Dental Imaging Retractor for Consistent Multi-Angle Tooth Comparison
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Solution Overview
Problem
Existing dental imaging methods, such as described in PCT/EP2015/074896, are time-consuming and provide unsatisfactory results when comparing updated images to assess tooth positioning and changes in tooth appearance, particularly due to the need for iterative processes and difficulties in accurately determining optimal observation conditions.
Innovation Solution
A dental imaging device with a support that includes a mirror and fixed image acquisition device, allowing for simultaneous acquisition of direct and reflected images, and incorporates colorimetric and translucency targets to ensure precise positioning and lighting control, thereby accelerating the imaging process and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If iterative processes are used to determine optimal observation conditions for comparing updated images with initial reference models, then measurement precision is improved, but loss of time increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-defining multiple standardized observation conditions (different angles, distances, and orientations) before the actual imaging process. Instead of iteratively searching for optimal conditions during treatment, the system prepares a set of predetermined configurations in advance. The updated image is then directly compared against the initial reference model using these pre-established conditions, eliminating the time-consuming iterative adjustment process while maintaining assessment precision.
2Measurement precision
If multiple updated images are acquired from different angles to assess tooth positioning, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the image acquisition into multiple discrete, standardized angular positions (e.g., 0°, 45°, 90°, 135°). Each angle represents a separate measurement configuration that can be independently acquired and processed. This segmentation allows the system to capture comprehensive dental arch information from multiple perspectives while maintaining a simple, systematic approach to device operation and data processing.
3Measurement precision
If the image acquisition device is manually positioned to capture optimal images, then ease of operation is reduced, but measurement precision is improved
Solution Approach 1:
The patent applies self-service by incorporating automated positioning mechanisms that enable the image acquisition device to automatically assume predetermined angular positions and orientations. The system includes motorized mounts or mechanical guides that allow the device to self-adjust to standardized angles (0°, 45°, 90°, 135°) without requiring manual alignment by the operator. This automation ensures consistent, reproducible image orientation while significantly reducing the skill level and training required for operation.
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
The device enables rapid and accurate acquisition of multiple dental images with consistent lighting and orientation, facilitating precise determination of tooth positioning and appearance changes, and can be used by non-specialists, such as patients, without the need for extensive training.
Implementation Method 1
a mirror (16) fixed to the support (12)
Data Source
Figure 1~3
Figure 4a~5b
Figure 6a~6c
AI summary
Image acquisition device comprising: - a support (12); - a dental retractor (14) fixed to the support and defining a retractor opening (24); and - means for fixing an image acquisition device to the support in a position in which the acquisition device is oriented to receive an image of the retractor opening.