TY - JOUR
T1 - Use of micro-CT to examine effects of heat on coronal obturation
AU - Shen, Ivy
AU - Daniel, Joan
AU - Vo, Kali
AU - Ahn, Chul
AU - Primus, Carolyn
AU - Komabayashi, Takashi
N1 - Publisher Copyright:
© 2022, Nihon University, School of Dentistry. All rights reserved.
PY - 2022/7
Y1 - 2022/7
N2 - Purpose: The aim of this study was to categorize the effects of heat on cor-onal obturation with gutta-percha and sealer using X-ray micro-computed tomography (micro-CT). Methods: Ten single-rooted, extracted human teeth were shaped using ProTaper NEXT files to size X5 (#50/Taper 6%) with 2.5% NaOCl irriga-tion. A single ProTaper NEXT X5 gutta-percha point was then inserted with epoxy resin (AH Plus) or tricalcium silicate (EndoSequence BC) sealer (n = 5/group), and cut at the cemento-enamel junction. The teeth were scanned using micro-CT (SkyScan1272) to obtain 11 sagittal 2-D images. Three calibrated raters categorized the coronal 0.5 mm of the images into four categories: “swirled sealer and/or gutta-percha without voids” (I), “uniform voids and sealer/gutta-percha” (II), “non-uniform voids and sealer/gutta-percha” (III), and “swirled sealer and/or gutta-percha with voids” (IV). Intra-rater and inter-rater reliability were then calculated. Chi-square tests were conducted to determine the significance of differences in each category between sealers. Results: The intra-class correlation coefficient was 0.55 (same rater/two different times) and Fleiss’ kappa (different raters/same image) was 0.34. Categories I, II, III, and IV accounted for 16.4%, 4.2%, 30.3%, and 49.1% for AH Plus, and 6.7%, 4.2%, 27.3%, and 61.8% for EndoSequence BC, respectively. Conclusion: Category IV was most common and Category II the least common. Significant differences were evident between sealers for Category I (P < 0.01).
AB - Purpose: The aim of this study was to categorize the effects of heat on cor-onal obturation with gutta-percha and sealer using X-ray micro-computed tomography (micro-CT). Methods: Ten single-rooted, extracted human teeth were shaped using ProTaper NEXT files to size X5 (#50/Taper 6%) with 2.5% NaOCl irriga-tion. A single ProTaper NEXT X5 gutta-percha point was then inserted with epoxy resin (AH Plus) or tricalcium silicate (EndoSequence BC) sealer (n = 5/group), and cut at the cemento-enamel junction. The teeth were scanned using micro-CT (SkyScan1272) to obtain 11 sagittal 2-D images. Three calibrated raters categorized the coronal 0.5 mm of the images into four categories: “swirled sealer and/or gutta-percha without voids” (I), “uniform voids and sealer/gutta-percha” (II), “non-uniform voids and sealer/gutta-percha” (III), and “swirled sealer and/or gutta-percha with voids” (IV). Intra-rater and inter-rater reliability were then calculated. Chi-square tests were conducted to determine the significance of differences in each category between sealers. Results: The intra-class correlation coefficient was 0.55 (same rater/two different times) and Fleiss’ kappa (different raters/same image) was 0.34. Categories I, II, III, and IV accounted for 16.4%, 4.2%, 30.3%, and 49.1% for AH Plus, and 6.7%, 4.2%, 27.3%, and 61.8% for EndoSequence BC, respectively. Conclusion: Category IV was most common and Category II the least common. Significant differences were evident between sealers for Category I (P < 0.01).
KW - endodontic sealers
KW - epoxy resin
KW - heat
KW - micro-CT
KW - tricalcium silicate
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U2 - 10.2334/josnusd.22-0013
DO - 10.2334/josnusd.22-0013
M3 - Article
C2 - 35661644
AN - SCOPUS:85133714549
SN - 1343-4934
VL - 64
SP - 224
EP - 227
JO - Journal of Oral Science
JF - Journal of Oral Science
IS - 3
M1 - josnusd/22-0013
ER -