Textured Implant Surface for Tissue Ingrowth
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Solution Overview
Problem
Implantable prostheses and devices face issues with scar tissue formation and capsular contracture, leading to undesirable hardening and distortion, as existing textured surfaces may trap body fluids or lack sufficient tissue ingrowth sites.
Innovation Solution
A textured surface is created on implantable devices using alternating layers of polymeric particles and polymer dispersion, forming cavities, interstices, and passageways that allow tissue ingrowth, with the particles being coated to ensure firm attachment and rounded edges for smooth integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a textured surface is created on the implant, then tissue ingrowth and anchoring are improved, but the surface may trap body fluids
Solution Approach 1:
The patent applies different surface characteristics to different regions of the implant. The textured surface with cavities and interstices is applied to specific areas where tissue anchoring is needed, while other areas maintain smooth surfaces that facilitate fluid drainage. This localized differentiation allows the surface to simultaneously promote tissue ingrowth in certain regions while preventing fluid trapping in others.
Solution Approach 2:
The patent creates a three-dimensional textured surface with varying depths of cavities and interstices rather than a uniform two-dimensional surface. This dimensional variation provides multiple levels for tissue ingrowth while the overall surface architecture maintains fluid drainage pathways, resolving the contradiction between providing anchoring sites and preventing fluid accumulation.
2Shape
If existing textured surface methods are used, then surface texture is achieved, but the transitions may have sharp edges and interstices that trap body fluids
Solution Approach 1:
The patent employs curved and rounded transitions between surface features rather than sharp edges. The cavities and interstices are designed with smooth, rounded contours that eliminate sharp angular edges. This curvature not only provides aesthetic improvement but also prevents fluid accumulation in sharp crevices while maintaining the textured surface architecture necessary for tissue ingrowth.
3Reliability
If a textured surface is applied to the implant, then adhesion to surrounding tissue is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The textured surface is applied to the implant during the manufacturing process rather than requiring post-implantation modification. The cavities and interstices are formed as integral features of the implant surface through techniques such as 3D printing or molding, eliminating the need for complex surgical procedures to create the texture and reducing overall manufacturing and surgical complexity.
Data Source
AI summary
A method for forming a randomly textured surface on an implantable device such as soft tissue prosthesis. The textured surface has numerous cavities, interstices and passageways or tunnels and is thus referred to as a microporous surface texture. The surface is formed by two or more applications of polymeric particles and a polymeric dispersion.