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J Korean Acad Pediatr Dent. 2006;33(4): 693-698.
MICROTENSILE BOND STRENGTH ACCORDING TO DIFFERENT DENTIN WALL POSITION IN CLASS I CAVITY OF PRIMARY MOLAR
이현헌, 정태련, 김정욱, 장기택
서울대학교 치과대학 소아치과학교실 및 임상치의학연구소
Corresponding Author: 장기택 ,
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ABSTRACT
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.
Keywords: Microtensile bond strength | Class I cavity | Primary molar | C-factor
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