Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (6): 117-121.doi: 10.6040/j.issn.1671-7554.0.2020.1573

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Relationship among the volume and surface area of the temporomandibular joint condyle and the sagittal position of disc in young adults

LIU Xueye1, LI Qiming2, TANG Hongyi1, XU Qiuping1, CHEN Wenqian1, GUO Jing1   

  1. 1. Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University &
    Shandong Key Laboratory of Oral Tissue Regeneration &
    Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan 250012, Shandong, China;
    2. Department of Orthodontics, Ningbo Stomatological Hospital, Ningbo 315010, Zhejiang, China
  • Published:2021-06-10

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Abstract: Objective To explore the relationship among the sagittal position of disc and the volume, surface area and morphometric index(MI)of bilateral temporomandibular joint(TMJ)condyle in young adults. Methods During Jan. 2019 and Dec. 2020, patients who came for cone beam computed tomography(CBCT)at the Department of Orthodontics, Stomatological Hospital of Shandong University were invited to participate in the study. After informed consent, the subjects agreed to receive MRI of bilateral TMJ. A total of 44 subjects were enrolled, including 20 males and 24 females, aged 18 to 30(mean 24.5±3.3)years. The CBCT data were imported into Mimics 20.0 to reconstruct the condyle. Mimics 20.0 automatically calculated the volume and surface area. MI equaled to volume / surface area. The sagittal position of disc was quantitatively evaluated with MRI. According to the degree of bilateral disc displacement, the data of condylar volume, surface area and MI on the side with more anterior sagittal displacement were divided into G1 and the data on the other side were divided into G2. Results There were significant differences in the volume, surface area and MI between bilateral condyles(P<0.001), but there were no significant differences between the male and female(P>0.05). The condylar volume and surface area were negatively correlated with the angle representing the sagittal position of TMJ disc(P=0.026; P=0.037). The mean values of condylar volume, surface area and MI in G2 were significantly higher than those in G1(P<0.001; P=0.004; P=0.014). Conclusion There were differences in volume and surface area between bilateral condyles, but no difference between the male and female. The volume and surface area of condyle were negatively correlated with sagittal displacement of TMJ disc in young adults.

Key words: Temporomandibular joint, Condyle, Disc displacement, Cone beam computed tomography, Magnetic resonance imaging

CLC Number: 

  • R728.26
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