title: Clinical evaluation of resin composite and resin-modified glass ionomer cement in non-carious cervical lesions.
abstract: BACKGROUND
  The clinical performance of various tooth-coloured materials used to restore Non-Carious Cervical Lesions (NCCLs) has been evaluated. However, most of these evaluations were in western societies where soft diets requiring little mastication were common. The present study sets out to evaluate resin composite and RMGIC in the restoration of NCCLs among a Nigerian subpopulation group with fibrous diet requiring more rigorous mastication.
  
  
  METHODS
  The study included all adult patients that presented at the Dental Hospital, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria with non-carious cervical lesions over a period of six months. The teeth with non-carious cervical lesions in each patient were allocated into treatment with either resin composite or resin-modified glass ionomer cement by simple random sampling using ballots. The depth of the NCCLs was measured using a graduated flat ash periodontal probe. All the treatment was done by the first author according to the manufacturer's instructions. Patients were recalled and evaluated at 48- hours, 3- months, 6- months and 12- months using the USPHS criteria. Data analysis was done using SPSS version 15. The level of significance was put at 0.05.
  
  
  RESULTS
  At the end of 12 months, 143 resin composite and 144 RMGIC restorations were evaluated, out of which 37 resin composite and 13 RMGIC restorations were dislodged, giving a retention rate of 74.1% and 91.0% respectively. The difference was statistically significant (p<0.05). For marginal discolouration, marginal adaptation, abrasion wear resistance, post operative sensitivity, and secondary caries, there were no statistically significant differences in the performance of resin composite and RMGIC. There was more retention failure of both resin composite and RMGIC restorations in NCCLs in mandibular teeth than in maxillary teeth. The differences were statistically significant (p<0.05).
  
  
  CONCLUSIONS
  RMGIC demonstrated a higher retention rate in the restoration of non-carious cervical lesions than resin composite over a period of 12 month.
authors.lastname: Adeleke
authors.forename: Ao
authors.initials: A
authors.lastname: Oginni
keywords: Non-carious cervical lesions; RMGIC; Resin composite; Restoration