Non-Threaded Bone Anchor Compression Through Offset Head Motion
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Solution Overview
Problem
Current orthopedic and dental procedures using screw plates do not effectively achieve bone compression or distraction, and threaded anchors tend to back out over time.
Innovation Solution
A system utilizing non-threaded anchors that interact with apertures in a supra implant to cause transverse movement, achieving compression or distraction of boney structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded anchors are used to join bone structures, then the anchors can be inserted into bone structures, but the anchors tend to back out over time and fail to achieve consistent bone compression
Solution Approach 1:
The patent inverts the traditional threaded anchor design by using a non-threaded anchor with an offset head. Instead of threads engaging with bone to prevent backing out, the offset head geometry interacts with the aperture in the supra implant to create transverse movement that achieves compression while preventing anchor migration through a different mechanical mechanism.
Solution Approach 2:
The patent changes the geometric parameters of the anchor by introducing an offset head position relative to the anchor shaft. This offset parameter creates the transverse movement capability when the anchor head interacts with the aperture features, enabling consistent bone compression without relying on threaded engagement.
2Stability of the object's composition
If plates with dedicated screw channels are used to stabilize bone structures, then the bone structures are stabilized, but the screw plate configurations do not compress the bone structures together
Solution Approach 1:
The patent merges the stabilization function and compression function into a single anchor-aperture interaction mechanism. The offset head design allows the anchor to simultaneously achieve both stabilization (through engagement with the aperture) and compression (through transverse movement) without requiring separate mechanisms for each function.
Solution Approach 2:
The patent introduces dynamic transverse movement capability to the anchor system through the offset head geometry. This allows the anchor to move transversely within the aperture during insertion, converting the insertion motion into useful compression force, thereby achieving both stabilization and compression with a single dynamic action.
3Reliability
If non-threaded anchors with offset heads are used to cause transverse movement, then bone compression or distraction is achieved, but the device complexity increases
Solution Approach 1:
The patent extracts the threading feature from the anchor design, removing the complex threaded engagement mechanism while retaining the compression function through the offset head geometry. This simplification eliminates the backing out problem associated with threads while achieving the same compression effect through a simpler non-threaded design.
Data Source
AI summary
Disclosed are system and methods that use at least one non-threaded anchor and an implant with at least one aperture to join boney structures, where the interaction of the head of the anchor with the implant aperture causes the anchor to move transversely with respect to an initial trajectory. This movement causes compression or distraction of the boney structures which are coupled to the anchors.