Dental Implant Post Interface Geometry for Secure Attachment
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Solution Overview
Problem
The existing superstructure support systems in dental implantology face challenges in securely and simply joining and separating interface components between the implant post and attachment elements, leading to difficulties in repeated placement and removal of prosthetic tooth replacements without tilting or excessive force.
Innovation Solution
A superstructure support system featuring a hollow implant post, a hollow implant pin, and an implant flange with angled cavity zones, allowing for a rotationally fixed attachment element with interlocking and frictional interface geometries, enabling secure and easy assembly and disassembly of prosthetic tooth replacements, fabricated using powder injection molding with titanium alloy Ti6Al4V and further processed for precise mechanical and optical machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional superstructure support systems are used, then the basic structural support function is achieved, but the joining and separating of interface components becomes difficult and insecure
Solution Approach 1:
The interface geometry is segmented into multiple functional zones: an interlocking geometry area with protrusions and recesses for mechanical engagement, and a support enveloping surface area for frictional contact and adhesive bonding. This segmentation allows the interface to provide both secure fixation and easy assembly/disassembly through distinct functional regions.
Solution Approach 2:
The interface geometry employs asymmetric design where the attachment element has protrusions that correspond to recesses in the superstructure support, creating a non-reversible interlocking mechanism that ensures secure fixation while allowing controlled assembly and disassembly through specific directional movements.
2Adaptability or versatility
If repeated placement and removal of attachment elements is required, then adjustability is improved, but tilting and excessive force occur during assembly
Solution Approach 1:
The interface geometry is pre-designed with alignment features including the angled cavity zones (160-186 degrees) and enveloping surfaces that guide the attachment element into proper orientation during assembly. This preliminary geometric configuration prevents tilting and reduces assembly force by automatically aligning components before final engagement.
Solution Approach 2:
The support enveloping surface acts as an intermediary between the interlocking geometry areas, providing a frictional contact zone that facilitates smooth assembly and disassembly. This intermediate surface allows controlled movement and reduces peak forces by distributing contact over a larger area during the assembly process.
3Device complexity
If simple joining mechanisms are used, then device complexity is reduced, but the security and stability of the connection deteriorates
Solution Approach 1:
The interface geometry merges multiple joining mechanisms into a single integrated structure: mechanical interlocking through protrusions and recesses, frictional contact through enveloping surfaces, and adhesive bonding zones. This combination provides secure and stable connections while maintaining relatively simple device complexity by integrating functions rather than adding separate components.
Data Source
AI summary
The invention relates to a superstructure support (20) as part of a prosthetic tooth replacement (1) between an implant body (10) and a superstructure, comprising a hollow implant post (23, 150, 160, 170, 180, 190), a hollow implant pin (50), and an implant flange (31) lying therebetween. The cavity zones (67, 62) of the implant post (23, 150, 160, 170, 180, 190) and of the implant pin (50) transition into each other. The center lines (69, 63) include an angle of 60 to 86 angular degrees. An attachment element (5) can be arranged on the implant post (23, 150, 160, 170, 180, 190) in a rotationally fixed manner by means of an assembly joint (140), which forms an interface (141, 145). The attachment element (5) is a cap-type element. At least some areas of the implant flange (31) have a supporting enveloping surface (37). The attachment element (5) has an interface geometry (146), which can be mounted on the interface geometry (142) of the superstructure support (20) in an interlocking and/or frictional manner at least in some areas. By means of the invention, a superstructure support (20) for the prosthetic tooth replacement is improved in such a way that the interface between the implant post (23, 150, 160, 170, 180, 190) and the attachment element (5) enables secure and simple joining and disconnecting of the interface components.