title: 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.
  
  
  OBJECTIVE
  This in vitro study aims to evaluate the abrasion wear resistance of 7 brands of artificial teeth opposed to two types of antagonists.
  
  
  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 microm and C = 2.77 +/- 0.69 microm) and BC (M = 6.70 +/- 1.37 microm and C = 4.48 +/- 0.80 microm) presented statistically significant differences (p < 0.05). Best results were obtained with PO (C = 2.33 +/- 0.91 microm and M = 1.78 +/- 0.42 microm), followed by BL (C = 3.70 +/- 1.32 microm and M = 3.70 +/- 0.61 microm), 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 microm), and results similar to the best ones against composite (2.77 +/- 0.69 microm).
  
  
  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.
authors: Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
authors: Pâmela Carbone
authors: PC
authors: Mello
authors: Abílio Ricciardi
authors: AR
authors: Coppedê
authors: Ana Paula
authors: AP
authors: Macedo
authors: Maria da Gloria Chiarello
authors: Mda G
authors: de Mattos
authors: Renata Cristina Silveira
authors: RC
authors: Rodrigues
authors: Ricardo Faria
authors: RF
authors: Ribeiro
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D019554:Dental Restoration Wear; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D014093:Tooth, Artificial
chemical_list: D000180:Acrylic Resins; D002858:Chromium Alloys; D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; D008689:Methacrylates; D011140:Polyurethanes; C113676:Solidex; C029824:urethane dimethacrylate luting resin; C513704:Isosit; C004919:ethylene dimethacrylate; D019904:Polymethyl Methacrylate