Flat Bone Implant Structure for Imaging-Safe Tissue Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bone implants that replace or fill defects in flat bones face challenges in maintaining mechanical stability while allowing for X-ray or MRI diagnostics without metallic support structures and intraoperative adjustment.
Innovation Solution
A bi-layered implant structure comprising a non-porous polyetheretherketone (PEEK) or polyethylene (PE) first layer for mechanical stability and a porous polymer second layer for tissue integration, without a metallic support, ensuring X-ray and MRI compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic implant is used to ensure mechanical stability, then the mechanical load-bearing capacity is improved, but the compatibility with X-ray or MRI diagnostics deteriorates
Solution Approach 1:
The implant uses a composite structure combining PEEK (polyetheretherketone) as the base material with a porous polymer coating. PEEK provides the necessary mechanical strength and stability, while being radiolucent and compatible with MRI diagnostics. The porous coating layer enhances tissue integration without compromising the mechanical properties or diagnostic compatibility.
Solution Approach 2:
A porous polymer layer is applied to the implant surface to enable tissue ingrowth and integration. This porous structure allows biological tissue to penetrate and anchor into the implant, providing biological fixation while the underlying PEEK structure maintains mechanical integrity and remains invisible to X-ray and MRI diagnostics.
2Ease of operation
If the implant is made flexible for intraoperative adjustment, then the ease of operation is improved, but the mechanical strength deteriorates
Solution Approach 1:
The implant incorporates a thin, flexible PEEK coating layer that can be bent and adjusted intraoperatively to match the patient's anatomy. This flexible shell provides the necessary adaptability during surgery while the underlying porous structure and overall design maintain sufficient mechanical strength for load-bearing applications.
3Reliability
If a porous structure is used to enable tissue integration, then the biocompatibility is improved, but the mechanical strength deteriorates
Solution Approach 1:
The implant is segmented into distinct functional layers: a dense PEEK base layer that provides mechanical strength and structural integrity, and a porous polymer coating layer that enables tissue integration. This segmentation allows each layer to optimize its specific function without compromising the other, achieving both high mechanical strength and effective biocompatibility.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An implant (X) for replacing or filling a defect in a planar bone, wherein the implant (X) has a planar shape with a first side (X1) and an opposing second side (X2), wherein the implant (X) has a first layer (S1) of non-porous polyetheretherketone or polyethylene having a layer thickness such that the shape of the implant (X) is determined by the shape of the first layer (S1), wherein the implant (X) has at least partially on the first side (X1) a second layer (S2) of a porous polymer which is not polyaryletherketone or polyetheretherketone, and a method for manufacturing such an implant (X).