Comparison of marginal microleakage of flowable composite restorations in primary molars prepared by high-speed carbide bur, Er:YAG laser, and air abrasion.
OBJECTIVE
The purpose of this study was to assess in vitro the influence of 3 cavity preparation devices (carbide bur, Er:YAG laser, and air abrasion) on the microleakage of flowable composite restorations in primary teeth.


METHODS
Fifteen primary second molars were selected, and Class V cavities were prepared on the buccal/lingual surfaces, being assigned to 3 groups (n= 10). Group 1 (control) was prepared using a high-speed handpiece and was acid etched. Group 2 was prepared and treated with a Er:YAG laser (400mJ/4Hz and 80mJ/4Hz, respectively) and was acid etched. Group 3 was prepared and treated with an air abrasion system and was acid etched. Cavities were restored and stored for 7 days. Restorations were polished, thermocycled, immersed in 0.2% rhodamine B, sectioned, and analyzed for leakage.


RESULTS
Er:YAG laser-prepared cavities showed the highest degree of infiltration. The performance of the air abrasion device was comparable to that of the high-speed handpiece.


CONCLUSIONS
It may be concluded that the method of cavity preparation affected the microleakage of Class V cavities restored with flowable composite in primary teeth.
Borsatto
Maria Cristina
MC
Department of Pediatric Clinics, Social and Preventive Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil.
Corona
Silmara Aparecida Milori
SA
Chinelatti
Michelle Alexandra
MA
Ramos
Renata Pereira
RP
de Sá Rocha
Renata Andréa Salvitti
RA
Pecora
Jesus Djalma
JD
Palma-Dibb
Regina Guenka
RG
D000134:Acid Etching, Dental; D020906:Air Abrasion, Dental / Q000295:instrumentation*; D000538:Aluminum Silicates; D002244:Carbon; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification / Q000295:instrumentation*; D003754:Dental High-Speed Equipment; D003763:Dental Leakage / Q000145:classification*; D018772:Dental Marginal Adaptation; D003775:Dental Polishing; D003793:Dental Restoration, Permanent / Q000145:classification; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004871:Erbium; D005456:Fluorescent Dyes; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008963:Molar / Q000473:pathology*; D010756:Phosphoric Acids / Q000737:chemistry; D012235:Rhodamines; D014094:Tooth, Deciduous / Q000473:pathology*; D015019:Yttrium
D000538:Aluminum Silicates; C115611:BOND-1 adhesive; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005456:Fluorescent Dyes; D008689:Methacrylates; D010756:Phosphoric Acids; D012235:Rhodamines; C111840:flowable hybrid composite; D015019:Yttrium; D002244:Carbon; D004871:Erbium; C030242:phosphoric acid; C029773:rhodamine B