Micro-CT assessment of internal morphology and root canal configuration of non C-shaped mandibular second molars

Wolf, Thomas Gerhard; Paqué, Frank; Betz, Patrick; Willershausen, Brita; Briseño-Marroquín, Benjamín (2017). Micro-CT assessment of internal morphology and root canal configuration of non C-shaped mandibular second molars. Swiss dental journal, 127(6), pp. 513-519. Schweizerische Zahnärzte-Gesellschaft SSO

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The root canal system morphology of the mandibular second molar was investigated by means of micro-computed tomography (μCT). The root canal configuration (RCC), foramina and accessory canals frequency of 93 mandibular second molars of an Egyptian sample were investigated by μCT scans. The RCC and main foramina number (MFN) are described by means of a four-digit system from coronal to apical. The most frequently observed RCCs in the mesial root were 2-2-1/1 (32.3%), 2-2-2/2 (28.0%), 1-1-1/1 (6.5%) and 2-1-1/1 (6.5%); an additional twelve different RCCs were also found here. In the distal root, the RCC 1-1-1/1 was observed in 81.7%; another ten different RCCs with a frequency of less than 5% were also observed in this root. Anastomoses be-tween the mesiobuccal and mesiolingual canals in the mesial root were witnessed in the coronal (20.5%), middle (19.4%) and apical (10.8%) thirds. Accessory canals were found in the coronal (mesiobuccal 15.0%, mesiolingual 12.9%, distobuccal 1.1%), middle (mesiobuccal 7.5%, mesiolingual 10.8%, distolingual 3.3%) and apical (mesiobuccal 19.3%, mesiolingual 16.2%, distolingual 10.8%, distobuccal 2.2%) thirds. The RCC of mandibular second molars showed a great variety. When compared with the first mandibular molar in a historical control from the same sample, the mandibular second molar presented less morphological diversifications. Yet, the mesial root canalsystem of the mandibular second molar showed more RCC variations, connecting and accessory canals than the distal root.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry

UniBE Contributor:

Wolf, Thomas Gerhard


600 Technology > 610 Medicine & health




Schweizerische Zahnärzte-Gesellschaft SSO




Hendrik Meyer-Lückel

Date Deposited:

30 Jul 2019 15:10

Last Modified:

24 Oct 2019 07:13

PubMed ID:


Uncontrolled Keywords:

Internal tooth morphology Mandibular second molar Micro-computed tomography Root canal configuration





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