title: [Influence of multiple sintering on wear behavior of Cercon veneering ceramic].
abstract: OBJECTIVE
  To investigate the influence of multiple sintering on wear behavior of Cercon veneering ceramic.
  
  
  METHODS
  Samples were fabricated according to the manufacture's requirement for different sintering times (1, 3, 5, 7 times). The wear test was operated with a modified MM-200 friction and wear machine in vitro. The wear scars were characterized by scanning electron microscope (SEM) and atomic force microscopy (AFM).
  
  
  RESULTS
  With the sintering times increasing, the wear scar width became larger. The correlation was significant at the 0.01 level. Significant difference was observed in wear scar width among different samples (P < 0.05). SEM and AFM results showed that veneering ceramic wear facets demonstrated grooves characteristic of abrasive wear.
  
  
  CONCLUSIONS
  Multiple sintering can decrease the wear ability of Cercon veneer, and the wear pattern has the tendency to severe wear.
authors.affiliation: Dept. of Prosthodontics, Xiangya Hospital, Central South University, Changsha 410008, China.
authors.forename: Qing-ping
authors.initials: QP
authors.lastname: Gao
authors.forename: Yong-lie
authors.initials: YL
authors.lastname: Chao
authors.forename: Xin-chun
authors.initials: XC
authors.lastname: Jian
authors.forename: Feng
authors.initials: F
authors.lastname: Guo
mesh_terms: D002516:Ceramics; D003776:Dental Porcelain; D003801:Dental Veneers; D008422:Materials Testing; D013499:Surface Properties; D015040:Zirconium
chemical_list: D003776:Dental Porcelain; D015040:Zirconium