Implant Surface Functionalization via Laser Ablation
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Solution Overview
Problem
Existing design and manufacturing modalities for implants face challenges such as lack of bone and soft tissue integration, complex and costly shaping and surface conditioning processes, and issues with machining hard ceramics and removing toxic chemical residues.
Innovation Solution
The technology involves efficiently designing, shaping, conditioning, and functionalizing implants with specific macroscale, microscale, and nanoscale features to enhance tissue integration. This includes machining precise textures and topographies using laser processes and applying coatings to support integration with bone and soft tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional shaping and surface conditioning technologies are used, then implants can be manufactured, but the processes become complex, expensive, and require long machine lead times
Solution Approach 1:
The patent combines multiple separate manufacturing operations (shaping, heat treatment, surface conditioning, and functionalization) into a single integrated laser processing step. The laser system performs all these functions sequentially on the implant without requiring the workpiece to be removed between operations, thereby simplifying the overall manufacturing process and reducing machine lead times while maintaining comprehensive implant preparation.
Solution Approach 2:
The laser processing system is designed to perform multiple functions using a single device: it shapes the implant geometry, applies heat treatment, creates surface textures at various scales, and applies functional coatings. This multi-functional approach eliminates the need for multiple specialized machines and operators, reducing both process complexity and manufacturing costs.
2Productivity
If fiber lasers are used for surface processing, then machining speed improves, but heat-affected zones are created that may damage desired material properties
Solution Approach 1:
The patent employs ultra-short pulse laser processing where energy is delivered in extremely brief pulses (nanosecond or picosecond duration) with long intervals between pulses. This periodic action allows the material to cool and dissipate heat between pulses, preventing cumulative heat buildup and heat-affected zones while maintaining high processing speeds. The pulsed regime enables precise energy delivery without damaging the material's desired properties.
3Manufacturing precision
If aggressive chemicals are used for etching, then surface texture can be created, but chemical depletion occurs and toxic residues remain requiring extensive cleaning
Solution Approach 1:
The patent replaces chemical etching processes with laser-based surface texturing. The laser beam directly modifies the material surface through ablation and melting mechanisms, creating precise micro and nano-scale textures without introducing any chemical substances. This substitution eliminates all concerns about chemical depletion, toxic residues, and extensive cleaning requirements while achieving superior surface texture control and precision.
4Reliability
If hard ceramics are used for implants, then biocompatibility improves, but machining efficiency decreases requiring specialized tools
Solution Approach 1:
The patent uses laser processing instead of mechanical machining methods (boring, milling, turning) to shape and texturize hard ceramic implants. The laser beam interacts with the ceramic material through ablation and localized melting, enabling efficient shaping without mechanical contact. This approach eliminates the need for specialized hardened steel, carbide, or polycrystalline diamond tools, significantly improving machining efficiency while maintaining the biocompatibility of the ceramic material.
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 approach enhances tissue integration and adhesion of implants, reduces manufacturing complexities and costs, and ensures the safety and efficacy of medical devices by minimizing toxic residues and improving material properties.
Implementation Method 1
The first functionalized surface including a first macroscale shape and a first microscale texture can be formed onto the first macroscale shape... machining the first microscale texture based at least in part on the description of the first microscale texture
Data Source
AI summary
Various implementations of implants and implant surfaces for clinical rehabilitation or enhancement of a patient, related systems, and computer programs and methods for the design and manufacturing of implants are disclosed. A macroscale shape, a microscale surface texture, and a nanoscale surface topography are overlaid to increase, condition, and thereby functionalize an implant surface. A thin-film coating and/or laser interferometry is utilized to overlay on a machined implant substrate a nanoscale surface topography. Manufacturing the macroscale shape and the microscale texture may be performed with an ultrashort pulsed laser system in separate process steps. The design of a dental implant may be assisted by a self-learning computer program product, based on trained coupled shape models including, for example, mesh-based statistical shape and orientation models.