Pi-Shaped Bone Plate Multi-Axis Contouring
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Solution Overview
Problem
Traditional bone plates used in high tibial osteotomy surgeries are limited in coverage, prone to stress concentration, and can deform, leading to loosening and shaking issues, and obstruct the visibility and treatment of the wound.
Innovation Solution
An approximately π-shaped bone plate structure with a plate body, first and second extension portions, a contouring portion, and through holes, allowing for multi-axis fitting, stress distribution, and intra-operative adjustment to prevent deformation and improve fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional T-shaped, I-shaped or L-shaped bone plates are used, then the bone plate can be fixed on the proximal tibial articular surface, but the surface area coverage is very limited making fixation difficult and causing loosening and shaking problems
Solution Approach 1:
The bone plate transitions from traditional 2D planar shapes (T-shaped, I-shaped, L-shaped) to a 3D multi-layer stacked structure. Multiple plate bodies are stacked along the vertical direction to increase surface area coverage on the proximal tibial articular surface while maintaining structural integrity and fixation stability.
Solution Approach 2:
The bone plate is divided into multiple separate plate bodies that are stacked together. Each plate body can be independently designed and positioned, allowing better adaptation to the complex geometry of the tibial surface while collectively providing extensive coverage and stable fixation.
2Strength
If traditional bone plates with limited coverage are used, then the structure remains simple, but stress concentration occurs causing bone plate deformation and potential damage to the patient
Solution Approach 1:
The load-bearing function is segmented across multiple plate bodies. Each plate body bears a portion of the total load, distributing stress more evenly across the entire structure and preventing stress concentration at any single point, thereby reducing deformation risk.
Solution Approach 2:
The bone plate system functions as a composite structure where multiple plate bodies work together as integrated components. The stacked configuration creates a composite load-bearing system that combines the strength of individual plates while distributing mechanical stresses across the entire assembly.
3Ease of operation
If traditional bone plates are used, then manufacturing and design remain simple, but the opening filling portion cannot be properly observed or treated due to coverage obstruction
Solution Approach 1:
The bone plate is segmented into multiple separable plate bodies stacked in layers. This segmentation creates gaps and pathways between the plates, allowing surgical instruments to access the opening filling portion for observation and treatment while the plates collectively maintain adequate coverage of the proximal tibial articular surface.
Data Source
AI summary
The present invention discloses an approximately π-shaped improved bone plate structure, fixed on a bone of an animal for maintaining the relative positions of different portions of the bone. One of the other features of the present invention is that bone plate structure comprises at least one contouring portion for allowing the surgeons to intra-operatively adjusting the shape in accordance with the shape of the bone. Furthermore, the present invention may fit the bone with multi-axis, decreasing stress concentration, preventing the opening portion from being unsuitably covered and preventing the wound deformation from being pressed.