Lithium Disilicate Glass Ceramic Ear Implant for Vibration Transmission
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Solution Overview
Problem
Existing middle ear implants face challenges such as reduced vibration transmission due to new bone growth, difficulty in adapting to the implantation site, and increased secondary ossification, which affects long-term performance and signal transmission.
Innovation Solution
The use of lithium disilicate glass ceramic material, doped with P2O5 and ZrO2, for middle ear implants, which provides excellent vibration transmission, biocompatibility, and adaptability, while minimizing secondary ossification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If titanium or titanium alloys are used for middle ear implants, then strength and formability are improved, but new bone growth (osteoinduction) occurs leading to reduced vibration transmission
Solution Approach 1:
The patent uses lithium disilicate glass ceramic material with P2O5 and ZrO2 doping to create a composite material that combines the strength needed for implants with the property of not inducing osteoinduction, thereby maintaining vibration transmission capability while avoiding new bone growth
2Strength
If titanium is used for middle ear implants, then strength is improved, but adaptability to implantation site is reduced due to inability for short-term processing
Solution Approach 1:
The patent changes the material parameters from metal (titanium) to glass ceramic (lithium disilicate with P2O5 and ZrO2 doping), which fundamentally alters the processing characteristics while maintaining mechanical strength, enabling short-term processing and adaptation to implantation sites
3Reliability
If ceramic materials are used for middle ear implants, then vibration transmission is improved, but secondary ossification increases over time
Solution Approach 1:
The patent applies local quality by doping specific regions or the entire glass ceramic material with P2O5 and ZrO2 to create localized or global modifications that prevent osteoinduction and secondary ossification while maintaining the vibration transmission properties of the ceramic material
4Ease of manufacture
If early plastic materials are used for middle ear implants, then ease of manufacture is improved, but durability is reduced
Solution Approach 1:
The patent transitions from simple plastic materials to composite glass ceramic materials doped with P2O5 and ZrO2, which combine the manufacturability advantages of processed materials with the durability and vibration transmission properties of ceramic composites
Data Source
AI summary
The invention relates to an ear implant for improving or restoring the hearing ability in the event of defects in the area of the ossicles of the ear or posterior wall of the auditory canal, said implant consisting of lithium disilicate glass ceramic having a molar ratio of SiO2 to Li2O of 2 to 3, wherein the glass ceramic material being doped and stabilized with P2O5 and ZrO2, as well as a method for the production of the implant and the use of lithium disilicate glass ceramics in ear implants.