636 Shear Bond Strength to Restorative Materials and Tooth Structure

Friday, March 23, 2012: 8 a.m. - 9:30 a.m.
Presentation Type: Oral Session
J. BURGESS, S. SHAH, D. CAKIR, P. BECK, and L. RAMP, University of Alabama at Birmingham, Birmingham, AL

Objectives: 1) Measure 24hr and thermocycled shear bond strength/(SBS) of Scotchbond Universal/3M ESPE to ParadigmC, LAVA core, IPS e.max CAD, gold and base metal alloy 2) Measure 24hr and 10month SBS of an experimental adhesive to unetched and etched ground human dentin and enamel.

Methods: ParadigmC, e.maxCAD, LAVA blocks and non-noble metal alloy were sectioned (t=4mm). Noble metal alloy was received in 2mm thick blocks. Specimens were polished (180-, 320-grit SiC-paper/4mins), finished (0.5 Al2O3 slurry/2mins) and cleaned (ultrasonic/distilled water/15seconds). Molars were wet-ground (320-grit) to obtain flat enamel and dentin. Following surface treatments (table) and bonding agent application, Z100/3M-ESPE cylinders (d=1.5mm) were bonded and light-cured (Elipar/S10/3M-ESPE/1000mW/cm2). Half were debonded after 24hrs storage/37C (Instron-1mm/min). Remainder of ceramic and alloy specimens were debonded after thermocycling (10,000cycles/6-60C/15sec dwell time). Remaining enamel and dentin specimens were stored for 10months after thermocycling then debonded. Data analyzed with ANOVA and Tukey/Kramer post-hoc tests (p=0.05).

Material

ParadigmC/e.max CAD

(3M ESPE/Ivoclar)

Lava/3MESPE

Metal Alloys/Ivoclar

Single Bond Plus/SBP/3M-ESPE

HF Etch-Sultan/EspeSil-3MESPE

CoJet-30m-3MESPE/EspeSil

Al2O3-50m /Metal PrimerII-GC

HF etch/RelyX-Ceramic Primer-3MESPE

Al2O3-50m /Z-Prime-Bisco

Scotchbond Universal/SU/3M-ESPE

HFetch-Sultan

Al2O3-50m

Results: MPa/(MeanSD) Same letters in same row are not statistically different.

 

SU/Unetched

SU/Etched

Easy Bond/EB

SBP

Enamel/24hr

26.85B

33.66A,C

27.66A,B

37.48C

Dentin/24hr

30.49A

28.45A

347A

267A

Enamel/10months

238A

37.28B

20.78A

38.710B

Dentin/10months

29.911A

28.611A

38.98A

3412A

 

 

SBP/Silane

SBP/RelyX-Ceramic Primer

SU/HF-Etch

e.maxCAD/24hr

36.84A

40.67A

34.27A

ParadigmC/24hr

44.116A

32.712A,B

26.38B

e.maxCAD/10,000cycles

28.96A

32.16A

154B

ParadigmC/10,000cycles

38.94A

2710A

27.45A

 

 

SBP/Cojet+Silane

SBP/Al2O3+Z Prime

SU/Al2O3

LAVA/24hr

19.85A

32.37B

37.55B

LAVA/10,000cycles

25.69A

29.46A

30.44A

 

 

SBP/Al2O3+Metal Primer

SU/Al2O3

Base-Metal/24hr

29.15A

40.25B

Noble-Metal/24hr

30.65A

29.14A

Base-Metal/10,000cycles

27.56A

32.36A

Noble-Metal/10,000cycles

25.46A

16.53A

Long term storage did not affect enamel and dentin SBS.

SBS decreased after 10,000 thermal cycles for:

e.max: SBP/Silane, SU

Zirconia: SU

Base Metal Alloy: SU

Noble Metal Alloy: SBP, SU

Conclusions: Scotchbond Universal is a promising universal adhesive. Supported in part by 3MESPE


Keywords: Adhesion, Alloys, Ceramics, Dentin and Enamel
<< Previous Abstract | Next Abstract