Octagonal Dental Implant Socket with Segmented Contact Surfaces
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Solution Overview
Problem
Existing dental implants face challenges in maintaining the stability of the abutment position during screwing into the jawbone due to material welding or shifting caused by the insertion tool, leading to potential misalignment and increased torque forces that can result in deformation or jamming.
Innovation Solution
A dental implant with a socket arrangement featuring first and second contact surfaces at the same height, allowing for longer arm levers and reduced force transmission at the second contact surfaces, which are designed to engage with the insertion tool, while the first contact surfaces provide a larger area for the abutment, minimizing material strain and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same lateral contact surfaces are used for both abutment positioning and insertion tool engagement, then the structure is simpler, but material welding or shifting occurs causing misalignment
Solution Approach 1:
The socket arrangement is segmented into two distinct functional zones: first lateral contact surfaces (3) for abutment positioning and second lateral contact surfaces (2a, 2b) for insertion tool engagement. This segmentation prevents material welding or shifting between the two functions while maintaining structural integrity.
Solution Approach 2:
Different regions of the socket arrangement are given different geometric properties optimized for their specific function. The first lateral contact surfaces have a geometry optimized for abutment retention, while the second lateral contact surfaces have a geometry optimized for torque transmission during insertion, allowing each region to perform its function without interfering with the other.
2Reliability
If the second contact surfaces are placed inside the coronal end closer to the center axis, then the abutment positioning is protected, but higher contact forces occur increasing welding risk
Solution Approach 1:
The second lateral contact surfaces are positioned not only radially but also longitudinally within the coronal end, creating a three-dimensional distribution of contact surfaces. This spatial arrangement allows the second contact surfaces to engage the insertion tool at an optimal distance from the center axis, providing sufficient torque transmission while protecting the first contact surfaces from excessive forces.
3Reliability
If two totally separate parts of the socket arrangement are milled outside and inside the coronal end, then abutment positioning is protected, but production becomes more difficult and expensive
Solution Approach 1:
The first and second lateral contact surfaces are merged into a single integrated socket arrangement structure within the coronal end of the implant. This unified structure can be manufactured in one machining operation rather than requiring separate operations for internal and external features, reducing production complexity and cost while maintaining the functional separation needed for reliability.
4Length of moving object
If higher contact forces are used to produce necessary torque, then the lever arm is shorter, but the welding risk and deformation increase
Solution Approach 1:
The socket arrangement is pre-configured with optimally positioned second lateral contact surfaces that provide sufficient lever arm length before insertion. This preliminary geometric configuration ensures that during the insertion process, the required torque can be transmitted through the second contact surfaces without generating excessive contact forces that would cause material welding or deformation.
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
Dental implant (1) having a socket arrangement having the shape of a regular octagon which is partly interrupted by outwardly extending notches (2) being parallel or parallel and partly inclined with respect to the longitudinal center axis of the implant (1), the inclination being such as to taper inwardly from their coronal end, wherein interrupting and outwardly extending ridges extending from the notches (2) in an apical direction of the dental implant (1), first contact surfaces (3) being adapted to engage and rotationally secure an abutment, and wherein second contact surfaces (2a, 2b) extend from the notches (2) within the ridges in the direction of the longitudinal center axis, the second contact surfaces (2a, 2b) being adapted to engage with an insertion tool (11); and wherein the notches (2) are positioned at sides or at corners of the regular octagon.