Acetabular Alignment Guide for Hip Prosthesis Positioning
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Solution Overview
Problem
Current orthopaedic surgical instruments lack precise mechanisms for aligning and installing acetabular prosthetic components at optimal anteversion and abduction angles during hip arthroplasty procedures, leading to potential misalignment and instability in prosthetic joints.
Innovation Solution
A system comprising a femoral component with a post and an acetabular alignment guide instrument, which includes a distal end coupled to the femoral component and a proximal engagement rim coupled to the acetabular cup component, allowing for adjustable angles to orient the acetabular cup component at predetermined anteversion and abduction angles, ensuring precise positioning and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional orthopaedic surgical instruments are used for installing acetabular prosthetic components, then the surgical procedure can be completed, but precise alignment at optimal anteversion and abduction angles cannot be achieved
Solution Approach 1:
The alignment guide instrument is divided into multiple functional segments: a body portion that interfaces with the femoral component, a cup interface portion that interfaces with the acetabular cup, and an adjustable positioning mechanism. This segmentation allows each part to perform its specific function while maintaining overall alignment precision without requiring an overly complex monolithic structure.
Solution Approach 2:
The instrument incorporates adjustable mechanisms that allow dynamic modification of the angle between the body portion and cup interface portion during the surgical procedure. This dynamic adjustability enables precise positioning at optimal anteversion and abduction angles while keeping the instrument design relatively simple through modular adjustment components rather than fixed complex geometry.
2Adaptability or versatility
If fixed-angle alignment instruments are used, then the instrument structure is simple, but customizable positioning at predetermined anteversion and abduction angles is not possible
Solution Approach 1:
The instrument features an adjustable connection between the body portion and cup interface portion that allows the angle between these components to be modified during surgery. This dynamic adjustment capability provides adaptability for different anteversion and abduction angle requirements while maintaining a relatively simple overall structure through the use of straightforward mechanical adjustment mechanisms.
Solution Approach 2:
The instrument enables change in the angular parameter between the body portion and cup interface portion to achieve predetermined anteversion and abduction angles. By allowing this key geometric parameter to be adjusted rather than fixed, the instrument achieves versatility for different surgical requirements without requiring completely different instrument designs for each angle configuration.
3Manufacturing precision
If precise alignment mechanisms are added to the surgical instrument, then positioning accuracy improves, but the ease of operation during surgery decreases
Solution Approach 1:
The instrument is segmented into distinct functional portions with clear interfaces: the body portion for femoral component engagement, the cup interface portion for acetabular cup engagement, and adjustment mechanisms. This segmentation allows the surgeon to operate on each portion independently and systematically, improving ease of operation while maintaining positioning accuracy through the coordinated function of segmented components.
Solution Approach 2:
The alignment guide instrument incorporates self-aligning features where the geometric relationships between the body portion, adjustment mechanisms, and cup interface portion automatically establish the correct anteversion and abduction angles when properly assembled. This self-service capability reduces the cognitive and manual burden on the surgeon while maintaining high positioning accuracy.
Data Source
AI summary
A system for use during an orthopaedic surgical procedure includes a femoral broach, an acetabular cup component, and an acetabular alignment guide. The femoral broach includes a mounting post positioned at a superior end of an elongated body. The cup component includes a distal rim and a curved surface extending inwardly from the rim to define a cavity. The alignment guide includes a distal end configured to be coupled to the mounting post and a proximal end configured to be coupled to the distal rim. When coupled to the femoral broach, the guide instrument is sized to orient the acetabular cup component relative to the femoral broach. The acetabular cup component may be a prosthetic cup component or a trial instrument corresponding to the prosthetic cup component.