Single Tooth Implant Base Body Segmented Recess Design
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Solution Overview
Problem
Existing single-tooth implants face challenges in secure screwing into the jawbone due to difficulties in precise alignment and torque application, particularly with varying hole diameters and angles, and complex manufacturing requirements for positive-locking elements.
Innovation Solution
A single-tooth implant design featuring a base body with an annular recess containing a guide section, a form-fitting section with cylindrical or conical shape, and a coronal end section, equipped with screwing-in elements that allow increased torque application and alignment, including polygonal surfaces for enhanced stability and simplified production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positive-locking elements are provided on the bottom of the annular recess and on the centering collar, then anti-rotation protection is improved, but manufacturing complexity increases and the depth available for centering and fixing is reduced
Solution Approach 1:
The annular recess is divided into three functional sections: a guide section at the apical end for alignment, a form-fitting section with cylindrical or conical shape for securing, and a coronal end section for additional positioning. This segmentation allows each section to perform its specific function optimally without requiring complex positive-locking elements distributed throughout the entire recess depth.
Solution Approach 2:
The invention extracts the positive-locking function from the centering collar and relocates it to the form-fitting section of the annular recess. The form-fitting elements are provided only in the form-fitting section, which has a larger diameter than the guide section, allowing sufficient depth for effective centering and fixing without requiring positive-locking elements at the bottom of the entire recess.
2Stability of the object's composition
If the full depth of the annular recess is used for centering and guiding the abutment, then connection stability is improved, but design freedom for form-fitting elements is reduced
Solution Approach 1:
The annular recess is segmented into a guide section with smaller diameter for alignment and a form-fitting section with larger diameter for securing. This segmentation provides sufficient depth in the form-fitting section for stable connection while allowing various design configurations for form-fitting elements, including cylindrical or conical shapes and different patterns of form-fitting protrusions and recesses.
Solution Approach 2:
Different sections of the annular recess have different diameters and functions: the guide section has a smaller diameter optimized for alignment, while the form-fitting section has a larger diameter optimized for securing the abutment with form-fitting elements. This local differentiation allows each section to perform its function optimally with appropriate design freedom.
3Force
If screwing-in elements are provided in the form-fitting section, then torque application capability is improved, but risk of damage to form-fitting elements increases
Solution Approach 1:
The form-fitting section is segmented to include both form-fitting elements for securing the abutment and screwing-in elements for torque application during base body insertion. The form-fitting elements are positioned to engage with the abutment, while the screwing-in elements are positioned to engage with the screwing-in tool, allowing simultaneous torque application and form-fitting engagement without interference.
Solution Approach 2:
The screwing-in elements are provided in advance in the form-fitting section, allowing the base body to be screwed into the jaw with increased torque before the abutment is inserted. This preliminary action ensures secure fixation of the base body without requiring subsequent torque application that could damage the form-fitting elements.
Data Source
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AI summary
The invention relates to a single tooth implant for a fixed dental prosthesis, said implant comprising a substantially cylindrical main part which can be inserted into a bore in a jaw bone; an abutment which can be inserted into the annular seat in the main part, said abutment having a bore for receiving a retaining screw and a securing head for the dental prosthesis; and a retaining screw which can be inserted into the blind hole of the main part and traverses the abutment.