Scapular Spine Implant Fixation Across Reverse Shoulder Fracture Zones
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Solution Overview
Problem
Conventional treatments for scapular spine fractures after reverse total shoulder arthroplasty are invasive and have limited success, and there is a need for minimally invasive prophylactic measures to prevent such fractures.
Innovation Solution
A minimally invasive surgical method using a scapular spine implant with a single incision, optionally with an external targeting device, to secure the implant to the scapular spine using locking or non-locking screws, avoiding common fracture zones to provide stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open reduction with plate fixation is used to treat scapular spine fractures, then fracture stabilization is achieved, but surgical invasiveness and complexity increase
Solution Approach 1:
The implant is divided into distinct functional segments: a first end portion for medial fixation, a second end portion for lateral fixation, and an intermediate portion for spanning the fracture zone. This segmentation allows targeted stabilization of fracture-prone areas while minimizing disturbance to healthy bone structures.
Solution Approach 2:
The implant provides localized reinforcement at the scapular spine fracture-prone zones (Levy I, II, and III zones) through its intermediate portion, while the end portions are designed for secure fixation in stable bone regions. This local quality approach ensures fracture stabilization without unnecessary surgical disruption of healthy areas.
2Reliability
If prophylactic measures are implemented before rTSA, then fracture prevention is improved, but the complexity of the surgical procedure increases
Solution Approach 1:
The implant can be installed prophylactically before reverse total shoulder arthroplasty to prevent scapular spine fractures. The implant's design with screw holes positioned to avoid fracture zones allows preventive fixation that does not interfere with subsequent rTSA procedures, thereby improving fracture prevention without significantly increasing overall procedural complexity.
3Object-affected harmful factors
If screws are placed to avoid fracture zones, then further damage risk is reduced, but fixation strength may be compromised
Solution Approach 1:
The implant's intermediate portion is specifically designed to provide localized reinforcement at the scapular spine fracture-prone zones (Levy I, II, and III zones) without requiring screw placement in these vulnerable areas. This allows the structure to gain strength from the implant itself while screws are positioned only in stable bone regions, thereby reducing further damage risk while maintaining fixation strength.
Solution Approach 2:
The implant functions as a composite structural element that combines the strength of the metallic implant material with the existing healthy bone at the fixation sites. By spanning the fracture zones without screw placement, the implant creates a composite structure where the implant body provides reinforcement while screws anchor only in stable bone regions, balancing damage prevention with fixation strength.
Data Source
AI summary
An elongated implant for prophylactic treatment and post-fracture treatment of fractures of the spina scapulae incident to reverse total should arthroplasty, the elongated implant having an intermediate portion between two end portions, which intermediate portion may span all or a portion of the Levy zone II fracture area.