Acellular Dermal Matrix with Elongated Openings for Breast Prosthesis
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Solution Overview
Problem
Existing acellular dermal matrices used in breast reconstruction lack the ability to adapt perfectly to the convex shape of breast prostheses without causing unwanted tension or folds, as they do not have openings that can stretch and adjust to varying tensile forces effectively.
Innovation Solution
A flexible acellular dermal matrix with elongated openings that can change from slots to orifices upon stretching, allowing for variable section geometry and distribution, enabling the matrix to conform optimally to the prosthesis surface while minimizing tension imbalances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the matrix uses round through holes, then fluid flow is allowed and suture attachment is enabled, but the matrix cannot adapt to varying tensile forces and causes folds or tension imbalances
Solution Approach 1:
The patent transforms static circular holes into dynamic elongated openings that can change their effective size and shape in response to applied tensile forces. The openings are configured to stretch preferentially in the direction of applied force, allowing the matrix to dynamically adapt its geometry to match the contours of the prosthesis and distribute tension evenly across the tissue interface.
Solution Approach 2:
The patent changes the geometric parameters of the openings from fixed circular shapes to elongated configurations with specific aspect ratios. This parameter change enables the openings to deform in a controlled manner under tensile stress, transforming the matrix from a rigid structure into one that can accommodate varying mechanical loads while maintaining structural integrity and preventing fold formation.
2Shape
If the matrix is made solid and flexible, then it can cover the prosthesis, but it cannot conform perfectly to the convex shape without tension or folds
Solution Approach 1:
The patent segments the continuous matrix material into distinct regions separated by elongated openings. This segmentation creates a mesh-like structure where the solid portions can independently deform and conform to the prosthesis surface while the openings provide flexibility and tension relief. The segmented structure allows each region to adapt locally to the convex geometry without creating unwanted tension concentrations.
Solution Approach 2:
The patent utilizes the inherent flexibility of the thin film matrix material and enhances it through the incorporation of elongated openings. The combination of flexible material properties and the geometric configuration of openings creates a structure that can bend, stretch, and conform to complex curved surfaces like breast prostheses, achieving perfect surface contact without creating folds or tension imbalances.
3Adaptability or versatility
If the openings are elongated in resting state, then stretching in all directions is allowed, but the manufacturing precision becomes more challenging
Solution Approach 1:
The patent designs a universal opening configuration that serves multiple functions: providing fluid flow pathways, enabling suture attachment, allowing multi-directional stretching, and distributing tensile forces evenly. The elongated opening geometry with specific aspect ratios achieves all these functions simultaneously, making the matrix design universally applicable to various prosthesis sizes and shapes while maintaining manufacturability through standardized patterns.
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 matrix effectively adapts to the prosthesis surface, preventing folds and tension imbalances, ensuring a secure and balanced fit during use, with openings capable of expanding up to 5:1 in width, forming a mesh that matches the prosthesis geometry for secure coverage.
Implementation Method 1
The shape of the openings in the resting state of the matrix or in the stretched state is oblong. Thus, the elongated shape of the openings allows stretching in all directions of the sheet, which allows the matrix to perfectly fit the receiving surface of said matrix in the position of use.
Data Source
Figure 1~4
Figure 5~9
Figure 10
AI summary
The object of the invention is an acellular dermal matrix (1) comprising a solid and flexible sheet (10) which is provided with a plurality of through-openings (4) and is characterized in that the openings (4) have an elongated shape and, in particular, are forming slits (40). The openings are particularly suitable for opening in the form of a diamond.