Rhythmical Jaw Opening – Closing Patterns in Subjects with TMD Pain An analysis of jaw motor behavior during a 5 minute observation period
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
A deeper understanding of jaw motor control is critical for clinical diagnosis and rehabilitation. Decreased jaw opening-closing amplitude and irregular frequency may be related to pain or dysfunction in the jaw system. This study observed how these parameters changed over a five minute rhythmical jaw opening-closing session among subjects with arthralgia and/or myalgia. Pre- and post-trial the subjects rated intensity of pain and sense of tiredness of the jaw on a numerical rating scale (NRS-11).
In this pilot study, seven female patients with arthralgia/myalgia were instructed to perform a rhythmical jaw opening-closing task during five minutes. The movement was recorded with a 3D optoelectronic recording system. The variables were i) mean jaw opening amplitudes (mm), ii) mean jaw opening-closing cycle times (s) and iii) self-reported intensity of pain and sense of tiredness pre- and post-task. The data was analyzed using Wilcoxon signed rank test for two related samples. P < 0.05 was considered statistically significant.
The results showed a significant decrease in amplitude and cycle time between the first and the second minute, during the remaining four minutes the parameters kept steady. The self-rated intensity of pain and sense of tiredness were significantly higher after the test than prior to it. There was no difference in standard deviation for amplitude or cycle time between the recordings.
It’s possible that the results are outcomes of the reported intensity of pain and sense of tiredness; additional research on the subject is needed to interpret the results to a bigger context.
Place, publisher, year, edition, pages
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:umu:diva-113645OAI: oai:DiVA.org:umu-113645DiVA: diva2:886281
Wänman, AndersÖsterlund, Catharina