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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 27 - 33 (7page)
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초록· 키워드
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Objectives: To determine the optimal timing for post space preparation of root canals sealed with epoxy resin-based AH Plus sealer in terms of its polymerization and influence on apical leakage. Materials and Methods: The epoxy polymerization of AH Plus (Dentsply DeTrey) as a function of time after mixing (8, 24, and 72 hours, and 1 week) was evaluated using Fourier transform infrared (FTIR) spectroscopy and microhardness measurements. The change in the glass transition temperature (Tg) of the material with time was also investigated using differential scanning calorimetry (DSC). Fifty extracted human single-rooted premolars were filled with gutta-percha and AH Plus, and randomly separated into five groups (n = 10) based on post space preparation timing (immediately after root canal obturation and 8, 24, and 72 hours, and 1 week after root canal obturation). The extent of apical leakage (mm) of the five groups was compared using a dye leakage test. Each dataset was statistically analyzed by one-way analysis of variance and Tukey’s post hoc test (α = 0.05). Results: Continuous epoxy polymerization of the material with time was observed. Although the Tg values of the material gradually increased with time, the specimens presented no clear Tg value at 1 week after mixing. When the post space was prepared 1 week after root canal obturation, the leakage was significantly higher than in the other groups (p < 0.05), among which there was no significant difference in leakage. Conclusions: Poor apical seal was detected when post space preparation was delayed until 1 week after root canal obturation. (Restor Dent Endod 2017;42(1):27-33)
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등록된 정보가 없습니다.
참고문헌 (23)
참고문헌 신청
American Society for Testing and Materials / 2014 / ASTM E1356-08. Standard test method for assignment of the glass transition temperatures by differential scanning calorimetry / Annu
Amin SA / 2012 / The effect of prior calcium hydroxide intracanal placement on the bond strength of two calcium silicate-based and an epoxy resin-based endodontic sealer / J
Arab B / 2013 / Molecular dynamics simulation of cross-linked epoxy polymers: the effect of force field on the estimation of properties / J Nano- Electron Phys 5 : 01013 ~
Baldi JV / 2012 / Variability of physicochemical properties of an epoxy resin sealer taken from different parts of the same tube / Int Endod J 45 : 915 ~ 920
Chen G / 2011 / Effect of immediate and delayed post space preparation on apical leakage using three root canal obturation techniques after rotary instrumentation / J Formos
Amin SA / 2012 / The effect of prior calcium hydroxide intracanal placement on the bond strength of two calcium silicate-based and an epoxy resin-based endodontic sealer / J
Arab B / 2013 / Molecular dynamics simulation of cross-linked epoxy polymers: the effect of force field on the estimation of properties / J Nano- Electron Phys 5 : 01013 ~
Baldi JV / 2012 / Variability of physicochemical properties of an epoxy resin sealer taken from different parts of the same tube / Int Endod J 45 : 915 ~ 920
Chen G / 2011 / Effect of immediate and delayed post space preparation on apical leakage using three root canal obturation techniques after rotary instrumentation / J Formos
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