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Related Concept Videos

Adjusting a Traverse01:12

Adjusting a Traverse

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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
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Related Experiment Video

Updated: Oct 5, 2025

Accuracy in Dental Medicine, A New Way to Measure Trueness and Precision
07:57

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Accuracy of indirect bonding trays - a measurement algorithm.

Petra Julia Koch, Marco Albrecht, Wei-Cheng Lin

    International Journal of Computerized Dentistry
    |January 24, 2022
    PubMed
    Summary

    A new algorithm accurately measures indirect bonding (IDB) tray accuracy in digital orthodontics. The INDIVIDUA IDB tray shows high linear accuracy, offering a digital alternative for efficient bracket transfer.

    Keywords:
    3D automation3D superimpositionbest-fit alignmentdigital orthodonticsdigital workflowindirect bonding trayintraoral scanmeasurement algorithmtransfer accuracy

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    Area of Science:

    • Orthodontics
    • Biomedical Engineering
    • Digital Dentistry

    Background:

    • Indirect bonding (IDB) trays are crucial for precise bracket placement in orthodontics.
    • Traditional IDB tray methods can be time-consuming and prone to inaccuracies.
    • Integrating digital workflows offers potential for improved accuracy and efficiency.

    Purpose of the Study:

    • To introduce and validate an image-processing measurement algorithm for assessing IDB tray transfer accuracy.
    • To evaluate the accuracy of a CAD/CAM-based IDB tray (INDIVIDUA) within a digital orthodontic workflow.

    Main Methods:

    • Digital models from intraoral scans of 24 patients were used for virtual bracket placement.
    • Custom INDIVIDUA IDB trays were fabricated based on these digital models.
    • A measurement algorithm was developed to compare planned and actual bracket positions, analyzing linear and angular deviations.

    Main Results:

    • The algorithm successfully analyzed the transfer accuracy of 622 bracket and tube placements.
    • Linear measurements for the INDIVIDUA IDB tray were within the American Board of Orthodontics standard 98.3% of the time.
    • Angular measurements were within the standard 86.7% of the time.

    Conclusions:

    • Automated measurement algorithms are effective for evaluating IDB tray materials and designs.
    • The INDIVIDUA IDB tray represents a viable digital alternative to conventional indirect bonding trays.
    • This digital approach enhances efficiency in orthodontic practices.