ABSTRACT: 0424

SBS of a New Self-Adhesive Cement to Metals and Ceramics

T.T. NGUYEN, T.D. NGUYEN, X. QIAN, and D. TOBIA, Kerr Corporation, Orange, CA, USA

Objective: To measure the shear bond strengths of a new paste/paste dual-curable self-adhesive resin cement Maxcem Elite (Kerr) to gold alloy, rexillium alloy, Lava (3M ESPE) and Vitablocs Mark II (Vident) in self-cure mode, along with several commercial self-adhesive resin cements: G-Cem (GC America), Maxcem (Kerr), MonoCem (Shofu), and Unicem Clicker (3M ESPE). Methods: All substrates were polished with 600 grit SiC paper and were subsequently air-abraded with aluminum oxide particles. All metal substrates received no further treatment (etch or primer) before bonding. For Vitablocs, the surface was further etched with 9.5% HF etchant (Gresco Products Inc.) before bonding. A bonding jig (Ultradent Products, Inc) with a cylindrical mold (D=2.38mm) was securely placed on the substrate surface and the each cement was condensed into the mold and allowed to self-cure. The specimens (n=6) were then stored under 85~90% relative humidity at 37°C for 24 hours before being subjected to shear force on an Instron mechanical tester. Results: ANOVA analysis revealed that the bond strengths of Maxcem Elite to Rexillium and Lava were significantly (p<0.05) higher than those of other cements tested. The bond strength of Maxcem Elite to Gold was significantly (p<0.05) higher than those of other cements with the exception of Maxcem. The bond strength of Maxcem Elite to Vitablocs was significantly (p<0.05) higher than those of other cements with the exception of Maxcem and G-Cem.

Shear Bond Srength (SBS), MPa

Maxcem Elite

Maxcem

Unicem

MonoCem

G-Cem

Gold Alloy

26.5±1.1^a*

24.2±3.7^a,b

19.3±3.2^b,c

17.8±2.7^c

14.7±3.0^c

Rexillium Alloy

36.4±3.9^a

26.0±4.9^b,c

14.5±4.2^d

27.9±4.0^b

20.1±3.1^c,d

Lava (Zirconia)

28.3±4.1^a

19.1±1.9^b

15.6±4.7^b,c

15.6±2.2^b,c

11.3±1.4^c

Vitablocs Mark II

30.1±1.7^a

23.0±4.0^a,b

21.3±4.2^b

22.0±4.3^b

23.3±5.9^a,b

*Means with the different letters within the same row are statistically different at p < 0.05.

Conclusions: Maxcem Elite had the highest SBS to all substrates among all cements tested in this study.

Seq #73 - Cement Bond to Ceramics, Orthodontic Cements, Post and Crown Cementation
2:00 PM-3:15 PM, Thursday, July 3, 2008
Metro Toronto Convention Centre Exhibit Hall D-E

Back to the Dental Materials 3: Ceramic-based Materials and Cements Program