Angular Abutment Series for Dental Implant Alignment
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Solution Overview
Problem
Current dental abutments with rotational asymmetry have limited freedom in varying the angle of positioning and securing to dental implants, leading to difficulties in aligning dental prostheses with the unique structure of a patient's mouth, and existing polygonal connections like hexagonal adapters restrict angular positioning to only a few options, necessitating complex adjustments that can damage the abutment or require individual customization.
Innovation Solution
A series of at least three angled abutments with unique offset angles, allowing for finer tuning of angular positioning, and a computerized system for selecting the appropriate abutment based on patient-specific parameters, enabling precise alignment without damaging the abutment or requiring extensive grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polygonal rotation preventive adapter (e.g., hexagonal) is used to secure the abutment to the implant, then the abutment is firmly fixed to the implant, but the angular positioning is restricted to only a few discrete options
Solution Approach 1:
The rotation preventive adapter is segmented into multiple discrete angular positions (e.g., hexagonal with 6 positions). This segmentation provides reliable fixation at each position while allowing selection among multiple angular options, resolving the contradiction between fixation stability and positioning freedom.
Solution Approach 2:
The abutment design incorporates the ability to rotate and select among multiple fixed angular positions before final tightening. This dynamic selection process allows the clinician to optimize the angular position for prosthesis alignment while maintaining secure fixation once positioned.
2Manufacturing precision
If the abutment has rotational asymmetry for precise angular positioning, then the prosthesis alignment accuracy is improved, but the number of available angular positions is limited
Solution Approach 1:
The abutment features rotational asymmetry with specific geometric features (e.g., flat surfaces, protrusions, or markings) at predetermined angular positions. This asymmetry enables precise alignment accuracy at each position while the multiple asymmetric features provide several discrete angular options for positioning.
3Manufacturing precision
If complex adjustments are made to achieve precise angular positioning, then the prosthesis alignment is improved, but the abutment may be damaged or require individual customization
Solution Approach 1:
The abutment is pre-manufactured with multiple predetermined angular positions and corresponding geometric features. This preliminary preparation eliminates the need for complex post-manufacturing adjustments or individual customization, allowing precise positioning to be achieved through simple selection and installation.
Data Source
AI summary
A series of at least three abutments for dental use and a method for selection and aligning an abutment therefrom in a patient mouth. The series comprises at least three abutments. Each abutment composes a mate of a polygonal rotation preventive adapter having an axis of rotation perpendicularly to a lateral cross section, and a support member extending from a proximal end of the mate and having rotational symmetry to the axis of rotation. A projection of the support member on a plane of the lateral cross section in at least one abutment, is asymmetric with respect to angle bisectors and medians of the polygonal shape. An angle between a straight line extending from the axis of rotation to a reference point on a projection circumference of the support member forms a unique offset angle with a side of the polygonal shape per each dental abutment in the series.