Multiplex Thread Dental Implant Root Design
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Solution Overview
Problem
Conventional artificial roots for dental implantation face challenges such as micro-motion between the bone and implant, leading to osseointegration failure, excessive heat generation during threading, and complex manufacturing processes that require multiple cutting tools, compromising the security and smoothness of the thread profile.
Innovation Solution
A multiplex thread structure with a first and second thread, where the second thread's width increases as the first thread's width increases, providing axial compression and increased contact area, and a manufacturing method using two cutting tools with parametrically varied pitches to form the threads, reducing lateral pressure and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional threads are used on artificial roots, then the threading process generates excessive heat that damages bone tissue, but reducing threading speed increases surgery time
Solution Approach 1:
The patent applies parameter changes by varying the thread pitch along the length of the artificial root. The thread transitions from a fine pitch at the distal end to a coarse pitch at the proximal end, which changes the mechanical interaction parameters during threading. This allows faster threading speed while controlling heat generation through the optimized pitch variation that reduces friction and improves bone engagement.
2Manufacturing precision
If multiple cutting tools are used to create varied thread profiles, then the thread manufacturing becomes complex and requires frequent tool changes, but using a single tool compromises the thread profile smoothness
Solution Approach 1:
The patent applies dynamics by using a single cutting tool with variable pitch capability. The cutting tool's pitch is dynamically adjusted during the manufacturing process to create the varied thread profile along the artificial root length. This allows the system to maintain manufacturing precision with a single tool by changing the tool's operational parameters rather than changing the tool itself.
3Reliability
If conventional threads are used on artificial roots, then the thread structure is simple to manufacture, but it cannot provide sufficient axial compression and contact area for secure osseointegration
Solution Approach 1:
The patent applies segmentation by dividing the thread structure into multiple sections with different pitch characteristics along the length of the artificial root. Each section serves a specific function: the distal end with fine pitch provides initial engagement, while the proximal end with coarse pitch provides axial compression. This segmented approach enhances osseointegration security by providing functional variation without requiring completely different thread designs.
Solution Approach 2:
The patent applies dimensionality change by varying the thread pitch along the longitudinal dimension of the artificial root. Instead of using a uniform two-dimensional thread pattern, the design incorporates a three-dimensional pitch variation that creates different engagement characteristics at different positions along the root, thereby increasing contact area and axial compression in a systematic way.
4Reliability
If the thread pitch is uniform along the artificial root, then the manufacturing process is simple, but it cannot provide optimized engagement at different positions for preventing micro-motion
Solution Approach 1:
The patent applies parameter changes by systematically varying the thread pitch parameter along the length of the artificial root. The pitch is adjusted to provide optimized engagement at different positions, with finer pitch at the distal end for initial stabilization and coarser pitch at the proximal end for strong axial anchoring. This parameter variation enhances micro-motion prevention while remaining manufacturable through controlled pitch adjustment.
Data Source
AI summary
An artificial root for dental implantation comprises a neck portion, an end portion opposite the neck portion, a body portion and a multiplex thread structure which is formed on the body portion. The multiplex thread structure comprises a first thread and a second thread in which the first thread forms a root portion with a specific first width for the second thread, which has a crest portion of a specific second width, to be accommodated into the root portion. The multiplex thread structure is partially configured in such a way that the second width of the crest portion is simultaneously increased when the first width of the root portion is gradually increased.