EFFECT OF THE ADDITIONAL ETCHING PROCEDURE ON PUSH-OUT BOND STRENGTH OF ONE-STEP RESIN CEMENT

Article information

Restor Dent Endod. 2008;33(5):443-451
Publication date (electronic) : 2008 January 14
doi : https://doi.org/10.5395/JKACD.2008.33.5.443
Department of Conservative Dentistry, School of Dentistry, Pusan National University
*Corresponding Author: Hyeon-Cheol Kim, Department of Conservative Dentistry, School of Dentistry, Pusan National University, 1-10, Ami-Dong, Seo-Gu, Busan, 602-739, Korea, Tel: 82-51-240-7978 E-mail: golddent@pusan.ac.kr
Received 2008 July 02; Revised 2008 August 04; Accepted 2008 August 12.

Abstract

Abstract

The purpose of this study was to evaluate the effect of additional etching procedure prior to Maxcem resin cement application in indirect restoration cementation using push-out bonding strength.

One hundred and two extracted human molars were used to make indirect resin restorations of gold inlay and Synfony. These restorations were cemented using Maxcem and Variolink II. Additional etching procedures were done for one group with Maxcem. Three groups have 17 specimens in both restoration types. Push-out bond strength was measured using multi-purpose tester and calculated for bonding strength per sqaure-millimeter area. The mean bonding strength values were compared using SPSS 12.0K program for one-way ANOVA and Scheffe's Test with 95% significance.

Under the condition of this study, the additional etching procedure prior to usage of Maxcem resulted in reduced bond strength for both of restoration types.

Figure 1.

Specimen design and dimension (mm) and prepared tooth specimen.

Figure 2.

Push-out bond strength measuring device.

Figure 3.

Representatives of SEM examination of failure surfaces of A; GMC, B; GME, C; GVL, D; RMC, E; RME, and F; RVL.

Bonding systems used in this study

Group classification and adhesive methods for each groups

Push-out bond strength (N/㎜2)

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Article information Continued

Figure 1.

Specimen design and dimension (mm) and prepared tooth specimen.

Figure 2.

Push-out bond strength measuring device.

Figure 3.

Representatives of SEM examination of failure surfaces of A; GMC, B; GME, C; GVL, D; RMC, E; RME, and F; RVL.

Table 1.

Bonding systems used in this study

Brand of Resin cement Adhesive system Composition
Variolink II Total Etch; 37% phosphoric acid
Excite DSC; HEMA*, dimethacrylate, phosphonic
Total-etching   acid acrylate, silicon dioxide
Adhesive resin; Bis-GMA**, urethane
  dimethacrylate, filler

Maxcem Base Paste; Uretanedimethacrylate,
Self-etching   Camphoroquinone, Fluoroaluminosilicate, other
& Catalyst Paste; Bis-GMA**,
Self-adhesive   Triethyleneglycoldimethacrylate,
  Glycerophosphatedimethacrylate, other
*

HEMA; Hydroxyethylmethacrylate

**

Bis-GMA; Bisphenol-A-glycidyldimethacrylate

Table 2.

Group classification and adhesive methods for each groups

Group Type of restoration Brand of cement Procedure
Group GMC Gold inlay Maxcem m.i
Group GME Gold inlay Maxcem additional etching
Group GVL Gold inlay Variolink Ⅱ m.i
Group RMC Synfony Maxcem m.i
Group RME Synfony Maxcem additional etching
Group RVL Synfony Variolink Ⅱ m.i

m.i.; according to the manufacturer's instruction

Table 3.

Push-out bond strength (N/㎜2)

Group (n = 17) Push-out bond strength (mean ± SD) Statistic analysis (p < 0.05)
Group GMC 5.99 ± 2.12 AB
Group GME 4.41 ± 2.44 BC
Group GVL 7.14 ± 1.60
A
Group RMC 4.63 ± 1.82 B
Group RME 2.49 ± 1.61 C
Group RVL 7.13 ± 1.76 A

ABC; Significant difference between groups was indicated with different letters (p < 0.05).