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Enhanced retention of glass-ionomer sealant by enamel etching: a microleakage and scanning electron microscopic study.
Quintessence Int. 1999 Oct; 30(10):712-8.QI

Abstract

OBJECTIVE

A microleakage study and a scanning electron microscopic investigation were conducted to test whether etching of enamel would improve adhesion of glass-ionomer cement sealants to fissure enamel.

METHOD AND MATERIALS

Forty-eight extracted human molars and premolars were divided into 2 equal groups, and their crowns were cleaned with pumice. In group 1 enamel was etched for 45 seconds with 37% phosphoric acid. In group 2, enamel was not etched. Glass-ionomer sealant was applied to all 48 teeth. Twenty teeth from each group were thermocycled in water (120 cycles between 0 degree C and 56 degrees C) and stained with 0.5% methylene blue solution. The remaining 4 teeth from each group served as a control for the scanning electron microscopic evaluation. Twelve teeth from each group were cut into 5 sections, and 12 were cleaved into 3 sections in a buccolingual direction.

RESULTS

Statistically significant differences in amounts of microleakage were found between group 1 and group 2. Minimal microleakage was detected in 90% of the etched teeth, whereas extensive microleakage was observed in 85% of nonetched teeth. The scanning electron microscopic evaluation correlated positively with the microleakage observations. The etched teeth revealed a cohesive failure within the sealant material, while the nonetched teeth demonstrated an adhesive failure at the sealant-enamel interface. Observation of the nonthermocycled teeth confirmed those findings.

CONCLUSION

Results suggested that etching prior to application enhances the bonding of glass-ionomer sealant to fissure enamel.

Authors+Show Affiliations

Department of Pediatric Dentistry, New York University, College of Dentistry, New York 10010, USA. birkenfld@is2.nyu.eduNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

10765856

Citation

Birkenfeld, L H., and A Schulman. "Enhanced Retention of Glass-ionomer Sealant By Enamel Etching: a Microleakage and Scanning Electron Microscopic Study." Quintessence International (Berlin, Germany : 1985), vol. 30, no. 10, 1999, pp. 712-8.
Birkenfeld LH, Schulman A. Enhanced retention of glass-ionomer sealant by enamel etching: a microleakage and scanning electron microscopic study. Quintessence Int. 1999;30(10):712-8.
Birkenfeld, L. H., & Schulman, A. (1999). Enhanced retention of glass-ionomer sealant by enamel etching: a microleakage and scanning electron microscopic study. Quintessence International (Berlin, Germany : 1985), 30(10), 712-8.
Birkenfeld LH, Schulman A. Enhanced Retention of Glass-ionomer Sealant By Enamel Etching: a Microleakage and Scanning Electron Microscopic Study. Quintessence Int. 1999;30(10):712-8. PubMed PMID: 10765856.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced retention of glass-ionomer sealant by enamel etching: a microleakage and scanning electron microscopic study. AU - Birkenfeld,L H, AU - Schulman,A, PY - 2000/4/15/pubmed PY - 2000/4/25/medline PY - 2000/4/15/entrez SP - 712 EP - 8 JF - Quintessence international (Berlin, Germany : 1985) JO - Quintessence Int VL - 30 IS - 10 N2 - OBJECTIVE: A microleakage study and a scanning electron microscopic investigation were conducted to test whether etching of enamel would improve adhesion of glass-ionomer cement sealants to fissure enamel. METHOD AND MATERIALS: Forty-eight extracted human molars and premolars were divided into 2 equal groups, and their crowns were cleaned with pumice. In group 1 enamel was etched for 45 seconds with 37% phosphoric acid. In group 2, enamel was not etched. Glass-ionomer sealant was applied to all 48 teeth. Twenty teeth from each group were thermocycled in water (120 cycles between 0 degree C and 56 degrees C) and stained with 0.5% methylene blue solution. The remaining 4 teeth from each group served as a control for the scanning electron microscopic evaluation. Twelve teeth from each group were cut into 5 sections, and 12 were cleaved into 3 sections in a buccolingual direction. RESULTS: Statistically significant differences in amounts of microleakage were found between group 1 and group 2. Minimal microleakage was detected in 90% of the etched teeth, whereas extensive microleakage was observed in 85% of nonetched teeth. The scanning electron microscopic evaluation correlated positively with the microleakage observations. The etched teeth revealed a cohesive failure within the sealant material, while the nonetched teeth demonstrated an adhesive failure at the sealant-enamel interface. Observation of the nonthermocycled teeth confirmed those findings. CONCLUSION: Results suggested that etching prior to application enhances the bonding of glass-ionomer sealant to fissure enamel. SN - 0033-6572 UR - https://www.unboundmedicine.com/medline/citation/10765856/Enhanced_retention_of_glass_ionomer_sealant_by_enamel_etching:_a_microleakage_and_scanning_electron_microscopic_study_ DB - PRIME DP - Unbound Medicine ER -