Jaw Implant With Asymmetric Thread Wedge Angles
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Solution Overview
Problem
Conventional dental jaw implants with inclined implant abutments face challenges in non-axial force introduction due to unsuitable conventional threads, which can lead to inadequate support and integration in the jaw bone when implanted at angles other than transverse to the occlusal plane.
Innovation Solution
A jaw implant with an oval opening at the top end, inclined at 75° to 45°, featuring a wedge-shaped external thread structure with a varying tilt angle along the circumference, providing increased support by distributing force over a larger area through a lead that is more parallel to the force introduction axis on the long side and perpendicular on the short side, allowing for better integration and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the implant abutment is fixed at an angle with respect to the jaw implant to accommodate non-transverse implantation, then the implant can be placed in positions constrained by jaw bone anatomy and nerve tracts, but non-axial force introduction occurs which conventional threads are not well suited for
Solution Approach 1:
The lead is designed with different wedge angles on different sides: the first side (long side) has a smaller wedge angle to be more parallel to the force introduction axis for axial force distribution, while the second side (short side) has a larger wedge angle for perpendicular force distribution. This local differentiation allows the single thread structure to handle both axial and non-axial forces effectively.
Solution Approach 2:
The lead exhibits asymmetric geometry with respect to the axial line, with the first side having a different wedge angle than the second side. This asymmetry is specifically designed to accommodate the inclined opening plane (75° to 45°) and distribute forces appropriately along the inclined implant-abutment connection, resolving the contradiction between placement flexibility and force distribution reliability.
2Ease of manufacture
If conventional threads are used on the implant body, then the manufacturing is simplified, but they are not well suited for non-axial force introduction when the implant abutment is inclined
Solution Approach 1:
The lead parameters are specifically optimized with varying wedge angles along its circumference. The wedge angle is smaller on the long side and larger on the short side, creating a parameter gradient that enables the thread to resist both axial and non-axial forces effectively while maintaining manufacturability through continuous screw line geometry with constant pitch.
3Adaptability or versatility
If the opening plane is inclined at 75° to 45° with respect to the axial line to accommodate angled abutment placement, then the implant can support inclined abutments, but the force distribution becomes non-uniform requiring specialized thread design
Solution Approach 1:
The lead is segmented into two distinct sides with different wedge angles: the first side (long side) with smaller wedge angle for axial force components, and the second side (short side) with larger wedge angle for perpendicular force components. This segmentation allows the complex force distribution requirements to be addressed through a relatively simple continuous screw line thread structure.
Data Source
AI summary
A jaw implant includes an implant body comprising a top end, a base end, an axial line, an acute-angled long side, an obtuse-angled short side, a body core. An oval opening disposed at the top end comprises an opening edge lying in an opening plane inclined with an angle of inclination of 75° to 45° with respect to the axial line so that the implant body has an axial length on the acute-angled long side longer than on the obtuse-angled short side. An external thread structure comprises a lead comprising a lower side facing the base end, an upper side facing the top end, and a wedge angle disposed between the upper side and the lower side. A bisecting line of the wedge angle and the axial line of the implant body form a tilt angle which is smaller on the acute-angled long side than on the obtuse-angled short side.