Rhythmical Jaw Opening-Closing Patterns in Healthy Individuals
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Pain affects movements, hampers normal function and may induce dysfunction in jaw system. The aim of this study was to examine if the pattern and stability of a rhythmical jaw opening- closing task changed during a five minute session, in healthy individuals. The analyses included nine men and nine women (mean age 26.7 years; SD 5.3). The participants were instructed to perform rhythmical jaw opening-closing movements with a pace of one per second and amplitude of approximately 20 mm during a five minutes period. The jaw movements were recorded with a 3D optoelectronic recording system. The parameters’ analyses were jaw opening-closing amplitudes and cycle times, to analyze if these parameters differed between men and women and to evaluate if the task evoked tiredness or pain in the jaws. The ten first jaw opening-closing amplitudes and cycle times at each sequence were analysed and compared within individuals and between the groups. Non-parametrical statistics were used. A P-value <0.05 was considered statistically significant. The results showed for both men and women a significant decrease in amplitude and cycle time between the first and the other sequences. The results showed for both men and women that the rhythmical jaw opening-closing task induces self-reported tiredness in the jaws. In conclusion, individuals seem to adhere to pace by reducing amplitude and cycle time during continuous jaw opening-closing tasks. When used as exercise for rehabilitation of the jaw function both patients and dentists should be aware of this behavior.
Place, publisher, year, edition, pages
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:umu:diva-113643OAI: oai:DiVA.org:umu-113643DiVA: diva2:886272
Wänman, AndersÖsterlund, Catharina