Comparing The Post-Operative Sensitivity of Bulk-Fill Versus Incremental-Fill Placement Techniques Using Nano-Hybrid Composite Resins in Class II Restorations: A Randomized Clinical Trial

Abstract

Objectives: The aim of this study was to compare the post-operative sensitivity of bulk-fill versus incremental-fill placement techniques using nano-hybrid composite resin in class II restorations.

Methodology: A randomized controlled trial was done at the Department of Operative dentistry and Endodontics, Rehman College of Dentistry, Peshawar from February 2022 to August 2022. A total of 326 participants with both genders of age 20-50 years, diagnosed with carious first mandibular molars were selected from the outpatient department using purposive sampling. The patients were divided into two groups (Group A for bulk-fill technique and Group B for incremental-fill) by random allocation using single blinded technique. After restoring the tooth, patients were recalled after one week. On the recall visit, patients were asked about possible presence or absence of sensitivity in the restored tooth. Intensity of sensitivity was measured by using Visual Analogue Scale.

Result: Chi square was used to compare the post-operative sensitivity of placement techniques among bulk-fill and incremental-fill technique. Overall post-operative sensitivity was found 29 (8.86%). The frequency of post-operative sensitivity was higher in incremental-fill technique (11.66%) than bulk-fill (6.13%), but with no statistically significant difference (p=0.228). However, the intensity of post-operative sensitivity between the two groups was statistically significant (p=0.009). Severe sensitivity was observed more in incremental group (6.13%) than bulk group (0.61%).

Conclusion: There is no significant difference in post-operative sensitivity between bulk-fill versus incremental-fill placement techniques using nano-hybrid composite resin in class II restorations.

Keywords:  Post-operative sensitivity, nano-hybrid composite, bulk-fill, incremental-fill