Factors affecting wear of composite resin denture teeth—24-month results from a clinical study

Abstract

The objectives of this study were to measure the occlusal wear of composite resin denture teeth in patients wearing a complete denture and to evaluate factors affecting wear. Fifty participants provided with complete dentures in at least one jaw were included. Gypsum casts were made from preliminary vinyl polysiloxane impressions 4 weeks after insertion, then after 6 (t(1)), 12 (t(2)), and 24 months (t(3)). Three-hundred and three posterior denture teeth were evaluated after 24 months. Wear was measured indirectly, from the casts, by means of a three-dimensional laser scanner device. Sequential images of the occlusal surfaces were digitized and superimposed (occlusal matching). Statistical analysis was performed by the use of mixed regression models, with the patient being a random effect. Mean wear (median, interquartile range; micrometer) of the entire occlusal surface was 8 (19) at t(1), 18 (34) at t(2), and 40 (61) at t(3). Maximum vertical loss (median, interquartile range; micrometer) was 92 (112) at t(1), 146 (148) at t(2), and 226 (184) at t(3). The dental status of the opposing jaw and the nature of the opposing material significantly affected the wear of denture teeth at t (3). Gender, daily wearing time, jaw, and type of tooth had no significant effects on the extent of wear. Clinically relevant vertical loss of composite resin denture teeth occurs after 24 months. Considering the limitations of this study, wear of denture teeth was affected by dental status and opposing material. The results suggest that wear of composite resin denture teeth exceeds that of enamel.

Patient- and therapy-related factors on the wear of denture teeth – Results of a clinical trial

“…There was, however, a trend of less wear in female subjects compared to male ones and in older subjects compared to younger ones. The same trend for females showing less wear than males had been observed in a study using the same laser equipment for wear measurement [6]. Due to the high variability in the wear results of that study combined with the fact that only 32 subjects completed the 2-year recall, the difference was not statistically significant.…”

“…between gender and wear of denture teeth [4][5][6] while one study did find a significant influence after 6 months [7]. Generally, women have smaller masticatory muscles than men, resulting in lower masticatory forces [8].…”

The association between denture self-satisfaction rates and OHRQoL - a follow-up study

“…The correlation between expectation and satisfaction after complete denture treatment has been assessed in some previous studies [28][29][30]. However, this satisfaction of treatment is multi-dimensional concept.…”

Preliminary clinical evaluation of traditional and a new digital PEEK occlusal splints for the management of sleep bruxism

“…34 Moreover, Martina et al measured the wear loss for dentures using surface analysis software (Match 3D, Version 1.6, Willytec/SD Mechantronic). 35,36 For occlusal splints, Kentaro proposed an evaluation system which can analyse the location and direction of wear facets and surface loss. This system could observe not only the surface loss but also the warp deformation of the splint by scanning the splint made of a specific elastic material on the cast.…”

“…Furthermore, DeLong et al investigated several methods to measure wear, concluding that it is best to use 3D scanning to compare sequential images of a surface 34 . Moreover, Martina et al measured the wear loss for dentures using surface analysis software (Match 3D, Version 1.6, Willytec/SD Mechantronic) 35,36 . For occlusal splints, Kentaro proposed an evaluation system which can analyse the location and direction of wear facets and surface loss.…”