Journal of oral rehabilitation · 2025
Thermographic Behaviour of the Orbicularis Oris Muscle Under Different Provocative Tests.
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Salles Patrícia Vieira, Valentim Amanda Freitas, Caldeira Maria Luiza Neves, Haddad Denise Sabbagh, Furlan Renata Maria Moreira Moraes, Motta Andréa Rodrigues
Аннотация
BACKGROUND: Infrared thermography is an objective method for investigating muscle functioning, enabling inferences about physiology and therapeutics. This noninvasive and non-ionising imaging diagnostic method allows real-time visualisation of the vascular and musculoskeletal systems through skin microcirculation dynamics. It transforms information about the human body's thermal radiation, captured via infrared radiation, into an analysable image.
OBJECTIVE: To describe the thermographic behaviour of the orbicularis oris muscle during sustained contraction and chewing tasks.
METHODS: The study included 56 healthy women aged 18-52 years, who underwent thermographic evaluations before, during, and after performing sustained contraction and chewing tasks. The orbicularis oris muscle was analysed qualitatively and quantitatively using anatomical thermal areas and Student's t-test to compare mean temperature data.
RESULTS: Qualitative analysis revealed temperature changes during the provocative tasks. A comparison of mean temperatures showed a significant temperature increase, corroborating the qualitative findings. The mean temperature variation per task was as follows: 0.57°C during lip compression, 0.20°C during lip protrusion, 0.57°C while chewing peanuts, 0.43°C while chewing crackers, and 0.37°C while chewing a bread roll. There was a decrease in mean temperature during the intervals between tasks, though insufficient to return to baseline levels, indicating a cumulative temperature effect between tasks.
CONCLUSION: The orbicularis oris muscle temperature increased during the provocative tasks. The 2-min interval between tasks was insufficient for the resting temperature to return to baseline levels. These findings confirm that thermography is an effective method for identifying such temperature changes.
OBJECTIVE: To describe the thermographic behaviour of the orbicularis oris muscle during sustained contraction and chewing tasks.
METHODS: The study included 56 healthy women aged 18-52 years, who underwent thermographic evaluations before, during, and after performing sustained contraction and chewing tasks. The orbicularis oris muscle was analysed qualitatively and quantitatively using anatomical thermal areas and Student's t-test to compare mean temperature data.
RESULTS: Qualitative analysis revealed temperature changes during the provocative tasks. A comparison of mean temperatures showed a significant temperature increase, corroborating the qualitative findings. The mean temperature variation per task was as follows: 0.57°C during lip compression, 0.20°C during lip protrusion, 0.57°C while chewing peanuts, 0.43°C while chewing crackers, and 0.37°C while chewing a bread roll. There was a decrease in mean temperature during the intervals between tasks, though insufficient to return to baseline levels, indicating a cumulative temperature effect between tasks.
CONCLUSION: The orbicularis oris muscle temperature increased during the provocative tasks. The 2-min interval between tasks was insufficient for the resting temperature to return to baseline levels. These findings confirm that thermography is an effective method for identifying such temperature changes.