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Vazquez-Alcaraz S, Gancedo-Caravia L, Arias A, Bascones J. Performance of obturation techniques in anatomical irregularities located at different thirds of the root canal system. J Appl Oral Sci 2024; 32:e20230440. [PMID: 38775557 PMCID: PMC11178349 DOI: 10.1590/1678-7757-2023-0440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 03/13/2024] [Accepted: 04/05/2024] [Indexed: 06/16/2024] Open
Abstract
This study aimed to compare the quality of root canal obturation (ratio of area occupied by gutta-percha (G), sealer (S), and presence of voids (V)) in different anatomical irregularities (intercanal communications, lateral irregularities, and accessory canals) located at different thirds of the root canal system of mandibular molar replicas. Sixty-seven 3D printed replicas of an accessed mandibular molar were prepared using ProGlider and ProTaper Gold rotatory systems. Three specimens were randomly selected to be used as controls and did not receive further treatment. The rest were randomly distributed in 4 experimental groups to be obturated using either cold lateral compaction (LC), continuous wave of condensation (CW), and core-carrier obturation (ThermafilPlus (TH) or GuttaCore (GC)) (n=16 per group). AHPlus® sealer was used in all groups. The three controls and a specimen from each experimental group were scanned using micro-computed tomography. The rest of the replicas were sectioned at the sites of anatomical irregularities and examined at 30× magnification. The G, S, and V ratios were calculated dividing the area occupied with each element by the total root canal area and then compared among groups using the Kruskal-Wallis test. Voids were present in all obturation techniques with ratios from 0.01 to 0.15. CW obtained a significantly higher G ratio in the irregularity located in the coronal third (0.882) than LC (0.681), TH (0.773), and GC (0.801) (p<0.05). TH and GC achieved significantly higher G ratios in those located in the apical third (p<0.05). The worst quality of obturation was observed in the loop accessory canal with all obturation techniques. Whitin the limitations of this study, it can be concluded that CW and core-carrier obturation are respectively the most effective techniques for obturating anatomical irregularities located in the coronal and the apical third.
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Affiliation(s)
- Silverio Vazquez-Alcaraz
- Universidad Complutense de MadridFacultad de OdontologíaDepartamento de Odontología Conservadora y PrótesisEspañaUniversidad Complutense de Madrid, Facultad de Odontología, Departamento de Odontología Conservadora y Prótesis, España
| | - Lucia Gancedo-Caravia
- Universidad Complutense de MadridFacultad de OdontologíaDepartamento de Odontología Conservadora y PrótesisEspañaUniversidad Complutense de Madrid, Facultad de Odontología, Departamento de Odontología Conservadora y Prótesis, España
| | - Ana Arias
- Universidad Complutense de MadridFacultad de OdontologíaDepartamento de Odontología Conservadora y PrótesisEspañaUniversidad Complutense de Madrid, Facultad de Odontología, Departamento de Odontología Conservadora y Prótesis, España
| | - Jaime Bascones
- Universidad Complutense de MadridFacultad de OdontologíaDepartamento de Odontología Conservadora y PrótesisEspañaUniversidad Complutense de Madrid, Facultad de Odontología, Departamento de Odontología Conservadora y Prótesis, España
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Tonelli SQ, Sousa-Neto MD, Leoni GB, Brito-Júnior M, Pereira RD, Oliveira PAXD, Nunes E, Silveira FF. Micro-CT evaluation of maxillary first molars: interorifice distances and internal anatomy of the mesiobuccal root. Braz Oral Res 2021; 35:e060. [PMID: 33909867 DOI: 10.1590/1807-3107bor-2021.vol35.0060] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 01/08/2021] [Indexed: 12/27/2022] Open
Abstract
This study aimed to describe the morphometric relationship of root canal orifices on the pulp floor in the presence/absence of mesiobuccal second canal (MB2) in the maxillary first molars and other aspects of its internal anatomy. Sixty-two maxillary first molars were scanned by micro-CT. The presence of the MB2 canal was verified. The distance between the center points of the MB1, MB2, distobuccal (DB), and palatal (P) canal orifices on the pulp floor were measured (MB1-MB2, MB1-DB, MB2-DB, MB1-P, and DB-P). The MB1-P to DB-P ratio was calculated. The distances between the anatomic apex and the MB1 and MB2 apical foramina were measured. The length of the band-shaped isthmus was also measured. Student's t-test was applied to verify the association between the presence of an MB2 canal, the interorifice distances, and the ratio of the MB1-P to DB-P distance (α = 5%). The MB2 canal was present in 43 roots (69.35%). Statistics showed significant differences when MB2 was present for the largest MB1-P distance (p < 0.05) and higher values for the MB1-P to DB-P ratio (p < 0.05). A band-shaped isthmus was detected in 25.8% of MB roots. The mean distance from the apical foramen to the isthmus floor ranged from 1.74 for MB1 canals to 1.42 for MB2 canals. Canal orifice distances on the pulp floor may predict the presence of MB2 canals. There was a high incidence of isthmus, accessory canals, and apical delta in the critical apical zone in MB roots of maxillary first molars.
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Affiliation(s)
- Stéphanie Quadros Tonelli
- Pontifícia Universidade Católica de Minas Gerais - PUCMG, Department of Dentistry, Belo Horizonte, MG, Brazil
| | - Manoel Damião Sousa-Neto
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Graziela Bianchi Leoni
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Manoel Brito-Júnior
- Universidade Estadual de Montes Claros - Unimontes, Department of Dentistry, Montes Claros, MG, Brazil
| | - Rodrigo Dantas Pereira
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | | | - Eduardo Nunes
- Pontifícia Universidade Católica de Minas Gerais - PUCMG, Department of Dentistry, Belo Horizonte, MG, Brazil
| | - Frank Ferreira Silveira
- Pontifícia Universidade Católica de Minas Gerais - PUCMG, Department of Dentistry, Belo Horizonte, MG, Brazil
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