242 Shear Bond Strength of Auto-mixing Self-adhesive Resin Cements to Zirconia

Thursday, March 22, 2012: 2 p.m. - 3:15 p.m.
Presentation Type: Poster Session
K. YOSHIDA1, K. KAMADA2, and Y. TAIRA2, 1Clinics of Fixed Prosthodontics, Nagasaki University Hospital, Nagasaki, Japan, 2Dept. of Applied Prosthodontics, Nagasaki University, Guraduate School of Biomedical Sciences, Nagasaki, Japan

Objectives: This study evaluated the shear bond strengths of four auto-mixing self-adhesive resin cements {Maxcem Elite (Kerr), SpeedCEM (Ivoclar Vivadent), RelyX Unicem 2 Automix (3M ESPE), and GAM-200 (GC)} between dual-cured resin composite for core build-up (UniFil Core EM, GC) and partially-stabilized zirconia ceramic (GC). Methods: Zirconia disk specimens were sanded with grit #600 Silicon-carbide paper (SiC), treated with phosphoric acid gel (PAG, Kuraray) for 5 s, rinsed, and then air-dried (Control) Other specimens were treated with PAG after air-abrading with 50 µm alumina particles (AB). Composite disk specimens were sanded with #600SiC and then treated with PAG. Zirconia and composite disks were bonded together with each self-adhesive resin cement, and then photo-polymerized with a visible-light-curing unit for 40 s. Specimens were stored in water at 37ºC for 24 hrs and/or performed thermal cycling of 10,000 times before shear bond strength testing. Means and SDs (in parenthesis) of shear bond strength (MPa) are listed in Table. Data were analyzed by three-way ANOVA and identical letters were not significantly different by Tukey-Compromise test (p>0.05, n=7). Results: The bond strengths of four self-adhesive resin cements between resin composite and alumina-blasting zirconia were higher than those of control groups before thermal cycling. After thermal cycling, two of four resin cements to alumina-blasting zirconia showed insignificantly decrease of bond strength. Conclusions: These results suggest that bond durability is different between brands and alumina-blasting is necessary for durable bonding of zirconia to resin composite for core build-up with self-adhesive resin cement.



Thermal Cycling

Resin Cement

Surface Treatment



Maxcem Elite


8.6 (1.5)b,c

3.0 (0.7)a


17.9 (3.4)e,f

5.5 (0.6)a,b



13.3 (3.8)d,e

6.7 (2.7)a,b


22.5 (2.7)f,g

23.3 (2.0)g

RelyX Unicem 2 Automix


11.9 (2.9)c,d

5.5 (2.0)a,b


13.9 (2.8)d,e

7.0 (2.3)a,b



21.4 (3.4)f,g

16.2 (2.6)d,e


26.2 (2.1)g

24.7 (1.3)g


Keywords: Adhesion, Cements, Ceramics, Composites and Dental materials
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