Evaluation of Post-Operative Sensitivity of Bulk Fill Resin Composite versus Nano Resin Composite: A Randomized Controlled Clinical Study

Abstract

BACKGROUND: Despite recent advances in restorative dentistry adhesive restorations may cause postoperative sensitivity which leads to restoration failure.
 AIM: This study aimed to compare and evaluate the incremental and bulk fill resin Composite postoperative sensitivity in class II posterior restorations bonded with two adhesive systems (self-etch and etch-and-rinse).
 METHODS: Sixty patients were randomly selected, their age range from twenty-five to forty years old, divided into two groups according to the packing technique of resin composite material; incremental Tetric Evoceram and Tetric Evoceram bulk-fill resin composite. Thirty patients (n = 30) for incremental Tetric Evoceram resin composite restorations and according to the adhesive systems used they were equally divided (n = 15 teeth).Thirty patients (n = 30) for Tetric Evoceram bulk-fill resin composite restorations and according to the adhesive systems used (etch and rinse or self-etch), they were equally divided (n = 15 teeth). Post-operative pain assessed at 24 hours, 1 week and 1 month using the Visual Analog Scale Score (VAS). Each patient was instructed to put a mark on the VAS line at home to point out the intensity of pain at each assessment period. The problem of measuring the pain that pain tolerance of individuals may be different from the others. This may be due to different reasons, and it is not always because of a problem in the restoration
 RESULTS: After 1 day, 1 week as well as 1 month, no statistically significant disagreement between the two resin composite types using self-etch adhesive strategy and total-etch adhesive strategy. Also, when the two adhesive systems were compared using Bulk Fill resin composite and incremental Nano resin composite no statistically significant disagreement between the two adhesive systems after 1 day, 1 week as well as 1 month.
 CONCLUSION: The post-operative hypersensitivity is related to many factors as the procedure of cavity preparation, adhesive approach, and type of resin composite used and placement technique of the resin composite.

Two-year clinical performance of dual- and light-cure bulk-fill resin composites in Class ӀӀ restorations: a randomized clinical trial

“…This might be attributed to the low polymerization shrinkage of the tested BFRCs, small to medium-sized cavity preparations, using universal adhesive with selective etching technique. Afifi et al [ 50 ] conducted a randomized clinical study with similar findings.…”

“…The post-operative sensitivity is related to many factors as the procedure of cavity preparation, adhesive approach, leakage, occlusal discrepancies, cuspal deformation by shrinkage stress, type of resin composite, and placement technique of the resin composite [ 50 , 51 ]. Regarding post-operative sensitivity in the current study, all the tested BFRCs were clinically accepted.…”

Analysis of Cosmetic Effect of Nanocomposite Resin on Anterior Teeth

“…The reason may be that Z350 nanocomposite resin has strong compression resistance, polishing property, and edge suitability. Nanosized particles have very small diameter and can enter the polymer chain gap, so the probability of dental pulp stimulation is very low, which effectively reduces the occurrence of tooth sensitivity after restoration [ 22 ]. The sample size of this study is limited, and further confirmation is needed with a larger sample size.…”

Clinical Evaluation of Postoperative Sensitivity in Class I Resin Composite Restorations

“…The VAS is an instrument that measures subjective characteristics or attitudes that cannot be directly measured [51]. Thus, the presence of postoperative sensitivity may be influenced by the potential for aggression of the substances used as well as the individual differences in the subjective experience of pain [52]. Even though the analyzes of the results appear very promising, further clinical studies are needed to assess long-term postoperative sensitivity of the associations between the adhesive systems and resin composites used.…”