Prosthesis Base With Injection Channels For Dental Bonding
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Solution Overview
Problem
The connection of artificial teeth to a prosthesis base is challenging, especially when there is insufficient space for adhesive, leading to the need for tooth shortening or post-processing, and wax-based models can lose accuracy due to melting, affecting the fit of recesses.
Innovation Solution
A prosthesis base with precisely fitting recesses and channels for accommodating artificial teeth, where the channels allow for the introduction of hardening or setting materials to create a secure connection, and the use of CAD/CAM methods ensures accurate geometry and minimal material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is used to connect artificial teeth to prosthesis base, then connection strength is improved, but insufficient space in recesses requires tooth shortening or removal
Solution Approach 1:
The invention transitions from a two-dimensional surface connection (adhesive on tooth surface) to a three-dimensional volume connection (adhesive injected through channels into recesses). By creating vertical channels that extend into the recesses, the adhesive gains additional dimensional space to bond, eliminating the need to shorten the tooth while maintaining strong connection.
Solution Approach 2:
The channels act as intermediaries that facilitate adhesive delivery from the external environment into the recesses. These channels serve as conduits that bridge the gap between the adhesive application point and the bonding interface, enabling precise adhesive placement without requiring tooth modification.
2Ease of operation
If wax is melted to insert teeth into wax base, then ease of operation is improved, but accuracy of fit of recesses deteriorates due to shape changes
Solution Approach 1:
The channels are pre-formed in the wax base before the teeth insertion process. This preliminary action ensures that the structural framework and recesses are already in their precise final positions, so subsequent melting and insertion operations cannot displace them. The critical geometric features are established before any thermal processing occurs.
Solution Approach 2:
The wax base is segmented into functional zones: the precisely-formed recesses and channels that maintain geometric integrity, and the meltable wax material that provides ease of insertion. This segmentation allows different parts of the wax base to serve different functions during the tooth insertion process.
Data Source
Figure 1~5
Figure 6
AI summary
The invention relates to a prosthesis base which is made entirely or partly of a prosthesis material and/or wax and the upper face of which is provided with at least one substantially custom-fit recess (3) for accommodating portions of an artificial tooth (1). According to the invention, at least one duct (5) which runs into the recess (3) is formed in the prosthesis base (2). The invention further relates to a method for integrally bonding an artificial tooth (1) to a prosthesis base (2) which is made entirely or partly of a prosthesis material and/or wax and is provided with at least one substantially custom-fit recess (3) for accommodating portions of the artificial tooth (1).