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Natural course of severe temporomandibular joint osteoarthrosis evaluated by a novel condylar remodelling scoring system and quantitative volumetric analysis

  • Author Footnotes
    1 Chong-Ke Sun and Yu-Bing Li are co-first authors.
    C.-K. Sun
    Footnotes
    1 Chong-Ke Sun and Yu-Bing Li are co-first authors.
    Affiliations
    Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China

    National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, PR China
    Search for articles by this author
  • Author Footnotes
    1 Chong-Ke Sun and Yu-Bing Li are co-first authors.
    Y.-B. Li
    Footnotes
    1 Chong-Ke Sun and Yu-Bing Li are co-first authors.
    Affiliations
    Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China

    National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, PR China
    Search for articles by this author
  • H.-S. Ma
    Affiliations
    Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China

    National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, PR China
    Search for articles by this author
  • G. Li
    Affiliations
    Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China

    National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, PR China
    Search for articles by this author
  • Z.-P. Sun
    Correspondence
    Correspondence to: Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China.
    Affiliations
    Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China

    National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, PR China
    Search for articles by this author
  • L.-S. Sun
    Affiliations
    National Engineering Laboratory for Digital and Material Technology of Stomatology and Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, PR China

    Key Laboratory of Oral Pathology, School and Hospital of Stomatology, Peking University, Haidian District, Beijing, PR China
    Search for articles by this author
  • Author Footnotes
    1 Chong-Ke Sun and Yu-Bing Li are co-first authors.
Published:August 13, 2022DOI:https://doi.org/10.1016/j.ijom.2022.08.001

      Abstract

      Temporomandibular joint osteoarthrosis (TMJ-OA) frequently causes mild, moderate, or severe condylar morphological changes. A novel condylar remodelling scoring system (CRSS) based on three-dimensional cone beam computed tomography images is proposed, which is used to grade condylar morphological changes. In the CRSS, the condyle is divided into 10 regions by 11 reference points. For each increase in the number of regions involved in TMJ-OA, one point is subtracted from the full score of 10. The intra-class correlation coefficients for intra- and inter-observer agreement (range 0.656–0.898 and 0.841–0.906, respectively) indicated that the CRSS had good reliability. Cephalometric analysis showed that the condyles with severe morphological changes were prone to present with a retrognathic and clockwise rotating mandible, shorter ramus height, reduced mandibular length, larger mandibular angle, and maxillary retrusion. Qualitative CRSS evaluation and quantitative volumetric analysis were performed to evaluate the stability of severe TMJ-OA in its natural course (343 condyles). The continuous cortex group showed no remarkable changes with an average follow-up of 2 years. In the discontinuous cortex group, most (74.4%) converted into a continuous cortex during follow-up (mean 2 years).

      Keywords

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