Abstract
The wear of artificial resin teeth used in prosthetic rehabilitation treatment is of great concern to the dentist, since wear changes the occlusal vertical dimension (OVD) and may provoke cranio-mandibular disturbance, decrease masticatory efficiency, increase the discomfort for the patient and alter esthetics. Thus, one of the most important physical properties of artificial teeth is their abrasion resistance and the ability to maintain the occlusal relation of the patient stable. To evaluate the rates of wear of eight commercially available brands of artificial resin teeth, forty-eight samples were prepared from 8 different brands, totaling 8 groups each with six elements. The samples were evaluated by a gravimetric method, and analyzed by measuring the difference between the initial and final weights following the experiment. Obtained values were submitted to variance analysis and Tukey’s test (p<0.05). Statistic analysis revealed a difference between Artplus, Biolux, Duratone, Trilux, Trubyte Biotone and Vipi Dent Plus brands and the SR Orthosit teeth. Teeth of Myerson brand did not show any significant difference for any of the brands tested, presenting results with intermediate values (p<0.05). Artplus, Biolux, Duratone, Trilux, Trubyte Biotone and Vipi Dent Plus teeth brands presented higher wear values, while the SR Orthosit teeth brand demonstrated lower wear values and was, therefore, the best brand of tooth among those evaluated.
Highlights
Factors affecting the success of prosthetic rehabilitation treatments include the choice and correct recommendation of adequate materials for the performance of clinical-laboratory procedures
Khan et al.[6] (1985) evaluated the abrasion of anatomic acrylic resin denture teeth produced by three different manufacturers and concluded that the selection of the teeth for dentures should be based on personal preference and esthetic considerations rather than on assumed differences in wear rates, once no statistically significant different was found between the tested samples
We agree with the conclusion of this paper parcially, in relation to six of the eight brands evaluated in our study, that did not presented statistically significant difference among them
Summary
Factors affecting the success of prosthetic rehabilitation treatments include the choice and correct recommendation of adequate materials for the performance of clinical-laboratory procedures. Whilst a number of different orthodontic materials have been used for the fabrication of prosthetic devices, special attention has been paid to the resin used, the major component of dentures and its effects on function (teeth) and esthetics (base). Another worry is that posterior teeth demonstrate functional wear at a faster rate than anterior teeth, causing occlusal prematurities and a loss of vertical dimension of occlusion. More stress is placed on the anterior ridges, which may cause a loss of alveolar ridge height in the anterior segments (WHITMAN et al.12, 1987)
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