Titanium-Ceramic Dental Implant Joining Method
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Solution Overview
Problem
Dental implants face issues with metal elution and mismatching due to galvanic cell formation between titanium implants and metal portions of the crown restoration, leading to adverse effects on the living body and poor bonding strength.
Innovation Solution
A method involving the production of a dental implant with a titanium member and a ceramic member, where the titanium member has a protrusion and the ceramic member has a recess, both sintered together to enhance adhesion and prevent metal elution, using a specific binder content range to ensure strong fixation and prevent deformation during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the crown restoration has the metal portion to improve occlusion and prevent cracks, then the strength and durability are improved, but a galvanic cell is formed between the metal portion and titanium implant causing metal elution
Solution Approach 1:
A ceramic member is introduced as an intermediary barrier between the titanium implant and the metal portion of the crown restoration. The ceramic member has a metal-free contact surface that contacts the metal portion, preventing direct contact between titanium and metal, thereby eliminating the galvanic cell while maintaining the structural benefits of the metal reinforcement.
2Object-generated harmful factors
If the metal portion is fixed to the implant with a relatively large quantity of dental cement to prevent contact, then metal elution is prevented, but it becomes difficult to adjust the height and angle of the crown restoration and bonding strength is insufficient
Solution Approach 1:
The ceramic member serves as a precisely engineered intermediary component with a recess that receives the implant. This recess is designed with specific dimensional tolerances and geometric features that enable precise adjustment of height and angle during assembly, eliminating the need for excessive dental cement while achieving both metal isolation and manufacturing precision.
3Object-generated harmful factors
If the titanium implant is coated with insulating ceramic to prevent contact with metal portion, then metal elution is prevented, but the bondability between titanium and ceramic is poor resulting in mismatching
Solution Approach 1:
The system is segmented into distinct functional components: the titanium implant, the ceramic member with metal-free contact surface, and the metal portion of the crown. The ceramic member is a separate component with a recess designed to receive the implant, creating a mechanical interlock that provides strong bonding without requiring direct titanium-ceramic contact, thus avoiding the adhesion problems while maintaining metal isolation.
4Strength
If the titanium molded body and ceramic molded body are sintered together, then bonding strength is improved, but deformation may occur during the sintering process
Solution Approach 1:
The ceramic member is pre-formed with a recess that has predetermined dimensional tolerances and geometric features before sintering. The titanium implant is also pre-formed with corresponding features. This preliminary preparation ensures that when the components are assembled and sintered together, the mechanical interlock is already established, minimizing deformation and maintaining dimensional accuracy during the sintering process.
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
This method effectively prevents metal elution and mismatching, enhancing the mechanical stability and dimensional accuracy of the dental implant while maintaining high bonding strength between the titanium and ceramic components.
Implementation Method 1
a sintering step for sintering the assembled body thus degreased to transform the titanium degreased body into a titanium member as a sintered body and to transform the ceramic degreased body into a ceramic member as a sintered body so that the titanium member and the ceramic member are firmly fixed and joined together
Data Source
AI summary
A dental implant for preventing elution of metal when applied within an oral cavity and preventing the occurrence of mismatching (bumpy occlusion or the like) when fixed in place, and its manufacturing method are provided. The abutment is manufactured through steps including molding a titanium molded body composition to obtain a titanium molded body, molding a ceramic molded body composition to obtain a ceramic molded body, assembling the titanium molded body and the ceramic molded body together to obtain an assembled body, degreasing the assembled body so that the titanium molded body becomes a titanium degreased body and the ceramic molded body becomes a ceramic degreased body, and sintering the assembled body to transform the titanium degreased body into a titanium member and to transform the ceramic degreased body into a ceramic member so that the titanium member and the ceramic member are firmly fixed and joined together.