Effect of laterotrusive occlusal scheme on chewing duration, external intercostal muscular activity, heart rate, and oxygen saturation

ABSTRACT

Objective: To evaluate the effect of the laterotrusive occlusal scheme on chewing duration, external intercostal (EIC) electromyographic (EMG) activity, heart rate (HR), and oxygen saturation (OS) during different tasks in the upright seated position.

Methods: Fifty young participants, 25 with canine guidance and 25 with group function, were included. Chewing duration, bilateral EIC EMG activity, HR, and OS were recorded during the following tasks: 1) chewing until swallowing threshold; 2) laterotrusive teeth grinding.

Results: Chewing duration, bilateral EIC EMG activity, HR, and OS showed no significant differences between the two laterotrusive occlusal schemes during the tasks studied.

Conclusion: These results suggest that chewing duration, EIC muscle activity, HR, and OS were not significantly influenced by the laterotrusive occlusal scheme. Therefore, when a modification of the laterotrusive occlusal scheme is needed during oral rehabilitation or orthodontic treatment, canine guidance or group function should not significantly change EMG activity of EIC muscles.

KEYWORDS:

• Canine guidance
• group function
• chewing
• teeth grinding
• heart rate
• oxygen
• saturation
• electromyography

Acknowledgments

Thanks to Mr. Juan Fernández, from the Language and Translation services of the Faculty of Dentistry, for kindly proofreading and checking the spelling and grammar of this paper.

Contributors

R.M., S.V., C.M., N.A.G., A.D.F., and H.S., contributed to conception, design, data acquisition, analysis and interpretation, drafted and critically revised the manuscript; M.F.G., C.Z., and R.B., contributed to design and data interpretation, drafted and critically revised the manuscript. All authors gave final approval and agreed to be accountable for all aspects of the work.

Disclosure statement

No potential conflict of interest was reported by the authors.

Ethics approval

Protocols based on ethical principles that have their origin in the Declaration of Helsinki were used (18/006).

Additional information

Funding

No funding was received.