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Minerva Dental and Oral Science 2022 June;71(3):131-8

DOI: 10.23736/S2724-6329.21.04588-5


lingua: Inglese

A micro-computed tomographic analysis of obturation quality and retreatability of an epoxy resin-based sealer

Roula S. ABIAD 1, Prasanna NEELAKANTAN 2, Ivan BUSCEMA 3, Islam A. ALI 2, Gianluca CONTE 3, Giusy R. M. LA ROSA 3 , Luigi GENERALI 4, Marco CICCIÙ 5, Eugenio PEDULLÀ 3

1 Division of Endodontology, Faculty of Dentistry, Beirut Arab University, Beirut, Lebanon; 2 Discipline of Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; 3 Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy; 4 School of Dentistry, Section of Endodontics, Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance (CHIMOMO), University of Modena and Reggio Emilia, Modena, Italy; 5 Department of Biomedical and Dental Sciences, Morphological and Functional Images, University of Messina, G. Martino University Hospital, Messina, Italy

BACKGROUND: To evaluate the voids percentage and the retreatability by different supplementary irrigation techniques of a matched-taper single cone and epoxy resin-based sealer.
METHODS: A total of 72 single-rooted premolars were prepared and filled with gutta-percha and MM-Seal. The percentage of voids in the whole root canal and each anatomical part were evaluated by Micro-CT scans. After root filling removal, the teeth were randomly allocated (N.=24) to group A, syringe irrigation; group B, Tornado Brush, and group C, ultrasonically activated irrigation and re-scanned to establish the volume of remnant root filling material. The data relative to voids and retreatment techniques were established by the Kruskal-Wallis test. Differences in retreatment time were examined using one-way ANOVA and Tukey’s Test (P<0.05).
RESULTS: No significant difference was found in the voids percentage between the different root-thirds and between the supplementary irrigation groups in the MM-Seal remnants for the whole root canal and each section. In all groups, the coronal region exhibited more remaining material than other sections.
CONCLUSIONS: MM-Seal showed low voids percentage and its removal was not significantly improved by supplementary irrigation techniques.

KEY WORDS: Endodontics; X-ray microtomography; Retreatment

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