title: [Clinical effect of a new low-shrinkage composite on restoring dental wedge-shaped defects].
abstract: OBJECTIVE
  To evaluate the clinical effect of a new low-shrinkage composite FiltekTM P90 on restoring dental wedge-shaped defects.
  
  
  METHODS
  Fifty-two patients with at least two equivalent non-carious cervical lesions on bilateral teeth (180 teeth with wedge-shaped defect) were enrolled in this study. Self-control design was used in this study. The teeth were randomly divided into experimental group which were restored with low-shrinkage composite FiltekTM P90 in one side, and the control group which were filled with FiltekTM Z350 XT composite resin in the other side. The modified USPHS/Ryge criteria were used to evaluate the treatment effects 6 months and 1 year after treatment. SPSS19.0 software package was used for statistical analysis.
  
  
  RESULTS
  The 6-months successful rate in FiltekTM P90 group was 96.55% and 95.40% in control group. The 1 year successful rate in FiltekTM P90 group was 94.05% and 90.48% in control group. There were no significant differences in main indexes, including successful rates ,retention, marginal discoloration, marginal adaptation, surface texture, color match, secondary caries and postoperative sensitivity between the 2 groups (P>0.05).
  
  
  CONCLUSIONS
  Low-shrinkage composite FiltekTM P90 is a good choice for treating dental wedge-shaped defects.
authors.affiliation: Department of General Dentistry, Capital Medical University School of Stomatology. Beijing 100050; 2.Department of General Dentistry,China. E-mail:yaozhangzheng@163.com.
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of General Dentistry, Capital Medical University School of Stomatology. Beijing 100050,China.
authors.forename: Wen-shu
authors.initials: WS
authors.lastname: Ge
authors.affiliation: Department of General Dentistry, Peking University School and Hospital of Stomatology. Beijing 100081, China.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of General Dentistry, Peking University School and Hospital of Stomatology. Beijing 100081, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Cao
mesh_terms: D003116:Color; D003188:Composite Resins; D003731:Dental Caries; D018772:Dental Marginal Adaptation; D003764:Dental Materials; D003793:Dental Restoration, Permanent; D006801:Humans
chemical_list: D003188:Composite Resins; D003764:Dental Materials