Effect of Laser Tooth Surface Pretreatment on Some Mechanical Properties of Pit And Fissure Sealant (An In Vitro Study)

Document Type : Original Article

Authors

1 pedodontic department .faculty of dentist al azhar university

2 Assistant professor of Pedodontics and Oral Health Faculty of Dental Medicine, Boys, Cairo Al-Azhar University

3 Dental biomaterial department faculty of dental medicine Al Azhar university

4 egypt - cairo - nasr city -69 othman building

Abstract

Objectives: This in vitro study was directed to evaluate the effect of laser surface pretreatment alone or in combination with acid etching on resin penetration, microleakage, and micro-tensile bond strength of resin-based pit-and-fissure sealant. subjects and methods: A total of 60 permanent mandibular molars were divided into four equal main groups (n= 15) according to the enamel surface pretreatment protocol. Group I; occlusal pit-and-fissure pretreated with acid etch alone (control group), Group II; occlusal pit-and-fissure pretreated with laser alone, Group III: occlusal pit-and-fissure pretreated with acid etch followed by laser; and Group VI: occlusal pit-and-fissure pretreated with laser followed by acid etch. Assessment includes, resin penetration, microleakage, and micro-tensile bond strength of resin-based pit-and-fissure sealant. Results: The results of the present study revealed that the use of acid etching pretreatment alone of the occlusal pit and fissures resulted in significantly better resin penetration, microleakage resistance and better micro-tensile bond strength when compared to laser pretreatment alone. Also, the results of the present study showed that the samples which pretreated with laser in combination with acid etching resulted in insignificant better resin penetration, microleakage resistance and better micro-tensile bond strength when compared to acid etch pretreatment alone. Conclusion: laser etching alone is not an alternative therapy to conventional acid etching. But the laser and acid etching combination can be a good choice and is comparable to bur invasion.

Keywords

Al-Azhar Journal of Dental Science
Volume 27, Issue 1 - Serial Number 1
January - Pediatric Dentistry & Orthodontics Issue (Pediatric Dentistry, Orthodontics)
January 2024
Pages 153-160

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