Rectangular Dental Scan Body Asymmetric Recesses Image Stitching
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Solution Overview
Problem
Conventional intraoral scanning methods face challenges in capturing side planes of dental implants, leading to poor image stitching quality and warped panorama images due to the need for inconvenient tilting maneuvers, which affects the accuracy of digital topographic impressions for custom dental prosthetics.
Innovation Solution
A dental implant scan body with a rectangular shape, featuring a tool channel, bevel edges, and asymmetric recesses, designed to improve image stitching by providing additional feature points for matching, along with a method for intraoral scanning using multiple scan bodies and adhesive resin to create a linked assembly for accurate digital and physical models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional scan bodies with flat faces are used, then image stitching can be performed, but the user must tilt the scanning probe which is inconvenient and results in poor stitching quality
Solution Approach 1:
The scan body employs an asymmetric L-shaped configuration with a first plane perpendicular to a second plane, creating distinctive geometric features that improve keypoint detection and feature matching during image stitching, eliminating the need for tilting maneuvers
Solution Approach 2:
The invention introduces a third dimensional aspect by creating perpendicular planes (first plane perpendicular to second plane) that provide additional feature points for image matching, allowing accurate stitching from a single straightforward scanning angle without requiring tilting operations
2Loss of information
If the scanning probe is tilted to capture side planes, then more features are visible, but the maneuver is inconvenient and may fail to adequately capture side planes
Solution Approach 1:
The scan body is pre-configured with perpendicular planes and asymmetric features before scanning, ensuring that all necessary geometric information is already positioned to be captured from a single standard scanning angle, eliminating the need for subsequent tilting maneuvers to capture additional features
3Manufacturing precision
If multiple tilting maneuvers are performed to capture all surfaces, then complete geometry is obtained, but time and complexity increase
Solution Approach 1:
The scan body geometry is segmented into distinct perpendicular planes (first plane and second plane) that each provide unique feature points for image stitching, allowing the complete three-dimensional geometry to be captured efficiently from multiple angles in a single scanning sequence without requiring repeated tilting maneuvers
Data Source
AI summary
A dental implant scan body comprising a rectangular block having a substantially rectangular shape. A tool channel travels through the rectangular block. A base adaptor is at the bottom of the rectangular block. The base adaptor is configured to dock with an underlying mounting platform that supports the dental prosthesis. There is a first recess on the fore section of the rectangular block and a second recess on the aft section. For example, there could be a notch on the fore section and two trenches on the aft section. The rectangular block could have bevel edges at the top surface. Also disclosed are intraoral scanning methods that use the scan bodies and dental kits that contain the scan bodies.