Bond Strength of Resin Cements to Indirect Composite Resins

0240 Bond Strength of Resin Cements to Indirect Composite Resins

M. GHULMAN, N. ASHAYERI, and D. NATHANSON, Boston University, MA, USA

Bond Strength of Resin Cements to Indirect Composites Resins
M. GHULMAN, D. NATHANSON, and N. ASHAYERI, Boston University, USA
Objectives: To evaluate the bond between resin cements and indirect resins. Methods: The study included 4 indirect resins: a. Gradia (GC), b. Sculpture (Pentron), c. Sinfony (3M-ESPE), and d. Tescera (BISCO), and 4 resin cements: 1. Illusion (BISCO), 2. Link-Max (GC), 3. Lute-It (Pentron), and 4. Rely-X ARC (3M-ESPE) with their respective adhesive systems. 160 round indirect resin samples (10 x 2 mm) were prepared. Cylindrical-shaped resin cement samples (2.3 x 3 mm) were formed by positioning a split mold over the indirect resin sample. Shear bond strength was tested, using an Instron testing machine.

Gradia

Sculpture

Sinfony

Tescera

Illusion

24.51 (6.36)^A

18.49 (3.47)^A

24.23 (6.56)^A

19.39 (3.98)^A

Link-Max

35.5 (8.13)^B

16.8 (5.2)^A

27.45 (7.02)^A

16.46 (5.29)^AB

Lute-It

23.28 (6.63)^A

20.8 (5.57)^A

26.58 (4.76)^A

12.89 (2.93)^B

Rely-X ARC

24.01 (7.34)^A

19.8 (2.04)^A

21.42 (8.17)^A

16.39 (4.35)^AB

*Superscript letters represent statistically equivalent means within each indirect resin.

Results: Bond strength of cements to indirect resins ranged from 12.89 (2.93) to 35.5 (8.13) MPa. Overall, significantly higher bond strengths were found for Gradia and Sinfony indirect resins (p=.027). Link-Max had a significantly higher bond strength to Gradia that all other cements (p=.001). Illusion had a significant higher bond to Tescera than Lute-It (p=.015). Conclusion: All cement systems tested produced adequate bond strengths, but certain cement-resin combinations exhibited significantly higher bond strengths.

Seq #40 - Cements: Properties and Bonding
11:00 AM-12:15 PM, Thursday, 13 March 2003 Henry B. Gonzalez Convention Center Exhibit Hall C

Back to the Dental Materials: III - Ceramics and Cements Program
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