IADR Abstract Archives
Diaphragm Activity, Heart Rate And Oxygen Saturation During Tooth Grinding
Objectives: To compare the effect of canine guidance or group function on diaphragm activity, heart rate and oxygen saturation during awake tooth grinding at different body positions.
Methods: Fifty healthy male participants, 25 with canine guidance and 25 with group function were included. They had complete natural dentition, canine Class I or II and no history of orofacial pain. Bilateral electromyographic (EMG) recordings of diaphragm (DIA) muscle were performed during clenching in the maximum intercuspation (MIC) and during continuous tooth grinding from MIC to right lateral edge-to-edge contact position and vice versa, at standing, seated upright and right lateral decubitus positions. Activity during tooth grinding was normalized based on that recorded during MIC. Simultaneously, heart rate and oxygen saturation was measured with a fingertip pulse oximeter (Choicemmed®). The mean value of the three curves obtained for each condition was used for the statistical comparisons. EMG activity during awake tooth grinding, heart rate and oxygen saturation presented a non-normal distribution (p < 0.05; Shapiro-Wilk test), therefore a Mann-Whitney U-test was used to compare these variables between both groups. A value of p < 0.05 was considered significant.
Results: EMG activity of DIA muscle was similar in the working side as well as in the non-working side between participants with canine guidance or group function in the different body positions studied. The heart rate and the oxygen saturation showed no significant differences between both groups.
Conclusions: EMG activity of the DIA muscle, the heart rate and the oxygen saturation during tooth grinding are not significantly influenced by the type of the laterotrusive occlusal scheme.
Methods: Fifty healthy male participants, 25 with canine guidance and 25 with group function were included. They had complete natural dentition, canine Class I or II and no history of orofacial pain. Bilateral electromyographic (EMG) recordings of diaphragm (DIA) muscle were performed during clenching in the maximum intercuspation (MIC) and during continuous tooth grinding from MIC to right lateral edge-to-edge contact position and vice versa, at standing, seated upright and right lateral decubitus positions. Activity during tooth grinding was normalized based on that recorded during MIC. Simultaneously, heart rate and oxygen saturation was measured with a fingertip pulse oximeter (Choicemmed®). The mean value of the three curves obtained for each condition was used for the statistical comparisons. EMG activity during awake tooth grinding, heart rate and oxygen saturation presented a non-normal distribution (p < 0.05; Shapiro-Wilk test), therefore a Mann-Whitney U-test was used to compare these variables between both groups. A value of p < 0.05 was considered significant.
Results: EMG activity of DIA muscle was similar in the working side as well as in the non-working side between participants with canine guidance or group function in the different body positions studied. The heart rate and the oxygen saturation showed no significant differences between both groups.
Conclusions: EMG activity of the DIA muscle, the heart rate and the oxygen saturation during tooth grinding are not significantly influenced by the type of the laterotrusive occlusal scheme.