Dental Implant Torque Transmission Surface Design
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Solution Overview
Problem
Existing dental implant insertion tools often experience jamming and deformation due to manufacturing tolerances, leading to inefficient torque transmission and increased rotational play between the implant and abutment, which complicates the insertion and removal processes.
Innovation Solution
The design of a dental implant and insertion tool system where the anti-rotation and torque transmission surfaces are arranged to rotate relative to each other, allowing for maximum contact and improved force distribution by utilizing the inherent rotational play, with non-matching profiles to align surfaces optimally during torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the anti-rotation means of the insertion tool and implant are designed with identical cross-sectional contours to ensure precise alignment, then torque transmission is optimized, but manufacturing tolerances cause edge-to-face contact instead of face-to-face contact, leading to local deformation and jamming
Solution Approach 1:
The anti-rotation means are divided into two separate functional components: an anti-rotation surface on the implant and a torque transmission surface on the insertion tool. This segmentation allows each surface to be optimized independently - the anti-rotation surface ensures precise rotational alignment while the torque transmission surface provides a larger contact area for reliable force transmission, eliminating the jamming and deformation problems caused by identical contour designs
Solution Approach 2:
The invention introduces asymmetric design where the anti-rotation surface and torque transmission surface have different geometries and orientations. The anti-rotation surface has a specific contour for precise alignment, while the torque transmission surface is designed with a larger contact area at a different angular position, creating an asymmetric configuration that simultaneously achieves precise alignment and reliable torque transmission without the drawbacks of symmetric identical contours
2Manufacturing precision
If manufacturing tolerances are reduced to achieve exact fit between anti-rotation means, then face-to-face contact is achieved, but the complexity and cost of manufacturing increase significantly
Solution Approach 1:
By separating the anti-rotation function from the torque transmission function into distinct surfaces, the invention allows each component to be manufactured within standard tolerances. The anti-rotation surface ensures alignment while the torque transmission surface compensates for minor dimensional variations, eliminating the need for expensive tight-tolerance manufacturing while maintaining high fit accuracy
Solution Approach 2:
The torque transmission surface acts as an intermediary element that mediates between the anti-rotation surface and the applied torque. This intermediate surface with its larger contact area absorbs manufacturing tolerances and variations, allowing standard manufacturing processes to produce components that still achieve reliable face-to-face contact and torque transmission
3Stability of the object's composition
If the anti-rotation surfaces are designed with matching profiles for precise alignment, then rotational play is minimized, but the insertion tool may jam within the implant due to local deformation from concentrated forces
Solution Approach 1:
The functional separation of anti-rotation surface and torque transmission surface allows the anti-rotation surface to be optimized for minimal rotational play through precise contour matching, while the torque transmission surface with its larger contact area distributes forces to prevent local deformation and jamming, thereby maintaining both rotational stability and ease of operation
Solution Approach 2:
The asymmetric positioning and geometry of the torque transmission surface relative to the anti-rotation surface creates a design where precise rotational alignment is achieved through the anti-rotation surfaces, while the offset torque transmission surface provides a mechanical advantage that reduces insertion forces and prevents jamming, improving ease of operation without compromising stability
4Device complexity
If standard anti-rotation means with identical cross-sections are used, then the design is simple and manufacturing is easy, but torque transmission efficiency is reduced due to edge-to-face contact from manufacturing tolerances
Solution Approach 1:
The invention segments the torque transmission function from the anti-rotation function, creating a dedicated torque transmission surface with larger contact area. This segmentation maintains relatively simple overall design while significantly improving torque transmission efficiency by eliminating edge-to-face contact and distributing forces across a broader surface, thereby achieving higher power transmission without excessive complexity
Data Source
Figure 1~1B
Figure 2~2B
Figure 3~3B
AI summary
The present invention relates to a combination of a dental implant and an insertion tool for inserting the dental implant into a bone of a patient. The dental implant comprises an anti-rotation means having a non-circular cross-sectional contour which comprises at least one planar force transmission surface in the form of an anti-rotation surface (7a, 7b, 7c, 7d). The insertion tool comprises an anti-rotation means having a non-circular cross-sectional contour which comprises at least one planar force transmission surface in the form of a torque transmission surface (11a', 11a"; 11b', 11b"; 11c', 11c"; 11d', 11d").