3종의 간접수복용 복합레진의 굴곡강도 비교 및 표면관찰
Evaluation of Flexural strength and surface porosity of three indirect composite resins
김준태, 박진영, 김웅철, 김지환,
소속 상세정보
김준태 ( Kim Jun-Tae ) - 고려대학교 대학원 보건과학과
박진영 ( Park Jin-Young ) - 고려대학교 대학원 보건과학과
김웅철 ( Kim Woong-Chul ) - 고려대학교 대학원 보건과학과
김지환 ( Kim Ji-Hwan ) - 고려대학교 대학원 보건과학과
KMID : 0362120170390010009
Abstract
Purpose: The purpose of this study was to evaluate flexural strength, composite surface and fractured surface of three
different indirect composite resins.
Methods: Fifteen bar-shaped specimens (25mm x 2mm x 2mm) were fabricated for each FL group (Flow type and Light
curing) and PLP group (Putty type and Light, Pressure curing) and PL group (Putty type and Light curing) according to
manufacturer’s instructions and ISO 10477. Fabricated specimens were stored in the distilled water for 24 hours at the
temperature of 37℃. Three-point bending strength test was performed to measure flexural strength using universal testing
machine at a crosshead speed of 1mm/min (ISO 10477). Surface and fractured surface of specimens were observed by
digital microscope. Results were analyzed with Kruskal-wallis tests (α = 0.05).
Results: Mean (SD) of three different indirect composite resins were 83.38 (6.67) MPa for FL group, 139.90(16.53) MPa
for PLP group and 171.72(16.74) MPa for PL group. Flexural strength were statistically significant (p<0.05). Differences
were not observed at fractured surface among three groups. However, many pores over 100㎛ were observed at PL group
in observing surface of specimen.
Conclusion: Flexural strength of composite resins was affected by second polymerization method and content of
inorganic filler.
키워드
composite resins ; flexural strength ; heat curing ; light curing ; inorganic filler
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