Customized Dental Implant Abutment Positioning via Sectional Surface
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Solution Overview
Problem
Existing implant abutments lack precision in customization and positioning during processing, failing to accurately match individual patient teeth characteristics, which affects the load transfer and fit with adjacent teeth and gum conditions.
Innovation Solution
The abutment design includes a body with a combination portion, threaded portion, coupling hole, and sectional surfaces for precise positioning and fixation in a processing device or jig, allowing for customized abutment production with improved precision and accuracy without clamping or gripping the outer surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If generic abutments with fixed sizes are used, then manufacturing simplicity is maintained, but customization precision and fit to individual patient teeth characteristics deteriorate
Solution Approach 1:
The abutment is divided into multiple functional segments: a body portion for customization, a combination portion for fixture attachment, a coupling portion for crown connection, and a sectional surface for positioning. This segmentation allows each part to be optimized independently - the body can be customized while maintaining standardized interface portions, thus improving customization precision without proportionally increasing overall complexity
Solution Approach 2:
The abutment design incorporates universal interface portions (combination portion with threaded hole, coupling portion) that can be used across different patient cases while the body portion is customized. The fixing screw and coupling unit serve multiple functions - securing the abutment to the fixture and providing positioning references, thereby reducing the need for additional specialized components
2Manufacturing precision
If clamping or gripping of the outer surface is used for positioning, then positioning force is sufficient, but positioning precision and accuracy deteriorate due to surface deformation
Solution Approach 1:
Instead of applying clamping force to the outer surface, the positioning function is extracted and implemented through the sectional surface - a dedicated feature with a specific geometric shape that engages with a corresponding feature in the processing device. This separates the positioning function from the outer surface, allowing precise positioning without deforming the outer surface
Solution Approach 2:
The sectional surface acts as an intermediary element between the abutment and the processing device. Rather than directly clamping the outer surface, the positioning is achieved through the engagement of the sectional surface with its corresponding feature in the processing device, protecting the outer surface from deformation while still achieving secure positioning
3Manufacturing precision
If multiple processing steps are used for customization, then customization precision is improved, but manufacturing throughput deteriorates
Solution Approach 1:
The abutment body is pre-customized with the specific geometric shape corresponding to the patient's teeth characteristics before the processing steps. The sectional surface is also pre-formed with the exact positioning geometry needed. This preliminary customization allows subsequent processing steps to be performed more efficiently with fewer adjustments, improving throughput while maintaining precision
Solution Approach 2:
The abutment design includes self-positioning features through the sectional surface that automatically align the abutment in the processing device without requiring complex alignment procedures or multiple adjustment steps. The fixing screw and coupling unit also provide self-aligning characteristics, reducing the number of processing steps needed while maintaining high precision
Data Source
AI summary
An abutment connecting a crown that forms an external form of an artificial tooth to a fixture embedded in a gum of a human, having a body, a combination portion formed at an end of the body and combined with the fixture, a threaded portion formed at the body and penetrating through the body, a fixing screw being inserted into the threaded portion to couple the body to a processing device or a jig, a coupling hole formed at the body and penetrating through the body, a coupling unit being inserted into the coupling hole to connect the body and the fixture, and a sectional surface formed at an opposite portion to the combination portion and connected to the processing device or the jig, to position the body in the processing device or in the jig when the body is coupled to the processing device or the jig.