Glenoidal Implant Anchoring Stud with Central Removal Hole
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Solution Overview
Problem
Current glenoidal implants with porous or rough surface coatings for osseointegration complicate removal procedures, often requiring significant bone removal, which can impair future implant anchoring and compromise bone preservation during surgical recovery.
Innovation Solution
A glenoidal implant design featuring a main anchoring stud with a central hole extending over 80% of its length, allowing guided removal with a trephine to minimize bone extraction, and a porous or rough surface coating for osseointegration, with a blocked distal end and conical entrance to prevent debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a porous or rough surface coating is applied to the anchoring stud to promote osseointegration, then the anchoring strength and stability are improved, but the removal procedure becomes more difficult and requires significant bone removal
Solution Approach 1:
The anchoring stud is divided into two functional zones: a distal portion with porous or rough coating for osseointegration and anchoring strength, and a proximal portion with a smooth central hole for guided removal. This segmentation allows the stud to provide strong anchoring while enabling precise removal through the central hole with a trephine, minimizing bone removal during extraction.
2Ease of repair
If a central hole is provided in the anchoring stud to facilitate removal, then the ease of removal is improved, but the structural integrity and anchoring capability may be compromised
Solution Approach 1:
The central hole is located specifically in the proximal portion of the anchoring stud, away from the distal anchoring zone. This local placement allows the hole to serve as a removal guide without compromising the structural integrity and osseointegration capability of the distal portion that is in contact with the bone.
3Ease of operation
If the central hole extends over a large portion of the anchoring stud length, then the guiding function for removal is improved, but the anchoring surface area is reduced
Solution Approach 1:
The central hole extends over at least 80% of the anchoring stud length, which is sufficient to provide effective guiding for the trephine during removal. This partial extension along the stud length achieves the guiding function without requiring the hole to extend through the entire length, thereby preserving anchoring surface area while ensuring proper trephine guidance.
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
Enables precise, stable, and complete removal of the anchoring stud with minimal bone damage, facilitating easier replacement and preserving bone integrity for future implants.
Implementation Method 1
at least partially covered with a porous or rough surface coating promoting an osseointegration
Data Source
AI summary
A glenoidal implant for a shoulder prosthesis includes an articular body having two opposite faces which are an articulation face suitable for cooperating with an articulation head of a humeral implant, and an anchoring face from which at least one anchoring stud protrudes for an anchoring in the glenoid cavity including a main anchoring stud at least partially covered with a porous or rough surface coating promoting an osseointegration. The main anchoring stud is provided internally with a central hole extending along a central axis of symmetry of the main anchoring stud and provided to allow guiding a trephine.