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Quantification of tooth wear : conventional vs new method using toolmakers microscope and a three-dimensional measuring technique
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Al-Omiri, Mahmoud K., Harb, Rousan, Abu Hammad, Osama A., Lamey, Philip-John, Lynch, Edward, Dr. and Clifford, Thomas J. (2010) Quantification of tooth wear : conventional vs new method using toolmakers microscope and a three-dimensional measuring technique. Journal of Dentistry, 38 (7). pp. 560-568. doi:10.1016/j.jdent.2010.03.016 ISSN 0300-5712.
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Official URL: http://dx.doi.org/10.1016/j.jdent.2010.03.016
Abstract
Objectives:
This study aimed to evaluate the reliability of a new CAD-CAM Laser scanning machine in detection of incisal tooth wear through a 6-month period and to compare the accuracy of using this new machine against measuring tooth wear using tool maker microscope and conventional tooth wear index.
Methods:
Twenty participants (11 males and 9 females, mean age=22.7 years, SD=2.0) were assessed for incisal tooth wear of lower anterior teeth using Smith and Knight clinical tooth wear index (TWI) on two occasions, the study baseline and 6 months later. Stone dies for each tooth were prepared and scanned using the CAD-CAM Laser Cercon System (Cercon Smart Ceramics, DeguDent, Germany). Scanned images were printed and examined under a toolmaker microscope (Stedall-Dowding Machine Tool Company, Optique et Mecanique de Precision, Marcel Aubert SA, Switzerland) to quantify tooth wear and then the dies were directly assessed under the microscope to measure tooth wear. The Wilcoxon Signed Ranks Test was used to analyse the data.
Results:
TWI scores for incisal edges were 0, 1, and 2 and were similar at both occasions. Scores 3 and 4 were not detected. Wear values measured by directly assessing the dies under the tool maker microscope (range=517-656microm, mean=582microm, and SD=50) were significantly more than those measured from the Cercon digital machine images (range=132-193microm, mean =165microm, and SD=27) and both showed significant differences between the two occasions.
Conclusions:
Measuring images obtained with Cercon digital machine under tool maker microscope allowed detection of wear progression over the 6-month period. However, measuring the dies of worn dentition directly under the tool maker microscope enabled detection of wear progression more accurately. Conventional method was the least sensitive for tooth wear quantification and was unable to identify wear progression in most cases.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > ( - July 2016) Medical Education Hub Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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| Journal or Publication Title: | Journal of Dentistry | ||||
| Publisher: | Elsevier Ltd | ||||
| ISSN: | 0300-5712 | ||||
| Official Date: | July 2010 | ||||
| Dates: |
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| Volume: | 38 | ||||
| Number: | 7 | ||||
| Page Range: | pp. 560-568 | ||||
| DOI: | 10.1016/j.jdent.2010.03.016 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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