Journal of Oral Medicine and Pain

Korean Academy of Orofacial Pain and Oral Medicine (대한안면통증구강내과학회)
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Importance of Relative Comparison of Capsular Widths on the Affected and Non-Affected Sides of Temporomandibular Joint Arthralgia Patients: An Ultrasonography Study

  • Hee-Won Kim (Department of Oral Medicine, Pusan National University Dental Hospital, Dental Research Institute) ;
  • Yong-Woo Ahn (Department of Oral Medicine, Pusan National University Dental Hospital, Dental Research Institute) ;
  • Sung-Hee Jeong (Department of Oral Medicine, Pusan National University Dental Hospital, Dental Research Institute) ;
  • Soo-Min Ok (Department of Oral Medicine, Pusan National University Dental Hospital, Dental Research Institute) ;
  • Hye-Mi Jeon (Dental Clinic Center, Pusan National University Hospital) ;
  • Hye-Min Ju (Department of Oral Medicine, Pusan National University Dental Hospital, Dental Research Institute)
  • Received : 2023.08.28
  • Accepted : 2023.09.10
  • Published : 2023.09.30
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Abstract

Purpose: In this study, we evaluate the potential of the relative ratio of capsular width (RCW) between the affected side (Aff) and non-affected side (Non-aff) in patients with temporomandibular joint (TMJ) arthralgia. We assessed whether RCW may hold greater diagnostic significance than the objective capsular width (CW) reported in previous studies when diagnosing arthralgia using ultrasonography (US). Methods: Forty-nine patients were assessed using US, excluding four patients with bilateral arthralgia. The patients were divided into two groups: 40 with unilateral arthralgia (UA), and nine without arthralgia (NA). We measured CW and masseter muscle thickness using US. Moreover, we employed RCW to analyze the variances between the groups. The numerical rating scale (NRS) and RCW were compared before and after dexamethasone injection in 10 patients who underwent follow-up evaluations. Results: Within the UA group, CW on the Aff was found to be significantly larger compared to the Non-aff (p<0.001). Additionally, RCW in the UA group was greater than that in the NA group (p<0.01). Furthermore, after dexamethasone injection, a reduction in the NRS and RCW values was observed in the 10 patients who were followed up. Conclusions: While previous studies have suggested a link between arthralgia and TMJ effusion, making CW a possible indirect diagnostic indicator for arthralgia, our findings propose that RCW could hold more diagnostic value than objective CW. However, additional studies are required to standardize the protocols for interpreting US results and determining the cutoff value of RCW in diagnosing TMJ arthralgia.

Keywords

Acknowledgement

This work was supported by Pusan National University Research Grant, 2022.

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