J Korean Acad Conserv Dent.  2007 Jul;32(4):327-334. 10.5395/JKACD.2007.32.4.327.

Effect of microleakage of a self-etching primer adhesive according to types of cutting instruments

Affiliations
  • 1Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea. ygcho@mail.chosun.ac.kr

Abstract

The purpose of this study was to evaluate the effect of burs on microleakage of Class V resin restorations when a self-etching primer adhesive was used. Forty Class V cavities were prepared with four different cutting burs on extracted third molars, and divided into one of four equal groups (n = 10); Group 1-plain cut carbide bur (no. 245), Group 2-cross cut carbide bur (no. 557), Group 3-fine diamond bur (TF-21F), Group 4-standard diamond bur (EX-41). The occlusal and gingival margin of cavities was located in enamel and dentin, respectively. Cavities were treated with Clearfil SE Bond and restored with Clearfil AP-X. Specimens were thermocycled, immersed in a 2% methylene blue solution for 24 hours, and bisected longitudinally. They were observed leakages at enamel and dentinal margins. Data were analyzed using Mann-Whitney and Wilcoxon signed ranked test. The results of this study were as follows; 1. At enamel margin, microleakage of group 4 was statistically higher than those of group 1, 2 and 3 (p < 0.01). 2. At dentinal margin, microleakage of group 4 was statistically higher than group 3 (p < 0.01), but group 1 and 2 were not statistically different with group 3 and 4. 3. Enamel microleakage was statistically higher than dentinal microleakage in group 1, 2 and 3 (p < 0.05), but statistical difference between the microleakage of enamel and dentinal margin was not in group 4. In conclusion, the use of coarse diamond bur showed high microleakage at both enamel and dentinal margin when Clearfil SE Bond was used in class V cavity.

Keyword

Microleakage; Self-etching primer; Cutting instruments; Smear layer

MeSH Terms

Adhesives*
Dental Enamel
Dental Instruments
Dentin
Methylene Blue
Molar, Third
Smear Layer
Adhesives
Methylene Blue

Cited by  2 articles

Effect of cutting instruments on the dentin bond strength of a self-etch adhesive
Young-Gon Lee, So-Ra Moon, Young-Gon Cho
J Korean Acad Conserv Dent. 2010;35(1):13-19.    doi: 10.5395/JKACD.2010.35.1.013.

Microshear bond strength of a self-etching primer adhesive to enamel according to the type of bur
Jin-Ho Jeong, Young-Gon Cho, Myung-Seon Lee
J Korean Acad Conserv Dent. 2011;36(6):477-482.    doi: 10.5395/JKACD.2011.36.6.477.


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