Dental Alignment Instrument for 3D Intraoral Data
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Solution Overview
Problem
Current methods for creating three-dimensional intraoral image data face challenges in precision and accuracy, particularly when aligning multiple pieces of data within a large oral cavity measurement range, leading to errors in detecting similar shapes and aligning data correctly.
Innovation Solution
An auxiliary instrument with a sheet portion and identification portions is used to improve data alignment, featuring protrusions, recesses, and holes for easy identification, allowing for precise alignment and connection of three-dimensional image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple pieces of three-dimensional image data are connected to create three-dimensional intraoral image data, then the measurement range is extended, but the alignment precision deteriorates due to errors in detecting similar shapes
Solution Approach 1:
The patent introduces an auxiliary instrument as an intermediary object that is disposed in the oral cavity during three-dimensional measurement. This instrument contains identification portions with unique three-dimensional shapes that serve as mediators for aligning multiple image data pieces. The identification portions are detected by the three-dimensional measurement device, and their known shapes enable precise alignment between overlapping measurement regions, thereby maintaining alignment precision while extending the measurement range.
Solution Approach 2:
The patent employs identification portions with distinct three-dimensional shapes that can be visually or computationally distinguished. These identification portions may have different shapes, sizes, or surface characteristics that make them easily identifiable by the measurement device. The use of distinctive features analogous to color changes enables the system to differentiate and accurately detect corresponding points across multiple image data pieces, improving alignment precision.
2Area of stationary object
If multiple pieces of three-dimensional image data are connected to create three-dimensional intraoral image data, then the measurement range is extended, but the accuracy deteriorates due to errors in aligning data correctly
Solution Approach 1:
The auxiliary instrument serves as a mediator that bridges multiple measurement sessions. The identification portions on the instrument remain stationary relative to the oral cavity structures, providing consistent reference points across multiple measurements. By detecting these known identification portions in each measurement session, the system can accurately transform and align coordinate systems, thereby maintaining data alignment accuracy while expanding the overall measurement range.
Solution Approach 2:
The auxiliary instrument is disposed in the oral cavity before the three-dimensional measurement begins. The identification portions are pre-positioned at known locations, allowing the measurement device to establish reference points in advance. This preliminary placement enables the system to perform accurate alignment calculations when connecting multiple image data pieces, as the reference positions are already established and can be detected in each measurement session.
3Ease of operation
If similar shapes are detected for alignment reference, then data connection is enabled, but errors occur in detecting similar shapes leading to alignment mistakes
Solution Approach 1:
Instead of relying on detecting similar shapes of oral structures which may lead to errors, the patent introduces identification portions as intermediaries with uniquely defined three-dimensional shapes. These identification portions are artificially created with known geometries, eliminating the ambiguity of detecting natural structures. The measurement device detects these controlled identification portions, and their precise known shapes enable accurate alignment without the errors associated with detecting similar natural shapes.
Solution Approach 2:
The patent changes the parameter of the alignment reference from natural oral structures with variable shapes to artificial identification portions with controlled, unique three-dimensional shapes. By modifying the shape parameters to be distinctly different and precisely defined, the system improves shape detection accuracy. The identification portions are designed with specific geometric characteristics that make them easily and accurately detectable, reducing errors in shape detection and subsequent alignment.
Data Source
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AI summary
An auxiliary instrument according to the present invention is an auxiliary instrument for dental use used as a reference of alignment for creating three-dimensional intraoral image data by connecting a plurality of pieces of three-dimensional image data obtained by three-dimensionally measuring an inside of an oral cavity, the auxiliary instrument including a sheet portion having a first surface and a second surface opposed to the first surface, and a plurality of identification portions formed in a thickness direction (Z direction) of the sheet portion from the first surface of the sheet portion, each of the plurality of identification portions having a three-dimensional shape configured to be identified.