Influence of group function and canine guidance on electromyographic activity of elevator muscles

Arturo Manns*, Clifford Chan, Rodolfo Miralles

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

94 Scopus citations


A comparative EMG study was done between two types of occlusal guidances: group function and canine guidance. The purpose was to determine which of the two occlusal schemes causes a greater reduction in muscle activity and thereby a decrease in muscle tension in eccentric mandibular positions. Full-coverage occlusal splints were made for six test subjects with normal function of the stomatognathic system. Left- and right-side integrated EMG recordings were made of the masseter and temporal muscles during static (clenching) and dynamic (lateral excursion and clenching) maximal contractions. The results showed an EMG activity reduction of the elevator muscles with group function relative to their activity in centric occlusion. A more marked reduction was observed on the mediotrusive side, mainly in the temporal muscle. With canine guidance, the reduction in elevator muscle activity is much greater, more significant, and mainly in the temporal muscle of the mediotrusive side. The clinical implications of this study suggest the use of canine guidance in laterotrusion for therapy with full-coverage occlusal splints.

Original languageEnglish
Pages (from-to)494-501
Number of pages8
JournalThe Journal of Prosthetic Dentistry
Issue number4
StatePublished - Apr 1987
Externally publishedYes

Bibliographical note

Funding Information:
Supported by thr Alexander van Humboldt Foundation and Universi-tat Tiibingen. *:\ssociate Professor and Chief, Oral Physiology Laboratory, Depart-ment of Physiology and Biophysics. **Assistant, Department of Prosthodontics II. ***.\ssistant Professor, Department of Physisology and Biophysics.


  • Adolescent
  • Adult
  • Cuspid
  • Dental Occlusion
  • Electromyography
  • Female
  • Human
  • Male
  • Masseter Muscle
  • Masticatory Muscles
  • Muscle Contraction
  • Support, Non-U.S. Gov't;
  • Temporal Muscle


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