MISC

2016年

Ipsilateral molar clenching induces less pain and discomfort than contralateral molar clenching in patients with unilateral anterior disc displacement of the temporomandibular joint

Journal of Oral and Facial Pain and Headache
  • Yohei Kumazaki
  • ,
  • Shigehisa Kawakami
  • ,
  • Atsutoshi Hirata
  • ,
  • Kazuhiro Oki
  • ,
  • Shogo Minagi

30
3
開始ページ
241
終了ページ
248
記述言語
英語
掲載種別
DOI
10.11607/ofph.1405
出版者・発行元
Quintessence Publishing Co. Inc.

Aims: To assess the influence of clenching side and location (ie, tooth) on the bite force necessary to induce pain or discomfort in patients with unilateral anterior disc displacement (ADD) of the temporomandibular joint (TMJ). Methods: A total of 17 patients with unilateral ADD diagnosed clinically and with magnetic resonance imaging were included. A bite force meter was positioned at each of four experimental positions: the mandibular first premolars and first molars, bilaterally. Subjects were instructed to clench on the bite force meter until they felt pain or discomfort in the orofacial area and to report the location of the pain. Differences in pain location (ADD side versus contralateral side) and in the bite force thresholds for eliciting pain or discomfort were assessed by means of the paired t test and Wilcoxon signed-rank test. Results: Only 18% of subjects (3 out of 17) reported pain in the TMJ with ADD during clenching at the ipsilateral molar, whereas 65% (11 out of 17) reported joint pain during clenching on the contralateral molar (P = .005). At the molars, the mean ± standard deviation bite force necessary to induce pain was 241.2 ± 135.5 N on the side with ADD and 160.9 ± 78.0 N on the contralateral side. The mean molar bite force necessary to induce pain on the side with ADD was significantly higher than that on the contralateral side (P = .002). Conclusion: Patients with unilateral ADD had fewer reports of TMJ pain and discomfort when they were molar clenching on the ipsilateral side compared to molar clenching on the contralateral side.

リンク情報
DOI
https://doi.org/10.11607/ofph.1405
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/27472527
ID情報
  • DOI : 10.11607/ofph.1405
  • ISSN : 2333-0376
  • ISSN : 2333-0384
  • PubMed ID : 27472527
  • SCOPUS ID : 84984879026

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