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Published on: July 30, 2007
Evaluation of bond strength in customizing fiber post using translucent resins photoactivated by different
Antonia Patricia O Barros1, Joatan Lucas de Sousa Gomes Costa1,2, Alencar Cristiane de Melo3
1Department of Restorative Dentistry, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil.
Aims:
The objective of the study was to evaluate two translucent resin composite systems for customizing light-polymerized fiber posts with light-emitting diode (LED) curing units regarding adhesion using conventional cement at 24 h and 6 months.
Settings And Design:
This was an experimental in vitro study.
Methods:
Forty roots were prepared and divided into four groups (n = 10): ZV-Z350 resin and LED Valo; ZR-Z350 resin and LED Radii-Cal; OV-Opallis resin and LED Valo; and OR-Opallis resin and LED Radii-Cal. The fiber post was customized and cemented with conventional resin cement and was photoactivated by two different sources.
Statistical Analysis Used:
The data were subjected to two-way ANOVA and Tukey's post hoc tests (P = 0.05). The data regarding the pattern of adhesive failures were described in terms of the frequency of occurrence in each third of the postspace.
Results:
Both at 24 h and 6 months, bond strength among groups was similar, regardless of the analyzed postspace 3rd (P > 0.05). Adhesive failure Type 4 was the most frequent in all thirds.
Conclusions:
Customizing the fiber post with Z350 and Opallis has the same effect on bond strength and adhesive failure pattern, regardless of the LED curing units used for photopolymerization.
