Restor Dent Endod.  2014 Aug;39(3):180-186.

Enamel pretreatment with Er:YAG laser: effects on the microleakage of fissure sealant in fluorosed teeth

• Memarpour
• Kianimanesh N
• Shayeghi B

Abstract

OBJECTIVES
The purpose of this in vitro study was to evaluate the microleakage and penetration of fissure sealant in permanent molar teeth with fluorosis after pretreatment of the occlusal surface.
MATERIALS AND METHODS
A total of 120 third molars with mild dental fluorosis were randomly divided into 6 groups (n = 20). The tooth surfaces were sealed with an unfilled resin fissure sealant (FS) material. The experimental groups included: 1) phosphoric acid etching (AE) + FS (control); 2) AE + One-Step Plus (OS, Bisco) + FS; 3) bur + AE + FS; 4) bur + AE + OS + FS; 5) Er:YAG laser + AE + FS; and 6) Er:YAG laser + AE + OS + FS. After thermocycling, the teeth were immersed in 0.5% fuchsin and sectioned. Proportions of mircoleakage (PM) and unfilled area (PUA) were measured by digital microscope.
RESULTS
Overall, there were significant differences among all groups in the PM (p = 0.00). Group 3 showed the greatest PM, and was significantly different from groups 2 to 6 (p < 0.05). Group 6 showed the lowest PM. Pretreatment with Er:YAG with or without adhesive led to less PM than bur pretreatment. There were no significant differences among groups in PUA.
CONCLUSIONS
Conventional acid etching provided a similar degree of occlusal seal in teeth with fluorosis compared to those pretreated with a bur or Er:YAG laser. Pretreatment of pits and fissures with Er:YAG in teeth with fluorosis may be an alternative method before fissure sealant application.

Keyword

Adhesives; Bur; Flourosis; Laser; Pit and fissure sealant

MeSH Terms

Adhesives
Dental Enamel*
Fluorosis, Dental
Molar
Molar, Third
Rosaniline Dyes
Tooth*
Adhesives
Rosaniline Dyes

Figure

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  Figure 1 Method used to calculate the proportion of microleakage: (c + d) / (e + f). c and d represent microleakage in mm, and e and f represent the total length of fissure sealant in mm.21,28

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  Figure 2 Method used to calculate the proportion of the unfilled area: a / (a + b). b represents the fissure sealant area and a represents the unfilled area.21,28

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