Statement of problem: Although all the processes of loss of hard tissue are important, attrition on the occlusal surfaces commands our attention.
Purpose of study: The enamel wear rate of 18 young adults over 2 consecutive years was measured independently by volume loss and mean depth loss. Any significant differences in tooth wear resulting from gender and a clinical diagnosis of bruxism were identified.
Material and methods: A strict protocol for dental impressions provided epoxy models, which were digitized with a null point contact stylus. AnSur software provided a complete morphologic description of changes in the wear facets.
Results: The mean loss for all teeth measured was 0.04 mm3 by volume and 10.7 microns by depth for the first year.
Conclusions: These numbers were approximately doubled at 2 years of cumulative wear.