Yan Huang1,2, Berkan Celikten1,3, Karla de Faria Vasconcelos1,4, Laura Ferreira Pinheiro Nicolielo1, Nicholas Lippiatt5, Arda Buyuksungur6, Reinhilde Jacobs1,7, Kaan Orhan7. 1. 1 Oral and Maxillo-facial Surgery - Imaging and Pathology (OMFS-IMPATH), KU LEUVEN, Leuven, Belgium. 2. 2 State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China. 3. 4 Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil. 4. 5 Department of Materials Engineering, Materials Performance and Non-Destructive Testing, KU Leuven, Leuven, Belgium. 5. 6 BIOMATEN and Department of Biotechnology, Middle East Technical University, Ankara, Turkey. 6. 7 Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden. 7. 8 Department of DentoMaxillofacial Radiology, Ankara University, Ankara, Turkey.
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.
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.
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