Implant Inserter Cammed Sleeve Grip Mechanism
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Solution Overview
Problem
Current implant inserter devices lack sufficient retention and control of implants during surgical procedures for articular cartilage and bone repair, leading to improper positioning and healing issues.
Innovation Solution
The implant inserter device features an outer collar with cammed surfaces and an inner sleeve with ribs, allowing for secure grip and rotation to maintain control over the implant, along with a push rod for precise insertion and a miter cap for trimming, ensuring accurate implant placement and sizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the implant inserter device uses a simple retention mechanism, then the device complexity is reduced, but the retention and control of the implant during surgical procedures is insufficient
Solution Approach 1:
The device employs a nested structure where the inner sleeve is received within the outer collar, and the push rod is received within the inner sleeve. This nested arrangement allows multiple functional components to be integrated in a compact configuration, providing reliable implant retention through the collaborative action of the cammed surface mechanism while maintaining manageable device complexity.
Solution Approach 2:
The inner sleeve is designed to be deformable, transitioning between an undeformed state (when the implant is loaded) and a deformed state (when the implant is secured). This dynamic characteristic allows the retention mechanism to adapt to the implant, providing reliable control without requiring an overly complex rigid structure.
2Reliability
If the inner sleeve is made from soft and flexible material to enable gripping, then the retention of implant is improved, but the structural strength may be compromised
Solution Approach 1:
The distal end of the inner sleeve is specifically designed with soft and flexible material properties to enable gripping of the implant, while the proximal end maintains greater structural integrity. This localized differentiation of material properties allows the device to achieve reliable implant retention at the gripping surface while preserving overall structural strength for handling and insertion.
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
The device provides reliable retention and control of implants, enabling precise insertion and trimming, thereby enhancing the surgical repair of articular cartilage and bone by ensuring proper implant positioning and sizing, which is crucial for effective healing.
Implementation Method 1
The outer collar has at least one cammed surface formed on an interior surface thereof, while the inner sleeve has at least one rib projecting outwardly from an exterior surface thereof. The rib is releasably engageable with the cammed surface when the inner sleeve is rotated relative to the outer collar.
Data Source
AI summary
An implant inserter device having an outer collar, an inner sleeve slidably and rotatably received within the outer collar, and a push rod slidably received within the inner sleeve. The outer collar has at least one cammed surface formed on an interior surface thereof, while the inner sleeve has at least one rib projecting outwardly from an exterior surface thereof. The rib is releasably engageable with the cammed surface when the inner sleeve is rotated relative to the outer collar. As a result, a distal end of the inner sleeve collapses from an undeformed position, in which the inner sleeve does not grip an implant housed therein, and a deformed position, in which the inner sleeve grips the implant. The push rod is movable between an extended position and a retracted position for urging the implant through and from the inner sleeve for insertion into a defect in damaged cartilage and bone.