders, increase the duration of surgery, and carry risks of complications such as instability or injury to neurovascular structures. In addition, in classical component design, the acceptable threshold of contact between the glenoid and base plate is considered to be 80%. If this is not achieved, implant failure may occur after prosthesis application. When the contact surface between the glenoid and base plate falls below 50%, graft application becomes indicated. Although it is a successful method, it is technically demanding, and in cases of graft non-union, alternative options are limited. Another method is the use of augment components for the defective area. This application not only presents high technical difficulty but also requires well-prepared three-dimensional preoperative planning. Custom-made implants are another option and are technically the most laborious and expensive to manufacture. With this invention, compared to previous techniques, the management of glenoid defect and excessive version problems can be achieved by providing higher cortical fixation with anterior-weighted support.

An implant removal tool designed for efficient and precise removal of an acetabular cup or similar implants is disclosed. The tool includes an outer shaft and an internal shaft configured to move relative to the outer shaft. The internal shaft is operably connected to a cutting assembly comprising multiple inwardly curving, wedge-shaped blades. The blades transition from a retracted position to a closed position, forming a semicircular cutting path slightly larger than the outer diameter of the implant. This configuration allows for controlled rotation of the blades around the implant's outer surface, effectively severing surrounding bone while minimizing damage to adjacent bone and soft tissues. The tool may include interchangeable components to accommodate implants of varying sizes, ensuring adaptability across surgical scenarios. Additional features, such as a helical thread mechanism or drill compatibility, enhance usability and precision during revision surgeries.

The invention relates to the technical field of orthopedic surgical instruments, in particular to a femoral marrow cavity cushion block for rebuilding, an implanting device and an implanting method. The femoral medullary cavity cushion block comprises a first wedge block and a second wedge block, when the wedge faces of the first wedge block and the second wedge block abut against each other, the opposite faces are arc faces, and the arc faces of the first wedge block and the second wedge block are matched with the medullary cavity wall and provided with guide structures. The implanter comprises a fixing base, a first detachable guide plate and a second detachable guide plate, the fixing base is configured to be matched with the femur of a patient and installed at the preset position in the unique positioning posture, the guide plates are matched with the guide structure through a matching structure, and the first wedge block and the second wedge block can be guided into a bone defect area in the first preset posture and the second preset posture. Through cooperation of the split type wedge-shaped cushion block and the special implanter and guide positioning of the guide plate, precise implantation of the cushion block in a bone defect area is achieved, the fitting degree of the cushion block and the medullary cavity wall and the overall structure stability are improved, implantation deviation is reduced, reliable support is provided for a femoral stem prosthesis, and the revision operation effect and long-term safety are guaranteed.

A surgical assistance system may obtain a pre-revision model of a bone of a patient. The pre-revision model of the bone represents a pre-revision state of the bone after a prior orthopedic surgery on the bone. In this example, an orthopedic prosthesis was attached to the bone during the prior orthopedic surgery. Additionally, the surgical assistance system may obtain intra-revision imaging data of the bone. The intra-revision imaging data represents an intra-revision state of the bone during the orthopedic revision surgery after removal of the orthopedic prosthesis from the bone. The surgical assistance system may determine, based on the intra revision imaging data, damaged and intact parts of the bone. The surgical assistance system may then generate a second intra-revision model of the bone by modifying the pre-revision model of the bone to exclude damaged parts of the bone.

An implant removal tool designed for efficient and precise removal of an acetabular cup or similar implants is disclosed. The tool includes an outer shaft and an internal shaft configured to move relative to the outer shaft. The internal shaft is operably connected to a cutting assembly comprising multiple inwardly curving, wedge-shaped blades. The blades transition from a retracted position to a closed position, forming a semicircular cutting path slightly larger than the outer diameter of the implant. This configuration allows for controlled rotation of the blades around the implant's outer surface, effectively severing surrounding bone while minimizing damage to adjacent bone and soft tissues. The tool may include interchangeable components to accommodate implants of varying sizes, ensuring adaptability across surgical scenarios. Additional features, such as a helical thread mechanism or drill compatibility, enhance usability and precision during revision surgeries.

An implant removal tool designed for efficient and precise removal of an acetabular cup or similar implants is disclosed. The tool includes an outer shaft and an internal shaft configured to move relative to the outer shaft. The internal shaft is operably connected to a cutting assembly comprising multiple inwardly curving, wedge-shaped blades. The blades transition from a retracted position to a closed position, forming a semicircular cutting path slightly larger than the outer diameter of the implant. This configuration allows for controlled rotation of the blades around the implant's outer surface, effectively severing surrounding bone while minimizing damage to adjacent bone and soft tissues. The tool may include interchangeable components to accommodate implants of varying sizes, ensuring adaptability across surgical scenarios. Additional features, such as a helical thread mechanism or drill compatibility, enhance usability and precision during revision surgeries.

Systems and methods for planning and performing image free implant revision surgery are discussed. For example, a method for generating a revision plan can include collecting pre-defined parameters characterizing a target bone, generating a 3D model, collecting a plurality of surface points, and generating a reshaped 3D model. Generating the 3D model of the target bone can be based on a first portion of the pre-defined parameters. Generating the reshaped 3D model can be done based on the plurality of surface points collected from a portion of the surface of the target bone.