Pre-formed Augmentation Device for Glenoid Rim Repair
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Solution Overview
Problem
The existing methods for repairing and augmenting the articular surface or rim of a joint, such as the Laterjet procedure, rely on a trial-and-error approach that is complicated by variations in coracoid shape, leading to potential complications in stabilizing the shoulder joint.
Innovation Solution
A pre-formed device with a coupling side and a concave side at a non-parallel angle is used, which can be coupled to a bone adjacent to a joint socket, featuring holes for screw insertion and projections to resist movement, and is designed to augment the articular surface, along with a jig and reamer for precise shaping of the bone to match the device's shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a trial-and-error approach is used to shape the removed portion of the coracoid process to the anterior glenoid rim, then the surgeon can iteratively adjust the shape to augment the glenoid rim, but the process becomes complicated and time-consuming due to variations in coracoid shape
Solution Approach 1:
The device includes a pre-formed body with a pre-configured concave surface that is designed to match the anterior glenoid rim geometry beforehand. This preliminary preparation eliminates the need for intraoperative trial-and-error shaping, as the device is already adapted to accommodate variations in coracoid shape while maintaining consistent augmentation geometry.
Solution Approach 2:
The device creates a standardized geometric copy or model of the ideal glenoid rim augmentation shape. By using a pre-formed body with a predetermined concave surface geometry, the invention replicates the desired outcome without requiring iterative manual shaping, thus simplifying the procedure while adapting to different patient anatomies.
2Reliability
If the removed portion of the coracoid process is attached to the clavicle to augment the anterior glenoid, then the glenoid rim is stabilized, but the trial-and-error approach may interfere with normal joint motion
Solution Approach 1:
The device applies augmentation only where needed - the concave surface is specifically configured to match the anterior glenoid rim geometry, providing localized stabilization. The pre-formed body with its specific angular relationship between coupling and concave surfaces ensures that the augmentation is precisely positioned to restore the glenoid rim without over-augmenting or interfering with the natural range of motion of the shoulder joint.
3Manufacturing precision
If a pre-formed device with specific geometry is used to augment the articular surface, then precise alignment and stabilization are achieved, but the device requires precise shaping of the bone to match the device's shape
Solution Approach 1:
The device includes an intermediary jig with a body that has holes extending through it, designed to guide the placement of pins or screws into the bone. This intermediary tool mediates between the pre-formed device and the bone, providing precise alignment and positioning without requiring complex manual bone shaping. The jig acts as a template that simplifies the interface between the standardized device and the patient's anatomy.
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 solution provides a more precise and efficient method for repairing and augmenting joint surfaces, reducing complications by allowing for accurate alignment and stabilization of the joint without interfering with joint motion, and promoting bone ingrowth for stability.
Implementation Method 1
the coupling side is configured to permit bone ingrowth into the body
Data Source
AI summary
Embodiments of devices, apparatuses, kits, and methods for repairing and/or augmenting the articular surface and/or articular rim of a joint (e.g., repairing the anterior glenoid rim after an anterior shoulder dislocation).