Micro-CT and nano-CT analysis of filling quality of three different endodontic sealers

Author(s)

Huang, Yan ^{[1, 2]} ; Celikten, Berkan ^[1] ; Vasconcelos, Karla de Faria ^{[1, 3]} ; Pinheiro Nicolielo, Laura Ferreira ^[1] ; Lippiatt, Nicholas ^[4] ; Buyuksungur, Arda ^{[5, 6]} ; Jacobs, Reinhilde ^{[1, 7]} ; Orhan, Kaan ^[8]

Affiliation

^[1] Katholieke Univ Leuven, OMFS IMPATH, Oral & Maxillofacial Surg Imaging & Pathol, Leuven - Belgium

^[2] Sichuan Univ, State Key Lab Oral Dis, West China Coll Stomatol, Chengdu, Sichuan - Peoples R China

^[3] Univ Estadual Campinas, Piracicaba Dent Sch, Div Oral Radiol, Dept Oral Diag, Piracicaba - Brazil

^[4] Katholieke Univ Leuven, Dept Mat Engn Mat Performance & Nondestruct Testi, Leuven - Belgium

^[5] Middle East Tech Univ, BIOMATEN, Ankara - Turkey

^[6] Middle East Tech Univ, Dept Biotechnol, Ankara - Turkey

^[7] Karolinska Inst, Dept Dent Med, Stockholm - Sweden

^[8] Ankara Univ, Dept Dento Maxillofacial Radiol, Ankara - Turkey

• Document type: Journal article
• Source: Dentomaxillofacial Radiology; v. 46, n. 8 2017.
• Web of Science Citations: 1

Abstract

Objectives: To investigate voids in different root canal sealers using micro-CT and nano-CT, and to explore the feasibility of using nano-CT for quantitative analysis of sealer filling quality. Methods: 30 extracted mandibular central incisors were randomly assigned into three groups according to the applied root canal sealers (Total BC Sealer, Sure Seal Root, AH Plus) by the single cone technique. Subsequently, micro-CT and nano-CT were performed to analyse the incidence rate of voids, void fraction, void volume and their distribution in each sample. Results: Micro-CT evaluation showed no significant difference among sealers for the incidence rate of voids or void fraction in the whole filling materials (p > 0.05), whereas a significant difference was found between AH Plus and the other two sealers using nano-CT (p < 0.05). All three sealers presented less void volume in the apical third; however, higher void volumes were observed in the apical and coronal thirds in AH Plus using micro-CT (p < 0.05), while nano-CT results displayed higher void volume in AH Plus among all the sealers and regions (p < 0.05). Conclusions: Bioactive sealers showed higher root filling rate, lower incidence rate of voids, void fraction and void volume than AH Plus under nano-CT analysis, when round root canals were treated by the single cone technique. The disparate results suggest that the higher resolution of nano-CT have a greater ability of distinguishing internal porosity, and therefore suggesting the potential use of nano-CT in quantitative analysis of filling quality of sealers. (AU)

• FAPESP's process: 14/17744-5 - Effectiveness of algorithms artifacts reduction in tomographic images
• Grantee: Karla de Faria Vasconcelos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral