Acetabular Positioning Device With Segmented Pin Guides
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Solution Overview
Problem
Current acetabular positioning devices for hip arthroplasty lack effectiveness in accurately guiding surgeons during acetabular procedures, leading to inefficiencies in positioning and reaming.
Innovation Solution
A positioning device with a base plate, central pin guide hole, and stabilizing holes at specific angles (12 o'clock, 6 o'clock, and 8½ o'clock positions) to guide pins for precise acetabular pin placement, accompanied by a reamer guide for accurate reaming, utilizing a patient-specific custom mold prepared via MRI/CT scans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a positioning device is used to guide pin placement and reaming, then surgical precision and anatomical alignment are improved, but device complexity increases
Solution Approach 1:
The positioning device is divided into multiple functional components: a base plate for acetabular coverage, multiple positioning holes (central, first, second, third) for different pin types, and a reamer guide. Each component serves a specific function, allowing the device to achieve precise positioning and reaming guidance without requiring a single complex monolithic structure.
Solution Approach 2:
The base plate serves multiple functions simultaneously: it provides the structural foundation, contains the central pin guide hole for centering, includes multiple positioning holes for stabilizing pins at specific angles, and incorporates a reamer guide for accurate reaming. This multi-functionality reduces the need for separate devices while maintaining surgical precision.
2Manufacturing precision
If multiple positioning holes are provided at specific angles, then pin placement accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The positioning holes are strategically located at specific angular positions (central, 12 o'clock, 6 o'clock, and 8½ o'clock) corresponding to the anatomical requirements of the acetabulum. Each hole's position and orientation are optimized for its specific function, such as the central hole for centering and the peripheral holes for stabilizing pins at critical angles, achieving precise pin placement through localized geometric precision rather than uniform complexity throughout the device.
Data Source
AI summary
A positioning device for acetabular procedures is provided. The positioning device for acetabular procedures includes a base plate, a central pin guide hole, a first positioning hole, and a second positioning hole. The central pin guide hole is provided through a central portion of the base plate and configured for guiding a center pin to be disposed in a specific portion of an acetabulum of a patient. The first positioning hole is provided through a first edge portion of the base plate and configured for guiding a first stabilizing pin. The second positioning hole is provided through a second edge portion of the base plate and configured for guiding a second stabilizing pin. The positioning device further includes a third positioning hole provided through a third edge portion of the base plate and configured for guiding a third stabilizing pin.