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KMID : 0358920060330040693
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Journal of the Korean Academy of Pedodontics
2006 Volume.33 No. 4 p.693 ~ p.698
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MICROTENSILE BOND STRENGTH ACCORDING TO DIFFERENT DENTIN WALL POSITION IN CLASS I CAVITY OF PRIMARY MOLAR
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Lee Hyeon-Heon
Jung Tae-Ryun
Kim Jung-Wook
Jang Ki-Taeg
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Abstract
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In Class I cavity, the highest C-factor could be obtained and it means the highest polymerization shrinkage stress. In this study, high C-factor model was designed. The pulpose of present study was to determine differences of Microtensile bond strength (MTBS) of class I cavity pulpal and axial wall specimens in primary molar.
Twenty clean mandibular 2nd primary molars were randomly divided into two groups Different composite Resins (Filtek Z250, 3M ESPE & Filtek Supreme, 3M ESPE) were bulk filled and photo cured. Axial wall specimens and pulpal specimens were prepared at the same teeth, All specimens were divided into 4 groups and MTBS were evaluated. Group ZP : Filtek Z250-Pulpal wall Group ZA : Filtek Z250-Axial wall Group SP : Filtek Supreme - Pulpal wall Group SA : Filtek Supreme - Axial wall The results were as follows:
1. Mean MTBS of ZP & ZA and SP & SA were significantly different(p<.001).
2. There was no significant difference between MTBS of ZP & SP and ZA & SA.
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KEYWORD
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Microtensile bond strength, Class I cavity, Primary molar, C-factor
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