Superimposed Dual-Thread Dental Implant for Bone Anchoring
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Solution Overview
Problem
Existing dental implants often fail to achieve stable anchoring in the jawbone within a short period of time, despite various thread designs, leading to potential loosening and instability.
Innovation Solution
A dental implant with an external thread formed by the superimposition of a coarse first thread and a fine second thread, where the second thread extends beyond the first thread and has a larger pitch diameter, increasing the surface area for better bone integration and preventing loosening, combined with a cylindrical and conical threaded section for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-thread design is used, then the device complexity is low, but the anchoring stability is insufficient
Solution Approach 1:
The patent combines two separate threads (first thread and second thread) into a single external thread structure. The first thread has a larger pitch diameter and provides initial anchoring, while the second thread has a smaller pitch diameter and provides fine adjustment and additional anchoring. This merging of multiple thread functions into one unified structure resolves the contradiction by achieving stable anchoring without requiring separate thread components.
Solution Approach 2:
The external thread is designed as a composite structure with two different thread patterns superimposed on each other. The first thread and second thread have different pitch diameters and thread depths, creating a composite thread profile that combines the advantages of both coarse and fine threading, thereby improving anchoring stability while maintaining a single-thread design.
2Strength
If the thread depth is increased to improve anchoring, then the anchoring strength is improved, but the stress on bone tissue increases
Solution Approach 1:
The patent applies different thread depths at different locations along the implant body. The first thread has a greater thread depth for providing strong anchoring, while the second thread has a smaller thread depth for fine adjustment and distributing stress. This local differentiation of thread quality allows the implant to achieve strong anchoring while minimizing stress concentration on the bone tissue.
Data Source
Figure 1~2
Figure 3
AI summary
The implant (10) has a body (14) provided with an external thread (26) that comprises two threads (32, 34), where the external thread extends up to an area of an implant neck (12). The threads are superimposed on each other in a partial area of the external thread, where one of the threads has a smaller distance from pitch to pitch than the other thread. A longitudinal groove is formed by side walls that are arranged at an angle to each other. The external thread has a cylindrical thread section attached to a conical thread section.