Dental Implant Post with Radiologic Cavity for Positioning
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Solution Overview
Problem
Existing methods for modeling dental implants using radiologic tests face challenges in accurately determining the position and orientation of posts due to the risk of incomplete mounting and dimensional errors, particularly because the transparent X-ray zone at the post-implant interface can lead to weakened joints and unclear radiologic differentiation.
Innovation Solution
A post with a closed cavity of different density within the biocompatible and radiologically visible material allows for accurate detection of position and orientation through radiologic tests, ensuring full fixation and proper placement by containing a substance visible under CAT or CBCT scans, which can be fluid or solid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transparent X-ray zone is incorporated at the post-implant interface to enable differentiation, then the post can be clearly distinguished from the implant in radiologic tests, but the joining zone is weakened and becomes prone to breakage
Solution Approach 1:
The post is segmented into multiple zones with different radiologic properties: a first zone with high radiologic density (for clear visibility), a second zone with intermediate density (for differentiation), and a third zone with low density (for secure implantation). This segmentation allows each zone to fulfill its specific function without compromising overall structural integrity.
Solution Approach 2:
The post is constructed as a composite structure with zones of varying radiologic densities, combining materials or material configurations that provide both radiologic distinguishability and mechanical strength. The composite design ensures that the transparent zone does not compromise the overall structural integrity of the post.
2Measurement precision
If a transparent X-ray zone is incorporated at the post-implant interface to enable differentiation, then the post can be clearly distinguished from the implant in radiologic tests, but it becomes difficult to determine whether the post is fully threaded onto the implant
Solution Approach 1:
The post incorporates zones with different radiologic densities that appear as distinct contrast patterns in radiologic images. The first zone with high radiologic density provides a clear visual marker that enables determination of mounting status, while the varying density zones create distinguishable patterns that indicate proper installation.
Solution Approach 2:
The solution adds radiologic density as an additional dimension of differentiation, creating zones with varying X-ray attenuation properties. This dimensional addition allows the post to be distinguished from the implant and enables assessment of mounting status through radiologic imaging without requiring the entire post to be transparent.
3Ease of manufacture
If conventional plaster mould techniques are used for dental prosthesis design, then the process is simpler and more traditional, but cumulative errors occur that reduce accuracy
Solution Approach 1:
The invention creates a radiologic copy or representation of the actual post-implant configuration in the computer model. By defining the post positions and orientations based on radiologic test data, the system generates an accurate digital replica that eliminates the need for physical plaster moulds while maintaining manufacturing simplicity through CAD/CAM processes.
Solution Approach 2:
The invention replaces the mechanical plaster mould system with a radiologic-based digital modeling system. Instead of using physical impressions and moulds, the solution uses X-ray imaging and computer-aided design to create the prosthesis model, thereby eliminating cumulative errors associated with manual moulding while maintaining ease of manufacture through automated CAD/CAM workflows.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise determination of post placement and orientation, reducing dimensional errors and ensuring secure attachment by allowing clear differentiation in radiologic tests, thus enhancing the accuracy of dental prosthesis modeling.
Implementation Method 1
positioning X-ray detectable posts on the implants fitted in the mouth of a patient, performing a radiologic test of the patient's mouth having the posts placed on the implants
Implementation Method 2
converting the CAT scan results into a three-dimensional computer model for CAD/CAM processing
Data Source
Figure 1~2
AI summary
This post (1) comprises: a body (11) of biocompatible and radiologically visible material, a threaded shank (12) for being attached to a dental implant (2), and an open or closed cavity (13), of a predetermined geometrical shape, arranged at a pre-set position on the post (1), defined in the same material from which the post is made and containing a substance (14) of a different density from that of the material from which the post (1) is made; said substance (14) presenting suitable properties for the cavity (13) containing the same and/or the substance (14) itself in order to be visible through magnetic resonance, ionizing radiation of the CAT (computerized tomography) or CBCT (cone beam computerized tomography) type, or any other similar radiologic test.