구치부 수복용 복합레진의 파괴특성에 관한 Acoustic Emission 연구
Acoustic emission analysis for fracture characteristics of dental posterior composites
이정현, 김성환,
소속 상세정보
이정현 ( ) - 경희대학교
김성환 ( ) - 경희대학교 식품공학과
KMID : 0362319920170010153
Abstract
Dental composite resin is a kind of the particle - reinforced composite material, and is widely used in recent dental restoration of anterior and posterior tooth region. The purpose of this study was to investigate the fracture behaviour
according
to
volume fractions and external findings of the filler particles for better interpretation of the fracture characteristics of posterior dental composite resins by analytic method of fracture mechanics. The plane strain fracture toughness(KIC) and
Acoustic
Emission were determined with three - point bending test using the single edge notch specimen according to the ASTM - E399. And its analyzed data was compared with filler volume fractions derived from the standard ashing test and scanning
electron
fractographs of each specimen including the unfilled experimental resin as a control.
The results were that the value of fracture toughness of the composite resin material was in the range from 0.85 MPa √m to 1.60 MPa√m and was higher than the value of the unfilled experimental resin, and the fracture behaviours dervied from
Acoustic
Emission analysis show prominent differences according to the volume fraction and the size of filler particles used in each composite resin. The degree of resistance against crack propagation seems to be increase and the fractographs demonstrate
the
high degree of surface roughness and irregularity according with the increase of fracture toughness value.
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