Mandibular Reconstruction Prosthesis With Deformable Cushion
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Solution Overview
Problem
Conventional mandibular reconstruction methods, such as the fibula flap procedure and 3D printed metal prostheses, fail to adequately match the size and geometry of mandibular defects, leading to severe facial defects and inability to withstand dental implant surgery due to stress concentration and deformation issues.
Innovation Solution
A reconstruction prosthesis comprising multiple units with a cushion structure that absorbs impact and vibration, allowing for customization to match the mandibular defects, and includes a deformable cushion structure to distribute pressure, preventing stress concentration and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fibula flap procedure is used to reconstruct mandibular defects, then bone tissue can be harvested to rebuild mandibular structures, but the fibula fragments fail to match the size and geometry of mandibular defects resulting in severe facial defects
Solution Approach 1:
The patent creates a precise copy or replica of the patient's specific mandibular defect geometry using 3D scanning and printing technology. The prosthesis is custom-made to exactly match the unique shape and size of the individual patient's defect, rather than using standardized fibula fragments that cannot adapt to varying defect geometries.
Solution Approach 2:
The patent changes the physical parameters of the prosthesis by using 3D printing to create custom geometries that precisely match patient-specific defects. The design parameters (size, shape, curvature) can be adjusted during digital design to achieve perfect geometric matching with the mandibular defect.
2Strength
If conventional metal mandibular prosthesis is used, then structural support can be provided, but pressure cannot be distributed resulting in stress concentration and deformation or collapse of prosthesis parts
Solution Approach 1:
The patent incorporates a cushion structure that acts as a flexible element between the rigid metal prosthesis and the surrounding bone tissue. This cushion layer distributes applied pressures and stresses over a larger area, preventing stress concentration points that would lead to prosthesis deformation or collapse.
Solution Approach 2:
The patent creates a composite structure combining rigid metal components for structural support with a cushion material for stress distribution. This composite design allows the prosthesis to maintain strength while simultaneously distributing pressures to prevent stress concentration and deformation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The prosthesis effectively reduces stress concentration and deformation, enabling successful dental implant surgery and maintaining chewing ability, while being customizable to fit individual mandibular defects, thus addressing the limitations of existing reconstruction methods.
Implementation Method 1
The cushion structure is deformable with respect to the main part
Implementation Method 2
a cushion structure that absorbs impact and vibration
Implementation Method 3
absorbs impact and vibration, allowing for customization to match the mandibular defects
Data Source
AI summary
The disclosure relates to a reconstruction prosthesis including a plurality of prosthesis units connected in series. Each of the prosthesis units includes a main part and a cushion structure. The main part has an abutment insertion opening and an accommodation space. The cushion structure is located in the accommodation space and movably located at the abutment insertion opening and defining an abutment mounting hole connected to the abutment insertion opening. The cushion structure is deformable with respect to the main part.