Open Wedge High Tibial Osteotomy Apparatus with Hinge Pin
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Solution Overview
Problem
Open wedge high tibial osteotomies are procedurally challenging due to difficulties in creating a wedge-like opening in the tibia with precision and minimizing trauma to surrounding tissues, and stabilizing the bone portions during healing.
Innovation Solution
A novel surgical apparatus comprising an adjustable base assembly, keyhole drill guide, biplanar alignment assembly, hinge pin, cutting guide, neurovascular shield, and opening jack assembly, which allows for precise osteotomy cuts and stabilization of the tibia with a wedge-shaped implant, reducing tissue trauma and improving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a wedge-like opening is created in the tibia using conventional techniques, then the osteotomy can be performed, but precision is difficult to achieve and trauma to surrounding tissue is maximized
Solution Approach 1:
A hinge pin is introduced as an intermediary element to define the hinge axis of rotation for the osteotomy. The hinge pin serves as a mediator between the surgical tools and the tibia, allowing precise control over the cutting path and hinge axis while minimizing direct trauma to surrounding soft tissues through guided, controlled bone separation
Solution Approach 2:
The hinge pin is inserted into the tibia before the actual osteotomy cutting begins. This preliminary action establishes the precise hinge axis and guides subsequent cutting operations, ensuring accurate wedge formation while reducing the need for multiple trial cuts and associated tissue trauma
2Adaptability or versatility
If the tibia is manipulated to open the wedge-like opening, then the geometry can be adjusted, but stability of the upper and lower portions during healing is difficult to maintain
Solution Approach 1:
The tibia is segmented into upper and lower portions through the controlled wedge opening, allowing independent manipulation and adjustment of each segment. The hinge pin maintains the hinge axis during this segmentation, enabling geometry adjustment while the segmented structure can be stabilized individually during healing
Solution Approach 2:
The hinge pin acts as a stable intermediary element that maintains the hinge axis between the upper and lower tibia portions during manipulation. This mediator provides rotational stability while allowing the wedge opening to be opened to the desired degree for geometry adjustment
Data Source
AI summary
The present invention comprises a novel method and apparatus for performing an open wedge, high tibial osteotomy. More particularly, the present invention comprises the provision and use of a novel method and apparatus for forming an appropriate osteotomy cut into the upper portion of the tibia, manipulating the tibia so as to open an appropriate wedge-like opening in the tibia, and then mounting an appropriately-shaped implant at the wedge-like opening in the tibia, so as to stabilize the tibia with the desired orientation, whereby to reorient the lower portion of the tibia relative to the tibial plateau and hence adjust the manner in which load is transferred from the femur to the tibia.