Dental Abutment Core Pillar Segmentation for Rotational Adjustment
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Solution Overview
Problem
Dental abutments face positioning errors due to fixed anti-rotational means, which prevent correction once the custom body is attached to the implant, leading to suboptimal placement.
Innovation Solution
A dental abutment core design with a pillar featuring anti-rotational means in the third portion, allowing the custom body to rotate and be fixed only after optimal orientation is achieved, using a cap to prevent biocompatible material from reaching the anti-rotational components during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anti-rotational means are fixed in the pillar, then the custom body is prevented from rotating, but positioning errors cannot be corrected
Solution Approach 1:
The pillar is divided into three distinct portions: a first portion with circular cross-section allowing rotation, a second portion with non-circular cross-section providing anti-rotational function, and a third portion. This segmentation allows the custom body to rotate around the first portion to achieve optimal positioning while the second portion prevents excessive rotation, resolving the contradiction between rotational freedom and anti-rotational stability.
Solution Approach 2:
The design transitions from a static anti-rotational structure to a dynamic system where the custom body can rotate around the first portion of the pillar during positioning, then becomes fixed by the anti-rotational means in the second portion once optimal orientation is achieved. This dynamic approach enables both positioning adjustment and final stabilization.
2Manufacturing precision
If the custom body is fixed before installation, then positioning errors occur, but adjustment is impossible
Solution Approach 1:
The first portion of the pillar with circular cross-section enables dynamic rotation of the custom body around it, providing adjustability during installation. Once the optimal position is achieved, the anti-rotational means in the second portion engage to fix the position, thereby achieving both adjustability and final positioning accuracy.
Solution Approach 2:
The design allows preliminary rotation and positioning adjustments around the first portion before the final fixation by the anti-rotational means in the second portion. This preliminary action phase enables optimal positioning to be achieved before permanent fixation occurs.
3Ease of manufacture
If biocompatible material reaches the anti-rotational components, then manufacturing complexity increases
Solution Approach 1:
The anti-rotational means in the second portion are designed to be accessible and functional without requiring biocompatible material to reach them. The cap covering the first portion allows biocompatible material to be poured without contaminating the anti-rotational components, extracting the anti-rotational function from the material-containing area and simplifying the manufacturing process while maintaining component reliability.
Data Source
AI summary
A dental abutment core with a prosthetic connection, a pillar and a shoulder located between the prosthetic connection and the pillar. The pillar has anti-rotational elements for preventing a custom body from rotating with respect to the dental abutment core. The pillar has a first portion adjacent to the shoulder, a second portion adjacent to the first portion, and a third portion farthest from the shoulder. A cross section of at least part of the first portion is circular and has an outer diameter which is lower than a cross section dimension of the second portion. The anti-rotational elements are located in the third portion. A method for manufacturing a dental abutment with such dental abutment core is also described.