title: 1 year clinical evaluation of microhybrid composites used in the restoration of non-carious cervical lesions.
abstract: OBJECTIVE
  Microhybrid composite resins are commonly used to treat non-carious cervical lesions. The aim of this double blind study was to compare the 12-month clinical performance of cervical restorations placed with the use of two different microhybrid composite resins.
  
  
  METHODS
  20 patients with at least one pair of non-carious cervical lesion participated in this study. Ninety-seven cervical lesions were restored with either TPH Spectrum (n=48) or Filtek Z250 (n=49) using a two-step etch &rinse adhesive (Single Bond 2) Restorations were evaluated using modified USPHS criteria after 6 and 12 months. The statistical comparison of resin composites for each category was performed with the Pearson chi square test and the performance of restorations at the baseline, 6 months and after 12 month recall time was evaluated by Mc Nemar's test (p<0.05).
  
  
  RESULTS
  The recall rate of the patients was 100% at each evaluation period. The retention rates were 100% at six months,89,6% and 91,8% at 12-months for TPH and Z250, respectively and no statistically significant difference was observed with respect to each evaluation criteria (p>0.05).
  
  
  CONCLUSIONS
  Cervical restorations placed with two different microhybrid composites and a two-step etches and rinse system showed satisfactory clinical performance after 12-months.
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, Başkent University, 11.sokak No: 26 Bahçelievler 06490, Ankara, Turkey, Tel: +90 312 2151336; Fax: 90-312-2152962; e-mail: duygukayaoglu@yahoo.com.
authors.forename: Duygu
authors.initials: D
authors.lastname: Tuncer
authors.forename: Çiğdem
authors.initials: Ç
authors.lastname: Çelik
authors.forename: Kıvanç
authors.initials: K
authors.lastname: Yamanel
authors.forename: Neslihan
authors.initials: N
authors.lastname: Arhun