PubMed · 16415833
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B Littler. 2006-01-14. Address the real cause.. https://doi.org/10.1038/sj.bdj.4813127
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While once considered a major concern for posterior restorations, wear of dental composites has been substantially reduced by changes in formulation and is considered today by many to be a solved problem. However, minimal evidence exists in the literature to support this conclusion for large restorations, especially those involving the replacement of functional cusps, despite the fact that these restorations are routinely performed. Evidence shows that wear may be of minimal importance for restorations of small to moderate size. However, the literature does suggest that failure rates are higher for larger restorations, and that wear may still be a significant mode of failure for patients with bruxing and clenching habits. In this light, the wear of composites continues to be studied by many researchers, and it is justifiable to seek well-defined and reproducible in vitro methods for predicting this multifactorial phenomenon.
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OBJECTIVE: The study presents changes in reported orofacial symptoms over the course of a 10-year period. It was hypothesized that there was an increase of temporomandibular disorder (TMD) and orofacial pain symptoms during the period concurrent with social and demographic changes. MATERIAL AND METHODS: All 50-year-old subjects living in two Swedish counties were asked to answer a mail questionnaire in 1992 and 2002. In the two cohorts, 6,343 and 5,798, respectively, responded (response rate 71.3% and 70.2%). RESULTS: Striking differences in demographic, occupational, general, and oral health conditions were found. General health was reported to be less good, utilization of dental care decreased, whereas number of teeth increased. The prevalence of a number of intra-oral symptoms and orofacial symptoms increased significantly between 1992 and 2002. Reported bruxism increased from 18% in 1992 to 28% in 2002. CONCLUSION: The observed increase in reported orofacial pain symptoms during the 10-year period, concurrent with changes in society, deserves further attention by society and the dental community.