“Ex vivo” determination of the clinical anatomic diameter in human maxillary and mandibular molar teeth at different levels

V08N03 | 2018 | Original Article | Pages 47 to 54

Antonio Batista, André Luiz da Costa Michelotto

Endodontics, Root Canal Therapy, Dental Pulp Cavity

Introduction: This investigation aimed to measure the clinical anatomic diameter root canals in human molar teeth at different levels. Methods: Fifty maxillary and fifty mandibular molars were axial cross-sectioned and analyzed at 1mm, 5mm and 9mm from the anatomic apex. The fourth level was in the root canal entrance. The first file adjusted at the root canal walls without pushing was recorded. Mean values and standard deviations were calculated using a paired t test. Results: The diameter means at the root canal entrance (RCE) and cervical level in the disto-buccal canals of maxillary molars and mesio-buccal and mesio-lingual canals of mandibular molars were 30.71 ± 9.74 and 37.10 ± 9.17, 41.80 ± 10.71 and 46.80 ± 10.62, 37.40 ± 10.25 and 44.50 ± 10.64 (mm x 10-2), respectively. At apical third the maxillary molars showed the mean diameters of 22.00 ± 4.79, 21.80 ± 5.81 and 39.40 ± 10.18 for mesio-buccal, disto-buccal and palatal canals respectively. For the mandibular molars the mean was 26.90 ± 9.79, 24.00 ± 6.85 and 36.44 ± 10.18 for the mesio-buccal, mesio-lingual and distal canals. Conclusions: The RCE of disto-buccal canals of maxillary molars and mesial canals of mandibular molars showed smaller diameter than cervical third. Mesial canals of mandibular molars and buccal canals of maxillary molars showed diameter close to # 25 and #20 K-file at 1mm apical level, respectively. Palatal canals of maxillary molars and distal canals of mandibular molars showed diameter close to #40 and #35 K-file at 1mm apical level, respectively.

Batista A, Michelotto ALC. “Ex vivo” determination of the clinical anatomic diameter in human maxillary and mandibular molar teeth at different levels. Dental Press Endod. 2018 Sept-Dec;8(3):47-54. DOI: https://doi.org/10.14436/2358-2545.8.3.047-054.oar

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