13 results about "Reverse shoulder" patented technology

A reverse shoulder system can include, for example, a glenoid baseplate comprising a longitudinal axis, the glenoid baseplate further including a stem and a central channel within a sidewall of the stem. The stem can include a longitudinal axis. The longitudinal axis of the glenoid baseplate can be angled with respect to the longitudinal axis of the stem, wherein the longitudinal axis of the glenoid baseplate is not perpendicular with respect to the longitudinal axis of the stem. Other components including a glenosphere, tools, and methods of use are also disclosed.

A humeral anchor for a shoulder prosthesis is disclosed. The humeral anchor includes a distal portion configured to be anchored in a proximal region of a humerus and a proximal portion, the proximal portion including a proximal face, where the proximal face includes an engagement feature configured to directly couple to a reverse shoulder insert having a concave proximal portion, and wherein the proximal face is further configured to directly couple with an anatomical shoulder insert having a convex proximal portion.

The utility model discloses a reverse shoulder joint prosthesis connecting piece which comprises a main installation assembly, a positioning assembly is arranged on one end face of the main installation assembly, a plurality of main fixing assemblies are arranged on the main installation assembly, and a connecting assembly is arranged on the end face, away from the positioning assembly, of the main installation assembly. And a shoulder glenoid ball head is arranged on the connecting assembly. The reverse shoulder joint prosthesis connecting piece has the advantages that the reverse shoulder joint prosthesis connecting piece is used for prosthesis replacement of the shoulder blade side in reverse shoulder joint replacement and treatment of rotator cuff injuries, the occurrence of shoulder blade lower incisura can be effectively prevented, and meanwhile different eccentric shafts can be selected when the reverse shoulder joint prosthesis connecting piece is matched with different patient conditions.

The utility model discloses a shoulder glenoid side guide plate for reverse shoulder joint replacement, which is provided with an attaching surface attached to the surface of a glenoid and a shell surface for driving to rotate, the guide plate comprises a base body and at least three positioning blocks annularly arranged on the periphery of the base body, and the positioning blocks all convexly extend towards the attaching surface. The base body is provided with an attachment surface and a positioning block, the attachment surface is provided with an attachment area for accommodating a glenoid cavity, the positioning block is provided with a plurality of gear parts facing the attachment area, the glenoid cavity is limited in the attachment area by the plurality of gear parts, one side of the shell surface of the base body is provided with a positioning column extending outwards, and the positioning column penetrates through the attachment area and forms a first needle hole. According to the glenoid cavity reamer, the shell face is rotated so that the multiple gear parts can limit the glenoid cavity to the attaching area, then the position of the first needle hole can be determined, and the position and guiding of the glenoid cavity reamer can be determined in the mode that a surgical needle is beaten in the first needle hole.

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.

A modular orthopedic implant system configured to interconnect fracture fixation implants with arthroplasty components across multiple anatomic sites. The system incorporates a clothespin-style tapered male stem and a fluted female receiver, forming a secure, fatigue-resistant mechanical interface. This docking feature enables modular coupling between trauma implants such as intramedullary nails and joint replacement constructs including total hip stems, total knee femoral components, total shoulder stems, reverse shoulder humeral components, and ankle arthroplasty tibial components. The modular configuration allows adaptability across anatomical regions, facilitating revision, limb salvage, and periprosthetic fracture stabilization.

The invention relates to the technical field of medical instruments, and discloses a modular artificial shoulder joint replacement implantation structure which comprises a shoulder glenoid assembly, a humerus head assembly, a humerus neck assembly and a humerus handle assembly, and the shoulder glenoid assembly, the humerus head assembly, the humerus neck assembly and the humerus handle assembly are detachably connected and converted. The shoulder glenoid assembly, the humerus head assembly, the humerus neck assembly and the humerus handle assembly can form a half-shoulder joint replacement structure, a full-shoulder joint replacement structure and a reverse-shoulder joint replacement structure through detachable connection and conversion, and a half-shoulder replacement system, a full-shoulder replacement system and a reverse-shoulder replacement system are integrated into one set of structure through modular design. All the components can be freely disassembled and converted, the links of research and development, testing and verification are reduced, the production cost and inventory pressure of enterprises are reduced, and therefore the expansibility and flexibility of shoulder joint replacement surgery are improved, and doctors can accurately match the components according to the specific illness state of a patient to meet the treatment requirements of different injury types.

