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In vitro calculus detection with a moved smart ultrasonic device
Grit Meissner1, Bernd Oehme, Jens Strackeljan
1Department of Restorative Dentistry, Periodontology and Endodontics, Unit of Periodontology, School of Dentistry, Ernst-Moritz-Arndt-University Greifswald, Germany. grit.meissner@uni-greifswald.de
Journal of Clinical Periodontology
|January 31, 2006
Summary
This study demonstrates an automated calculus detection system that accurately distinguishes between tooth surfaces, even when the device is in motion. This advancement aids in effective subgingival instrumentation for periodontal disease treatment.
Area of Science:
- Biomedical Engineering
- Periodontology
- Dental Technology
Background:
- Subgingival instrumentation aims to remove biofilm and calcified deposits from periodontally diseased root surfaces.
- An automated calculus detection system was previously developed for static conditions.
- Clinical application requires the system to function effectively while moving over tooth surfaces.
Purpose of the Study:
- To evaluate the performance of an automated calculus detection system under dynamic conditions (tip movement).
- To assess the system's ability to differentiate between tooth root surfaces during motion in vitro.
Main Methods:
- The detection device utilizes a piezoelectric ultrasonic handpiece and scaler insert.
- A fuzzy logic-based algorithm analyzes the impulse response of the mechanical oscillation system.
- The system was trained and tested on extracted teeth with the tip moved over surfaces.
Main Results:
- The system correctly classified cementum and calculus surfaces with 78% accuracy in the training set.
- Accuracy increased to 81% for surfaces unknown to the system.
- A kappa value of 0.68 indicated good agreement in classification.
Conclusions:
- The automated tooth surface recognition system can differentiate between surfaces in vitro.
- Tip movement does not impede the system's ability to distinguish between tooth surfaces.