Surface-Treated Biocomposite Implants for Load-Bearing Bone Fixation
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Solution Overview
Problem
Existing bioabsorbable polymer implants lack sufficient mechanical strength and modulus to support fractured cortical bone, limiting their use to non-load bearing applications, and their fixation requires protection from motion or significant loading.
Innovation Solution
Development of surface treated biocomposite materials with aligned mineral and polymer compositions, featuring a surface layer with increased roughness and altered mineral content to enhance mechanical properties and bone attachment, allowing for load-bearing orthopedic applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If non-reinforced resorbable polymers are used for medical implants, then the implants are biocompatible and can be absorbed by the body, but the mechanical strength and modulus are insufficient to support fractured cortical bone
Solution Approach 1:
The patent applies composite materials by combining resorbable polymers with reinforcing fibers (such as glass fibers or other biocompatible fibers) to create a biocomposite material. This composite structure provides both the mechanical strength needed for load-bearing applications and the biocompatibility of the polymer matrix, resolving the contradiction between strength and adaptability.
2Strength
If the mechanical strength of bioabsorbable implants is increased through reinforcement, then load-bearing applications become possible, but the complexity of material composition and structure increases
Solution Approach 1:
The patent applies local quality by creating a surface layer with different properties than the bulk material. The surface layer is enriched with mineral content and has increased roughness to specifically enhance bone attachment at the implant-bone interface, while the bulk material provides overall structural strength. This resolves the contradiction by adding functionality only where needed rather than uniformly throughout the entire implant.
3Ease of manufacture
If a uniform composition is used throughout the implant, then manufacturing is simplified, but the surface properties are not optimized for bone attachment
Solution Approach 1:
The patent creates a differentiated structure with a surface layer having different composition and properties than the bulk material. The surface layer is specifically designed with higher mineral content and increased roughness to optimize bone attachment, while the bulk material maintains the required mechanical strength. This resolves the contradiction between manufacturing simplicity and bone attachment reliability by applying the complex surface treatment only where it is functionally necessary.
4Strength
If the implant material has high mineral content throughout, then mechanical strength is improved, but the surface properties may not be optimized for bone attachment and the material may resorb too quickly
Solution Approach 1:
The patent applies local quality by creating a surface layer with differentiated properties from the bulk material. The bulk material contains the mineral reinforcement needed for mechanical strength, while the surface layer is specifically engineered with optimal mineral content and roughness to enhance bone attachment and control resorption rate. This resolves the contradiction by separating the functions of strength provision and surface optimization into different regions of the implant.
Data Source
Figure 1A~1C
Figure 2
Figure 3A~3B
AI summary
Reinforced biocomposite materials having a unique treated surface, in which the surface may comprise a plurality of layers. According to at least some embodiments, medical implants are provided that incorporate novel structures, alignments, orientations and forms comprised of such reinforced bioabsorbable materials, as well as methods of treatment thereof.