Comparative evaluation of shear bond strength of two pit and fissure sealants: an in vitro study

Background and objectives. Pit and fissure caries account for a significant proportion of dental caries, particularly in children. Traditional resin-based sealants, while effective, pose application challenges. The clinical success of a sealant depends on its adhesion, wear resistance, and ability to withstand occlusal forces. This study evaluates the shear bond strength of a Giomer-based resin sealant, Beautisealant (Shofu, Japan), compared to a conventional resin sealant (Clinpro, 3M ESPE) in permanent teeth. Materials and methods. This in vitro study involved 10 premolars and 10 third molars extracted for orthodontic and impaction reasons. The specimens were assigned to four groups (n = 5). Groups I and III received Clinpro with etching, bonding, and curing, while Groups II and IV received Beautisealant with a self-etch primer and light curing. Shear bond strength was measured using a universal testing machine. Results. Statistical analysis showed significantly higher shear bond strength for Clinpro compared to Beautisealant (p < 0.05). Mean shear bond strength was 62.10 ± 2.37 MPa (premolars) and 72.63 ± 3.89 MPa (molars) for Clinpro, while Beautisealant exhibited 54.45 ± 3.44 MPa (premolars) and 66.53 ± 4.04 MPa (molars). Bond strength was consistently higher in molars. Conclusion. Clinpro demonstrated superior shear bond strength. However, Beautisealant, with its self-etching primer and bioactive fillers, may be a viable alternative in cases where moisture control is difficult. Further clinical studies are recommended to validate these findings.