Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (8): 74-79.doi: 10.6040/j.issn.1671-7554.0.2021.0269

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Morphological observation of the CBCT image about the furcation groove and root canal of 800 maxillary first premolars

YIN Zengzheng1,2,3, NIE Xiaokun4, WANG Yu1,2,3, MA Zhide1,2,3, XIONG Shijiang1,2,3   

  1. 1. Department of VIP, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China;
    2. Shandong Key Laboratory of Oral Tissue Regeneration, Jinan 250012, Shandong, China;
    3. Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan 250012, Shandong, China;
    4. The First Department of Cariology and Endodontics, Jinan Stomatology Hospital, Jinan 250001, Shandong, China
  • Published:2021-09-16

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Abstract: Objective To investigate the number of roots, root canal types, incidence of furcation groove and morphological characteristics of the maxillary first premolars, so as to provide theoretical basis for the clinical diagnosis and treatment. Methods CBCT images of 800 maxillary first premolars from 400 patients treated at Shandong University Stomatological Hospital were observed. Based on the Vertucci classification, the morphology of the root and root canal were determined, and a morphological study on the maxillary first premolars with furcation groove was conducted. Results The most common root type of maxillary first premolars was 1 root(62.6%), followed by 2 roots(36.1%), and 3 roots(1.3%). The most common root canal type was type Ⅳ(44.0%), followed by type Ⅱ, type Ⅰ and type Ⅲ. The furcation groove was observed in 61.6% of the double-rooted maxillary first premolars, the average depth of the groove was 0.60 mm, the average length was 3.25 mm, and the average value of the minimum thickness of the corresponding palatal sidewall was 0.59 mm. Conclusion The shape of the root and root canal of the maxillary first premolar is complex, and the presence of the furcation groove further increases the difficulty of root canal treatment. Observing the morphology of root, root canal and furcation groove of the maxillary first premolars can help dentists understand the anatomical characteristics and improve the success rate of root canal treatment.

Key words: Maxillary first premolar, Furcation groove, Cone-beam computed tomography, Root canal morphology, Incidence

CLC Number: 

  • R781
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