Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 241-248 |
| Number of pages | 8 |
| Journal | Journal of oral & facial pain and headache |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2016 |
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Keywords
- Anterior disc displacement
- Bite force
- Preferred chewing side
- Temporomandibular disorders
- Temporomandibular joint
ASJC Scopus subject areas
- Anesthesiology and Pain Medicine
- Clinical Neurology
- Dentistry (miscellaneous)
Cite this
Ipsilateral molar clenching induces less pain and discomfort than contralateral molar clenching in patients with unilateral anterior disc displacement of the temporomandibular joint. / Kumazaki, Yohei; Kawakami, Shigehisa; Hirata, Atsutoshi; Oki, Kazuhiro; Minagi, Shougo.
In: Journal of oral & facial pain and headache, Vol. 30, No. 3, 2016, p. 241-248.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ipsilateral molar clenching induces less pain and discomfort than contralateral molar clenching in patients with unilateral anterior disc displacement of the temporomandibular joint
AU - Kumazaki, Yohei
AU - Kawakami, Shigehisa
AU - Hirata, Atsutoshi
AU - Oki, Kazuhiro
AU - Minagi, Shougo
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - Anterior disc displacement
KW - Bite force
KW - Preferred chewing side
KW - Temporomandibular disorders
KW - Temporomandibular joint
UR - http://www.scopus.com/inward/record.url?scp=84984879026&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84984879026&partnerID=8YFLogxK
U2 - 10.11607/ofph.1405
DO - 10.11607/ofph.1405
M3 - Article
VL - 30
SP - 241
EP - 248
JO - Journal of Oral and Facial Pain and Headache
JF - Journal of Oral and Facial Pain and Headache
SN - 2333-0384
IS - 3
ER -