Comparison of the Efficacy of Three Different Instruments in the Removal of Amalgam Overhang: An In Vitro Study

Overhang is the extension of restorative material beyond the cavity preparation. It changes sulcus microflora into organisms conducive to chronic periodontitis. After overhang removal the gingival index and microflora return to a healthy state. This can also improve access for dental plaque removal. The aim of this study was to compare the efficacy of three different instruments in association with amalgam overhang removal. One hundred thirty-five intact premolars were selected. The teeth were restored with amalgam such that restorations had 1 mm overhangs. Overhangs were removed employing three different instruments in three groups: sickle scaler, ultrasonic scaler, and diamond flame bur. A stereomicroscope was utilized to evaluate both the level of smoothness in the restored area, tooth damage and probable gaps. The data were analyzed using post hoc and Chi-square. The minimum and maximum time of removal were respectively obtained by ultrasonic scaler and sickle scaler, which was statistically significant (