Int J Stomatol

Inter J Stomatol ›› 2019, Vol. 46 ›› Issue (2): 209-212.doi: 10.7518/gjkq.2019002

• Original Articles • Previous Articles     Next Articles

Evaluating of the submandibular fossa by cone beam CT

Kun Cao,Jiafeng Li(),Yuhua Sun,Qiang Bao,Qiuning Lu,Wei Tang   

  1. Dept. of Oral and Maxillofacial Surgery, The Affiliated Hospital of Xuzhou Medical Uinversity, Xuzhou 221002, China
  • Received:2018-05-08 Revised:2018-12-03 Online:2019-03-01 Published:2019-03-15
  • Contact: Jiafeng Li E-mail:jiafengli203@163.com
  • Supported by:
    This study was supported by Natural Science Foundation of Jiangsu Province(BK20141141)

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Abstract:

Objective The aim of this study was to measure and evaluate the bone anatomy morphology of submandibular fossa by cone-beam CT (CBCT). Methods The CBCT images of 100 patients were retrospectively studied. The depth of the submandibular fossa, the adjacency of mandibular canal, and submandibular fossa were observed and measured. Results The deepest point of the submandibular fossa was lower than that of the upper edge of the mandibular canal. The average depth of submandibular fossa in the 1st molar region was (1.2±0.73) mm, and that in the 2nd molar region was (1.7±0.54) mm. The average distances from the deepest point of the submandibular fossa to the alveolar crest in the 1st molar were (17.2±2.16) mm and (13.1±2.71) mm (tooth missing), and those in the 2st molar were (15.3±2.43) mm and (9.6±2.56) mm (tooth missing). The horizontal distance from the depth of submandibular fossa to buccal bone wall in the 1st molar was (10.1±2.07) mm and that in the 2st molar was (11.3±1.53) mm. Conclusion CBCT clearly showed the relationship between the submandibular fossa and the mandibular canal.

Key words: submandibular fossa, mandibular canal, cone beam CT, dental implants

CLC Number: 

  • R78

TrendMD: 

Fig 1

Schematic diagram of measurement of submandibular fossa"

Fig 2

Schematic diagram of measurement of mandibular canal"

Tab 1

Submandibular fossa measurements mm"

区域 D L1 L2
有牙 无牙
第一磨牙区 1.2±0.73 17.2±2.16 13.1±2.71 10.1±2.07
第二磨牙区 1.7±0.54 15.3±2.43 9.6±2.56 11.3±1.53

Tab 2

Mandibular canal measurements"

区域 是否有牙 H1/mm H2/mm H3/mm H2/H3
第一磨牙区 有 16.3±1.98 6.1±1.22 2.7±1.29 2.3
无 12.4±2.37 5.9±1.61 2.1±1.58 2.8
第二磨牙区 有 13.9±2.33 7.2±0.97 2.6±1.14 2.8
无 9.2±2.14 7.1±1.36 2.0±1.75 3.6
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