title: [Wear behavior of enamel and veneering ceramics].
abstract: OBJECTIVE
  To compare the wear between the enamel and two types of dental decoration porcelains for all-ceramic restorations (Vita-alpha, Vintage AL).
  
  
  METHODS
  Friction coefficients, wear scar width, element concentrations and wear surface evolution were considered relatively to the tribology of that in vivo situation. The wear scars of the samples were characterized by means of dynamic atomic force microscopy (DFM). The different element concentrations of the surface before/after the wear test were determined with energy dispersion spectrometry (EDS).
  
  
  RESULTS
  The friction coefficient varied from time in each kind of material. The statistical differences between materials were observed in wear scar width and properties of materials (P<0.05). DFM results showed wear surface of natural tooth full of abrasive particles and denaturation of dental texture. Wear surface of veneering ceramics consisted mainly of abrasive particles, plough and microcracking. EDS results showed that the element concentration of Fe was obviously found on the samples after wear.
  
  
  CONCLUSIONS
  The main underlying mechanisms of natural teeth wear are abrasive, and denaturation of dental texture. Abrasive wear, adhesion and fatigue of veneering ceramics characterize the wear patterns which plays different role in Vita-alpha and Vintage AL. The wear patterns of veneering ceramics can be described as mild wear.
authors: Department of Prosthodontics, Xiangya Hospital, Central South University, Changsha 410008, China.
authors: Qing-ping
authors: QP
authors: Gao
authors: Yong-lie
authors: YL
authors: Chao
authors: Xin-chun
authors: XC
authors: Jian
authors: Feng
authors: F
authors: Guo
authors: Yu-kun
authors: YK
authors: Meng
mesh_terms: D002516:Ceramics; D003743:Dental Enamel; D003776:Dental Porcelain; D019554:Dental Restoration Wear; D008422:Materials Testing; D013499:Surface Properties; D019217:Tooth Attrition
chemical_list: C472245:Vita Alpha; D003776:Dental Porcelain