Bone Fixation Plate With Positioning Pin And Temporary Wire
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Solution Overview
Problem
Current methods for fixing bone fractures, such as external fixators and bone fixation plates, face challenges in accurately aligning and stabilizing multiple bone fragments, often requiring invasive procedures and leading to complications like reflex sympathetic dystrophy and pin issues, while existing temporary fixation methods are cumbersome and inefficient.
Innovation Solution
A bone fixation assembly featuring a plate with distinct apertures for temporary and permanent fixation, utilizing a temporary fixation wire with an abutment member to compress the plate against the bone, preventing movement and allowing for precise alignment before permanent screw insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a K-wire is used to temporarily fix the bone plate, then the plate can be held in position, but the positioning process becomes difficult and tedious due to the need for precise alignment to prevent movement
Solution Approach 1:
The patent introduces a positioning pin as an intermediary device that mediates between the K-wire and the bone plate. The positioning pin fits into a positioning hole in the bone plate, providing a guided pathway that ensures proper alignment and prevents plate movement during imaging, thereby simplifying the operation while maintaining reliability
Solution Approach 2:
The positioning hole is pre-formed in the bone plate at the correct location and orientation before the K-wire insertion. This preliminary preparation of the positioning hole guides the K-wire into the correct position, eliminating the need for difficult real-time alignment adjustments and preventing plate movement
2Reliability
If holding clamps are used to attach to the bone fixation plate, then temporary fixation is achieved, but the procedure becomes more invasive
Solution Approach 1:
The patent extracts the essential fixation function from the invasive holding clamp design and implements it through a less invasive mechanism. Instead of using clamps that require invasive attachment to the bone or plate, the invention uses a K-wire positioned through a positioning hole with a positioning pin, achieving temporary fixation with minimal invasion to the bone and soft tissues
3Adaptability or versatility
If multiple holes are drilled in the bone for plate repositioning, then alignment can be adjusted, but unnecessary bone damage occurs
Solution Approach 1:
The positioning hole is pre-formed in the bone plate at the correct location and orientation before final plate placement. This preliminary positioning hole guides the K-wire and positioning pin, allowing the plate to be held securely in the correct position without requiring multiple trial holes to be drilled in the bone, thereby preventing unnecessary bone damage while maintaining repositioning capability
Data Source
Figure 1
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Figure 3A~3B
AI summary
A bone fixation assembly is provided, including a bone fixation plate that has a plurality of apertures having different cross-sectional dimensions, and a temporary fixation wire. The temporary fixation wire includes an abutment member that can compress the bone fixation plate against an underlying bone so that the alignment of the bone fixation plate on the bone can be analyzed prior to using bone fixation members to permanently attach the bone fixation plate to the underlying bone.