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Precision of In Vivo Quantitative Tooth Wear Measurement Using Intra-Oral Scans

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Quantification of tooth wear: conventional vs new method using toolmakers microscope and a three-dimensional

Mahmoud K Al-Omiri¹, Rousan Harb, Osama A Abu Hammad

¹Department of Prosthodontics, Faculty of Dentistry, The University of Jordan, Amman 11942, Jordan. alomirim@yahoo.co.uk

Journal of Dentistry

|April 13, 2010

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A new CAD-CAM laser scanner detected incisal tooth wear over six months. However, direct measurement of stone dies using a toolmaker microscope proved more accurate for quantifying tooth wear progression.

Area of Science:

Dental Materials Science
Digital Dentistry
Restorative Dentistry

Background:

Incisal tooth wear is a growing concern in dentistry.
Accurate quantification of tooth wear is crucial for diagnosis and treatment planning.
Conventional methods for assessing tooth wear have limitations in sensitivity and accuracy.

Purpose of the Study:

To evaluate the reliability of a new CAD-CAM laser scanning system for detecting incisal tooth wear over a six-month period.
To compare the accuracy of this new system against a toolmaker microscope and a conventional tooth wear index.

Main Methods:

Twenty participants with incisal tooth wear were assessed at baseline and after six months.
Stone dies of lower anterior teeth were created and scanned using the CAD-CAM Laser Cercon System.

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Tooth wear was quantified by examining scanned images under a toolmaker microscope and by directly assessing the stone dies under the microscope.

Main Results:

The CAD-CAM laser scanner detected wear progression over the six-month period.
Direct measurement of stone dies under a toolmaker microscope yielded significantly higher wear values compared to the CAD-CAM system's digital images.
Both methods showed significant differences between the two assessment occasions.

Conclusions:

The CAD-CAM digital machine images, when analyzed with a toolmaker microscope, can detect wear progression.
Direct microscopic assessment of stone dies offers more accurate quantification of tooth wear progression.
The conventional tooth wear index was the least sensitive method for detecting wear progression.