Reverse Shoulder Humeral Implant Adapter for Bone-Preserving Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing joint replacement surgeries, particularly in reverse shoulder procedures, face challenges in preserving healthy bone, require extensive bone removal for implant fixation, and prolong surgery time, leading to increased complications and recovery time.
Innovation Solution
A system comprising a tray with a lip and base portion that secures to the humerus via a friction fit, a stem with an adapter to minimize bone removal, and a liner for the head implant, allowing for a secure and stable implant fixation without cement or additional screws, along with an offset tool for precise adapter sizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional joint replacement involves removing the upper condyle or a portion of the upper condyle of an articulating bone, then the implant can be placed and cemented into place, but the amount of healthy bone removed increases and surgery time increases
Solution Approach 1:
The implant system is divided into separate functional components: a tray that interfaces with the bone surface, a stem for internal fixation, and an adapter that couples them together. This segmentation allows each component to be optimized independently and enables modular assembly during surgery, reducing the need for extensive bone removal while ensuring stable fixation.
Solution Approach 2:
The adapter serves as an intermediary component between the tray and the stem. It fills the spacing between the tray base portion and the stem inner surface, creating a flush interface that eliminates gaps and ensures stable mechanical coupling without requiring additional bone removal or cement.
2Reliability
If traditional joint replacement involves removing the upper condyle or a portion of the upper condyle of an articulating bone, then the implant can be placed and cemented into place, but the surgery time increases
Solution Approach 1:
The tray, stem, and adapter are designed as pre-assembled or pre-configured components that can be quickly assembled and implanted. The tray is positioned first to establish the interface with the bone, followed by insertion of the adapter and stem in a sequential manner, significantly reducing the overall surgery time compared to traditional multi-step procedures.
Solution Approach 2:
The invention extracts and eliminates the need for bone cement and additional screws from the fixation process. By using the adapter to create a flush interface between the tray and stem, the system achieves stable fixation without these additional materials and steps, thereby reducing surgery time.
3Reliability
If an adapter is used to fill spacing between the tray base portion and stem inner surface, then the implant stability is enhanced, but the device complexity increases
Solution Approach 1:
The adapter is designed as a universal component that can be used with different tray and stem configurations. It performs multiple functions: filling spacing, creating a flush interface, and providing mechanical coupling. This multi-functionality reduces the need for multiple specialized components, effectively managing device complexity while enhancing implant stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system reduces bone removal, shortens surgery time, and enhances implant stability, providing a secure and flexible fixation method for reverse shoulder surgery, minimizing complications and accelerating recovery.
Implementation Method 1
The body is configured to be at least partially received within a concave inner surface of an implant site in a humerus of the subject. The lip is configured to engage an outer surface of the implant site, thereby coupling the tray to the humerus.
Data Source
AI summary
Described herein are reverse shoulder devices and related systems, methods, and kits useful in implanting a humeral implant in the humerus bone. In some embodiments, a humeral implant device is described that includes a liner, a tray, and an adaptor. In some embodiments, the humeral implant further includes a stem. In some embodiments, the liner is configured to receive a glenosphere. In some embodiments, an offset tool is described that comprises a distal portion configured to interface with a humeral implant stem and a proximal portion configured to interface with a humeral implant tray. In some embodiments, an offset tool is described for determining a desired size of an adapter for use with a humeral implant. In some embodiments, the offset tool includes a trial tray assembly, an outer shaft, and an inner shaft.