J Korean Acad Conserv Dent.  2005 Jul;30(4):344-351. 10.5395/JKACD.2005.30.4.344.

Microshear bond strength of adhesives according to the direction of enamel rods

• Cho YG
• Kim JJ

• KMID: 2175700
• DOI: http://doi.org/10.5395/JKACD.2005.30.4.344

Abstract

This study compared the microshear bond strength (microSBS) to end and side of enamel rod bonded by four adhesives including two total etch adhesives and two self-etch adhesives. Crown segments of extracted human molars were cut mesiodistally. The outer buccal or lingual surface was used as specimens cutting the ends of enamel rods, and inner slabs used as specimens cutting the sides of enamel rods. They were assigned to four groups by used adhesives: Group 1 (All-Bond 2), Group 2 (Single Bond), Group 3 (Tyrian SPE/One-Step Plus), Group 4 (Adper Prompt L-Pop). After each adhesive was applied to enamel surface, three composite cylinders were adhered to it of each specimen using Tygon tube. After storage in distilled water for 24 hours, the bonded specimens were subjected to microSBS testing with a crosshead speed of 1 mm/minute. The results of this study were as follows; 1. The microSBS of Group 2 (16.50 +/- 2.31 MPa) and Group 4 (15.83 +/- 2.33 MPa) to the end of enamel prism was significantly higher than that of Group 1 (11.93 +/- 2.25 MPa) and Group 3 (11.97 +/- 2.05 MPa) (p < 0.05). 2. The microSBS of Group 2 (13.43 +/- 2.93 MPa) to the side of enamel prism was significantly higher than that of Group 1 (8.64 +/- 1.53 MPa), Group 3 (9.69 +/- 1.80 MPa), and Group 4 (10.56 +/- 1.75 MPa) (p < 0.05). 3. The mean microSBS to the end of enamel rod was significantly higher than that to the side of enamel rod in all group (p < 0.05).

Keyword

Microshear bond strength; Enamel rod; Total etch adhesives; Self-etch adhesives; Slabs

MeSH Terms

Adhesives*
Crowns
Dental Enamel*
Humans
Molar
Water
Adhesives
Water

Figure

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  Figure 1 Specimens; end of enamel rod (left) and side of enamel rod (right).

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  Figure 2 Specimen adhered to the shear testing apparatus.

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