열가소성 거타퍼차 근관충전재료의 열분석과 열연화 특성
DSC/TG Analysis and Temperature-dependent Softening Characteristics of Thermoplastic Gutta-Percha Obturation Materials
한옥성, 문현주, 송요한, 황문진, 송호준, 박영준,
소속 상세정보
한옥성 ( Han Ok-Sung ) - 전남대학교 치의학전문대학원 치과재료학교실
문현주 ( Moon Hyun-Joo ) - 전남대학교 치의학전문대학원 치과재료학교실
송요한 ( Song Yo-Han ) - 전남대학교 치의학전문대학원 치과재료학교실
황문진 ( Hwang Moon-Jin ) - 전남대학교 치의학전문대학원 치과재료학교실
송호준 ( Song Ho-June ) - 전남대학교 치의학전문대학원 치과재료학교실
박영준 ( Park Young-Jun ) - 전남대학교 치의학전문대학원 치과재료학교실
KMID : 1035320140410030215
Abstract
Various brands of thermoplastic gutta-percha (GP) obturation materials are on the market, and knowledge of their thermal behaviors is of a great interest to clinicians using warm GP technique. In this study, the thermal properties of eleven commercial brands of GP materials were investigated by differential scanning calorimetery (DSC) and thermogravimetric analysis (TGA). The relationship of the thermal properties of the tested materials to their resistance forces against the trigger squeezing action was also evaluated. From the DSC analysis results, all products demonstrated thermal behaviors of typical beta-phase gutta-percha showing major endothermic peaks at 48-50℃ and 53-61℃ exhibiting beta- to alpha- crystalline transformations and alpha- to amorphous transformation, respectively. The TGA data indicated that remaining weights of B&L-H, Dia-H and Sure-H products after heating up to 600℃ were higher than those of their soft type products, B&L-S, Dia-S, and Sure-S materials, respectively. The remaining weights and resistance force to trigger squeezing action of the tested materials were well corresponded with the viscosity-types designated by the suppliers.
키워드
Endodontic obturation; Thermal property; Thermoplastic gutta-percha; Trigger squeezing force
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