Abrasion wear resistance of different artificial teeth opposed to metal and composite antagonists

Abstract

One of the most important properties of artificial teeth is the abrasion wear resistance, which is determinant in the maintenance of the rehabilitation's occlusal pattern.Objectives:This in vitro study aims to evaluate the abrasion wear resistance of 7 brands of artificial teeth opposed to two types of antagonists.Material and methods:Seven groups were prepared with 12 specimens each (BIOLUX – BL, TRILUX – TR, BLUE DENT – BD, BIOCLER – BC, POSTARIS – PO, ORTHOSIT – OR, GNATHOSTAR – GN), opposed to metallic (M – nickel-chromium alloy), and to composite antagonists (C – Solidex indirect composite). A mechanical loading device was used (240 cycles/min, 4 Hz speed, 10 mm antagonist course). Initial and final contours of each specimen were registered with aid of a profile projector (20x magnification). The linear difference between the two profiles was measured and the registered values were subjected to ANOVA and Tukey's test.Results:Regarding the antagonists, only OR (M = 10.45 ± 1.42 μm and C = 2.77 ± 0.69 μm) and BC (M = 6.70 ± 1.37 μm and C = 4.48 ± 0.80 μm) presented statistically significant differences (p < 0.05). Best results were obtained with PO (C = 2.33 ± 0.91 μm and M = 1.78 ± 0.42 μm), followed by BL (C = 3.70 ± 1.32 μm and M = 3.70 ± 0.61 μm), statistically similar for both antagonists (p>0.05). Greater result variance was obtained with OR, which presented the worse results opposed to Ni-Cr (10.45 ± 1.42 μm), and results similar to the best ones against composite (2.77 ± 0.69 μm).Conclusions:Within the limitations of this study, it may be concluded that the antagonist material is a factor of major importance to be considered in the choice of the artificial teeth to be used in the prosthesis.

Prospective 10‐Year Cohort Study Based on a Randomized, Controlled Trial (RCT) on Implant‐Supported Full‐Arch Maxillary Prostheses. Part II: Prosthetic Outcomes and Maintenance

“…40 The antagonist material is a major consideration in the choice of the artificial teeth to be used in the prosthesis. 41 The results from the current clinical study indicate that the status of the opposing dentition does not confer additional risk of fracture or wear of the reconstruction. The results from an extensive literature review of commonly used restorative materials and their effects on the opposing dentition showed that the extent and rate of wear are influenced by many intraoral factors, including the restorative material.…”

“…A definite connection between wear resistance and the chemical composition of the dental teeth materials could not be found 40 . The antagonist material is a major consideration in the choice of the artificial teeth to be used in the prosthesis 41 . The results from the current clinical study indicate that the status of the opposing dentition does not confer additional risk of fracture or wear of the reconstruction.…”

Effects of Simulated Gastric Juice on CAD/CAM Resin Composites—Morphological and Mechanical Evaluations

“…Dental rehabilitation for this group of individuals may include direct or indirect restorations, depending on the severity of the case . The performance of indirect dental restorations used in prosthetic rehabilitation treatment is of great clinical interest, because degradation of the restorative material may produce some drawbacks, especially those related to changes in the occlusal vertical dimension, leading to several consequences, such as craniofacial disorders, reduced chewing efficiency, fatigue of the masticatory muscles, discomfort, and even impairment of the esthetics . For instance, laboratory‐processed resin nanoceramics are one of the materials considered for the rehabilitation of these patients; these nanoceramics are a new generation of indirect resin composites that contain a high density of inorganic ceramic fillers and poly‐functional methacrylate monomers .…”

In vitro comparison of implant- versus gingiva-supported removable dentures in anterior and posterior applications

“…Higher stability and performance can be achieved by adding organic filler components that may be simply cross-linked or even highly cross-linked. Major improvements in wear performance [8][9][10][11] or hardness, for example, can be achieved by applying inorganic filler components as done in restorative or veneering composites, and already partially in resin teeth. The modification of the chemical formulation is a tightrope walk, because increased strength and hardness may go hand in hand with increased toughness.…”