Patient-specific instrumentation for reverse shoulder surgery includes a jig having a contact surface including a patient-specific surface portion negatively shaped as a function of a glenoid surface and configured to be applied against the glenoid surface in unique complementary engagement. A first throughbore opens into the contact surface, the first throughbore having an axis corresponding to a first altered bone plane in the glenoid surface. A second throughbore opens into the contact surface, the second throughbore having an axis corresponding to a second altered bone plane in the glenoid surface. The axes of the first throughbore and of the second throughbore are not parallel to one another.

The invention relates to the technical field of orthopedic surgery auxiliary instruments, and discloses reverse shoulder joint prosthesis implantation auxiliary equipment which comprises a fixing part, two positioning parts, two guiding parts and two clamping parts, the two positioning parts are symmetrically and rotatably arranged on the fixing part, the two guiding parts are symmetrically and rotatably arranged on the fixing part, and the two clamping parts are symmetrically and rotatably arranged on the fixing part. By arranging the symmetrically-distributed fixing piece, the positioning piece, the guiding piece and the clamping piece, accurate and stable implantation of the reverse shoulder joint prosthesis is achieved, the fixing piece is attached to the humerus through the bent U-shaped bottom support and is matched with an extrusion structure to achieve stable fixation of the device, the angle of the positioning piece can be flexibly adjusted, accurate positioning is achieved by attaching the positioning plate to the sectioning plane of the humerus, and the device is simple in structure and convenient to use. The angle of the guiding piece can be flexibly adjusted, the guiding piece is stably fixed through friction locking, it is ensured that the axis of the prosthesis is aligned with a bone hole, the clamping piece can be adjusted in a sliding mode, the prosthesis is stably clamped without being damaged by being matched with a limiting structure, and the problems that in the prior art, the prosthesis is prone to skewing during implantation, and bone cement wrapping is uneven are solved.

A reverse shoulder system can include, for example, a glenoid baseplate comprising a longitudinal axis, the glenoid baseplate further including a stem and a central channel within a sidewall of the stem. The stem can include a longitudinal axis. The longitudinal axis of the glenoid baseplate can be angled with respect to the longitudinal axis of the stem, wherein the longitudinal axis of the glenoid baseplate is not perpendicular with respect to the longitudinal axis of the stem. Other components including a glenosphere, tools, and methods of use are also disclosed.

This disclosure relates to systems, devices, and processes for performing a reverse shoulder arthroplasty using one or more patient-specific shoulder implants and can include a baseplate implant and a humeral stem implant, both of which can be designed and 3D-printed. In various embodiments, the baseplate includes a fixation member (e.g., a post) and a taper. In at least one embodiment, the fixation member and the taper can each be at any location and protrude from the baseplate at any angle. In at least one embodiment, the system includes a patient-specific pin guide and trial, which have features corresponding to those of the baseplate.

A prosthesis assembly for reverse shoulder arthroplasty, comprising a bearing having a tab positioned along at least a first portion of the outer edge, and a toe projection positioned along a second portion of the outer edge. The prosthesis assembly further comprises a humeral implant having a wall portion with a barb, and an insertion slot passing through the wall portion located distal to the barb, the insertion slot being configured to receive a portion of an insertion tool, the portion of the barb engaging with the tab to connect the bearing to the humeral implant.

A method of designing a reverse shoulder implant is provided. The method comprises determining a native total lateral offset of the native shoulder corresponding to the lateral offset of the centre of