A cross-sectional study correlating overhangs, secondary caries and restoration types
Aim: To assess the correlation between overhanging dental restorations (ODRs), secondary caries lesions (SCLs) and restoration type. Methods: A cross-sectional study was conducted at the National Guard Hospital in Madinah, Saudi Arabia. Screening was performed for radiographic records of 1388 dental attendees between May 2014 and August 2016. Individuals with one or more proximal restorations were included. Descriptive statistics and Spearman’s correlation between ODRs, SCLs and different restoration types were performed. p≤0.05 was considered statistically significant. SPSS® statistical software version 20.0 was used. Results: In total, 502 patients (mean age 38±13 years with equal gender distribution) were included. Out of 1112 proximal restorations, 19 were temporary fillings, 21 glass ionomer cements, 489 amalgams, 566 composites, 18 Crowns and 8 were bridge pontics. Overall, 322 had ODRs (prevalence =36%), while 336 had SCLs (prevalence =38%). ODRs were highly correlated with amalgam restorations (correlation coefficient =0.6, p<0.001), while SCLs were highly correlated with composite restorations (correlation coefficient =0.6, p<0.001). No such correlations were observed between ODRs, SCLs and any of the remaining restoration types or materials.
Conclusion: Within the study limits, ODRs were correlated with amalgam restorations, while SCLs were correlated with composite restorations.