Quality of Root Canals Filled with a Calcium Silicate-Based Sealer using Different Placement Methods: A Micro-CT Study
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Abstract
Objective : This study aimed to compare the volumes of voids and gaps in root canals fillings obtained with the single-cone technique using a calcium silicate-based sealer placed by different methods, as assessed by micro-computed tomography (micro-CT).
Materials and Methods : Sixty extracted mandibular premolars with oval-shaped canals were prepared using nickel-titanium rotary instruments to an apical size of 40/.04 and randomly assigned to three groups according to the sealer placement methods: ST, single-cone technique with a disposable tip; STU, single-cone technique with a disposable tip and ultrasonic activation; and STL, single-cone technique with a disposable tip and a lentulo spiral (n= 20 per group). Each obturated tooth was scanned with micro-computed tomography to evaluate the presence of voids and gaps. The percentage volume of voids and gaps was calculated at the coronal, middle and apical levels. Data were statistically analyzed using the Kruskal-Wallis test and linear mixed model with Bonferroni adjustment at a 5% significance level.
Results : The STL group had the highest total percentage volume of voids (3.971%), whereas the ST group had the highest total percentage volume of gaps (1.428%). Across the entire canal, no significant between-group differences were observed for the percentage volume of either voids or gaps (p>0.05). At the coronal level, the STL group exhibited a significantly greater percentage volume of voids than the other groups (p<0.05), and within the STL group the coronal was significantly higher than the middle and apical levels (p<0.05). No significant differences in percentage volume of gaps were detected between groups or among canal levels (p>0.05).
Conclusion : Within the limitation of this study, no significant differences were found in overall void and gap formation among the three sealer placement methods. However, the use of a lentulo spiral in oval-shaped canals was associated with the highest void volume at the coronal level.
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บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการลงตีพิมพ์ในวิทยาสารทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นถือเป็นลิขสิทธิ์เฉพาะของคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่น หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษร จากคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นก่อนเท่านั้น
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