Open Vertebral Osteosynthesis Connection Assembly
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Solution Overview
Problem
Existing vertebral osteosynthesis equipment is difficult to implement due to the need for precise assembly and disassembly of connection pieces, which are prone to escape due to their small dimensions, complicating the testing of rod curvature during surgical interventions.
Innovation Solution
The equipment features 'open' type connection assemblies with a movable mating component piece that can be easily assembled into a unitary structure, allowing for secure engagement and disengagement of rods without repeated installation and removal of separate pieces, using assembly and maintaining means such as collars and grooves or protuberances to facilitate handling and prevent excessive tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If connection pieces and mating component pieces are assembled separately at the bottom of the cavity, then the rod can be engaged and disengaged for testing curvature, but the small dimensions of the pieces make them prone to escape and complicate the assembly process
Solution Approach 1:
The patent combines the connection piece and mating component piece into a single pre-assembled unitary structure. The mating component piece is permanently attached to the connection piece, forming one integrated component that is inserted as a complete unit into the cavity. This eliminates the risk of small separate pieces escaping during surgery and simplifies the assembly process by reducing the number of discrete components the surgeon must handle and position separately.
2Reliability
If connection pieces are of closed type with fully enclosed receiving channels, then rod engagement is secure, but repeated assembly and disassembly for testing rod curvature becomes difficult and time-consuming
Solution Approach 1:
The patent employs a dynamic design where the receiving channel transitions from an open state during insertion to a closed state during operation. Initially, the receiving channel is open to allow easy insertion of the rod. Once the rod is engaged, the structure automatically closes or locks to securely retain the rod. This dynamic behavior enables secure rod retention while facilitating quick insertion and testing operations without requiring repeated manual assembly and disassembly.
3Manufacturing precision
If connection assemblies require precise positioning and successive assembly of multiple components, then proper alignment is achieved, but the complexity of the procedure increases and handling becomes more difficult
Solution Approach 1:
The patent applies preliminary action by pre-assembling and pre-positioning the mating component piece relative to the connection piece before insertion into the cavity. The components are manufactured and positioned in their correct relative orientations during fabrication, eliminating the need for complex intraoperative alignment procedures. This pre-positioning ensures proper alignment is achieved automatically upon insertion, significantly reducing assembly complexity and surgical procedure time.
Data Source
AI summary
Vertebral osteosynthesis equipment is disclosed, including a connection assembly with a connection piece of open type and a mating component piece positioned one with respect to the other. The connection piece includes a hole, where the mating piece is dimensioned to be engaged in the interior of the hole in a fit adjusted manner and is slidable within the hole. The connection piece is assembled to the mating component piece in separated apart position based on a force that is less than a clamping force exerted by a nut to be screwed on to a proximal threaded pin of an anchoring member that can be tightened so as to bring the connection piece and the mating component piece in a close position.