J Korean Acad Conserv Dent.  2008 Sep;33(5):472-480. 10.5395/JKACD.2008.33.5.472.

The influence of cavity configuration on the microtensile bond strength between composite resin and dentin

Affiliations
  • 1Department of Conservative Dentistry, The Graduate School, Yonsei University, Korea. operatys16@yuhs.ac

Abstract

This study was conducted to evaluate the influence of the C-factor on the bond strength of a 6th generation self-etching system by measuring the microtensile bond strength of four types of restorations classified by different C-factors with an identical depth of dentin. Eighty human molars were divided into four experimental groups, each of which had a C-factor of 0.25, 2, 3 or 4. Each group was then further divided into four subgroups based on the adhesive and composite resin used. The adhesives used for this study were AQ Bond Plus (Sun Medical, Japan) and Xeno III (DENTSPLY, Germany). And composite resins used were Fantasista (Sun Medical, Japan) and Ceram-X mono (DENTSPLY, Germany). The results were then analyzed using one-way ANOVA, a Tukey's test, and a Pearson's correlation test and were as follows. 1. There was no significant difference among C-factor groups with the exception of groups of Xeno III and Ceram-X mono (p < 0.05). 2. There was no significant difference between any of the adhesives and composite resins in groups with C-factor 0.25, 2 and 4. 3. There was no correlation between the change in C-factor and microtensile bond strength in the Fantasista groups. It was concluded that the C-factor of cavities does not have a significant effect on the microtensile bond strength of the restorations when cavities of the same depth of dentin are restored using composite resin in conjunction with the 6th generation self-etching system.

Keyword

C-factor; 6th generation dentin bonding agent; Microtensile bond strength; Contraction stress

MeSH Terms

Adhesives
Composite Resins
Dentin
Dentin-Bonding Agents
Humans
Molar
Adhesives
Composite Resins
Dentin-Bonding Agents

Figure

  • Figure 1 Schematic diagrams of the four groups of restoration that varied according to each C-value. Groups with C-factor 0.25 were prepared on the flat ground dentin surfaces. For the other experimental groups, the cavities were prepared below the ground dentin surfaces.

  • Figure 2 Schematic diagram of the specimen of experimental group.

  • Figure 3 Schematic diagram of the preparation of specimen for microtensile bond test.

  • Figure 4 Schematic diagram of the specimen for microtensile bond test.

  • Figure 5 Graph of the mean microtensile bond strength (MPa) of the Fantasista groups. Groups connected with the line are not significantly different according to the one-way ANOVA (p > 0.05)

  • Figure 6 Graph of the mean microtensile bond strength (MPa) of the Ceram-X mono groups. Symbols (*) indicate statistically significance at p = 0.05 level


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