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Root canal morphology and variations in mandibular second molars: an in vivo cone-beam computed tomography analysis.
Gomez, Francisco; Brea, Gisbeli; Gomez-Sosa, Jose Francisco.
Affiliation
  • Gomez F; Postgraduate Department of Endodontics, Universidad Central de Venezuela, Caracas, Venezuela.
  • Brea G; Postgraduate Department of Endodontics, Universidad Central de Venezuela, Caracas, Venezuela.
  • Gomez-Sosa JF; Postgraduate Department of Endodontics, Universidad Central de Venezuela, Caracas, Venezuela. josefgomezs@gmail.com.
BMC Oral Health ; 21(1): 424, 2021 09 01.
Article in En | MEDLINE | ID: mdl-34470619
BACKGROUND: The purpose of this study was to determine the anatomical variations of the root canal system of mandibular second molars using cone-beam computed tomography (CBCT). METHODS: 190 mandibular second molars cone-beam computed tomography images were reviewed. The evaluation was performed by a radiologist with endodontic experience and two endodontists trained with CBCT technology. Tooth position, number of root and root canals, C-shaped root canal system configuration, presence of extra root (radix), and radicular grooves were assessed. Data was statistically analyzed using The Chi-square test (α = 0,05) to determine any significant difference between gender and the total number of root and root canals, and any significant difference between gender and root canal anatomical variation. RESULTS: Overall, 85.5% showed two separated roots, 12.1% a single root, 2.6% three roots or radix. 87.7% showed three root canals, 12.1% two root canals, 2.6% four root canals, and 1.6% a single root canal. 10% showed a single foramen, 75.3% two foramina, 13.6% three foramina and 1% showed four foramina.19.5% showed C-shaped anatomical variation, 51.4% in male patients, 48.6% in female patients. According to Fan classification: C1 13.6% in cervical third, C2 10% in the middle third, C3 17.3% in middle third, 15.5% in apical third, and C4 12.7% in the apical third. Root canals number in these samples were 5.4% a single canal, 21.6% two canals, 70.3% three canals, and 2.7% four canals. The root showed 46% with one foramen, 46% two foramina, and 8% three foramina. Radicular grooves 83.3% were found in the lingual area and 16.2% towards the buccal area. CONCLUSIONS: The most prevalent anatomic presentation of the evaluated sample was a mandibular second molars with two roots, three root canals, and two apical foramina. Their variation was C-shaped root canals and Radix Paramolaris.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Tooth Root / Dental Pulp Cavity Limits: Female / Humans / Male Language: En Journal: BMC Oral Health Journal subject: ODONTOLOGIA Year: 2021 Document type: Article Affiliation country: Venezuela Country of publication: United kingdom

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Tooth Root / Dental Pulp Cavity Limits: Female / Humans / Male Language: En Journal: BMC Oral Health Journal subject: ODONTOLOGIA Year: 2021 Document type: Article Affiliation country: Venezuela Country of publication: United kingdom