Dental Implant Screw with Integrated Bone Graft Cover
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Solution Overview
Problem
Current methods for protecting bone graft materials during dental implant surgery, such as absorbable and non-absorbable barriers, and titanium mesh, face issues like incomplete coverage, increased surgery time, and complications like infection and additional surgeries, especially when alveolar bone defects are unilateral.
Innovation Solution
A screw design with a protective body featuring a horizontal and inclined plate cover part, secured by a connecting bolt, which covers and protects bone graft materials from both vertical and lateral pressures during dental implant placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If titanium mesh is used to cover the alveolar bone defect, then the bone graft material is protected from soft tissue movement, but the surgery time increases and the mesh cannot completely cover the defect
Solution Approach 1:
The invention merges the protective barrier function with the fixation screw into a single integrated component. The screw includes an integrated barrier that extends from the screw body to cover the bone defect, eliminating the need for separate titanium mesh and its associated bending and fastening steps, thereby reducing surgery time while maintaining protection reliability
Solution Approach 2:
The screw serves multiple functions simultaneously: it provides mechanical fixation of the implant and acts as a protective barrier for the bone graft material. This multi-functional design eliminates the need for separate protective components and reduces the number of surgical steps required
2Reliability
If titanium mesh is bent to cover the defect, then protection is provided, but the bending area protrudes excessively and causes infection risk
Solution Approach 1:
The barrier is designed with different geometric configurations at different locations - a first barrier portion and a second barrier portion with specific angles and extensions - to provide optimal coverage without excessive protrusion. The local geometric variations ensure complete defect coverage while maintaining a low profile that prevents gum breakthrough and infection
3Reliability
If non-absorbable barrier is used to protect bone graft material, then protection is maintained, but additional removal surgery is required
Solution Approach 1:
The barrier is designed to be absorbable, allowing it to perform its protective function and then naturally degrade and disappear over time. This self-service characteristic eliminates the need for a second surgical intervention to remove the barrier, reducing overall treatment complexity and patient burden
4Ease of operation
If absorbable barrier is used to protect bone graft material, then no removal surgery is needed, but the barrier may be absorbed too quickly or exposed prematurely
Solution Approach 1:
The barrier is constructed from composite materials with specific absorbable properties that provide controlled degradation. The material composition ensures the barrier maintains its protective function for the required duration of bone formation while eventually being safely absorbed, balancing ease of operation with reliable protection duration
5Strength
If separate screws are used to secure titanium mesh, then the mesh is fixed, but a wider gum incision is required for removal and causes edema and pain
Solution Approach 1:
The fixation function and protective barrier function are merged into a single screw component. The integrated barrier is part of the screw itself, eliminating the need for separate fixation screws and the associated wider incisions for their removal, thereby reducing edema and patient pain
Data Source
AI summary
The present invention relates to a screw for a dental implant, comprising: a body (122) in which a through hole (124) is formed in the vertical direction; and a cover part (129) formed at an edge on a top end of the body (122), wherein the cover part (129) comprises: a protective body (120) formed by including a horizontal plate (127) formed to have a predetermined area in the horizontal direction and an inclined plate (128) formed downward at an end of the horizontal plate (127); and a connecting bolt (140) that fixes the protective body (120) to a fixture (200) by passing through the through hole (124) to be fastened to the fixture (200) implanted in the alveolar bone, and thus, when the protective body (120) is fixed to the fixture (200) by means of the connecting bolt (140) in the process of implant placement surgery, the cover part (129) covers and protects a bone graft material (320) implanted around the fixture (200), thereby assisting in regeneration of the alveolar bone.