Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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Can pterygoid plate asymmetry be linked to temporomandibular joint disorders?

  • Guerrero, Maria Eugenia (OIC, OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven) ;
  • Beltran, Jorge (Oral and Maxillofacial Radiology, Post-Graduate School, Universidad Privada Cayetano Heredia) ;
  • de Laat, Antoon (Stomatology and Maxillofacial Surgery, Department of Oral Health Sciences, KU Leuven) ;
  • Jacobs, Reinhilde (OIC, OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven)
  • Received : 2015.06.01
  • Accepted : 2015.04.01
  • Published : 2015.06.30
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Abstract

Purpose: This study was performed to evaluate the relationship between pterygoid plate asymmetry and temporomandibular joint disorders. Materials and Methods: Cone-beam computed tomography (CBCT) images of 60 patients with temporomandibular disorders (TMD) involving pain were analyzed and compared with images of 60 age-and gender-matched controls. Three observers performed linear measurements of the lateral pterygoid plates. Results: Statistically significant differences were found between measurements of the lateral pterygoid plates on the site that had pain and the contralateral site (p<0.05). The average length of the lateral pterygoid plates (LPPs) in patients with TMD was $17.01{\pm}3.64mm$ on the right side and $16.21{\pm}3.51mm$ on the left side, and in patients without TMD, it was $11.86{\pm}1.97mm$ on the right side and $11.98{\pm}1.85mm$ on the left side. Statistically significant differences in the LPP length, measured on CBCT, were found between patients with and without TMD (p<0.05). The inter-examiner reliability obtained in this study was very high for all the examiners (0.99, 95% confidence interval: 0.98-0.99). Conclusion: Within the limits of the present study, CBCT lateral pterygoid plate measurements at the side with TMD were found to be significantly different from those on the side without TMD. More research is needed to explore potential etiological correlations and implications for treatment.

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