Dental Implant Assembly with Multi-Profile Threaded Base
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Solution Overview
Problem
Conventional dental implants face challenges in anchoring stability and anti-rotation, particularly due to varying bone density across different age groups, leading to improper osseointegration and potential slippage of the implant and abutment or crown.
Innovation Solution
A dental implant assembly with a base member featuring a plurality of threaded profiles, including a V-grooved thread on the collar, a buttress thread on the mid-portion, and a macro thread on the apical region, designed to cut into the jawbone for primary stability, along with cut-outs for tissue integration and a secure abutment attachment using fasteners to prevent rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-thread-profile implants are used, then the implant structure is simple, but the anchoring stability is insufficient due to varying bone density
Solution Approach 1:
The implant's outer surface is divided into multiple threaded profiles (first, second, and third threaded profiles) with different geometries located at different axial positions. Each threaded profile is designed to engage with bone tissue of varying density at specific regions, providing optimized anchoring stability for different bone conditions without requiring multiple separate implant components.
Solution Approach 2:
Different threaded profiles are assigned to different regions of the implant: the first threaded profile (coarse pitch) for apical regions with denser bone, the second threaded profile (medium pitch) for mid-regions, and the third threaded profile (fine pitch) for coronal regions with less dense bone. This local differentiation ensures each region's specific bone density requirements are met while maintaining overall implant stability.
2Reliability
If conventional implants without anti-rotation features are used, then the implant structure is simpler, but the implant may slip relative to the abutment or crown
Solution Approach 1:
At least one threaded profile incorporates an asymmetric cross-sectional geometry with non-uniform thread depth or pitch distribution around the circumference. This asymmetric configuration creates mechanical interlocking that prevents rotational movement of the implant relative to the abutment or crown, providing anti-rotation stability through the threaded structure itself without adding separate anti-rotation components.
3Reliability
If implants with uniform thread profiles are used, then manufacturing is simpler, but tissue growth occurs in an unplanned way during osseointegration
Solution Approach 1:
The implant is pre-designed with specific threaded profiles and geometric features that guide and control tissue growth patterns during osseointegration. The varying thread pitches and depths create predetermined pathways and zones that direct bone ingrowth in a controlled manner, ensuring predictable osseointegration outcomes before the actual healing process begins.
Solution Approach 2:
The implant utilizes three-dimensional geometric variations in the threaded profiles, including changes in thread depth, pitch, and angular orientation along the axial length. These dimensional variations create distinct zones that control tissue interaction at different depths and angles, enabling planned and predictable tissue growth patterns during osseointegration rather than random growth.
Data Source
AI summary
A dental implant assembly comprises, a base member which is rotatably insertable into a jaw-bone. The base member may be defined by a collar portion, a mid-portion and an apical region. The base member in entirety may be configured with a tapered configuration right from the mid-portion to the apical region. Further, the base member is defined with a plurality of threaded profiles on an outer surface. A first thread profile is defined on the collar portion. A second thread profile, defined on the mid-portion and a third thread profile, defined on the apical region. The third thread profile is configured to cut into the jaw-bone during insertion to anchor the base member. As the third thread profile cuts in to the jaw bone, the second thread profile forms a threaded hole within the drilled hole in order to securely anchor the base member within the jaw bone.