Electromyographic activity of the jaw-closing muscles in patients with osseointegrated implant fixed partial dentures

Randall C. Duncan, Arthur T. Storey, John D. Rugh, Stephen M. Parel

Research output: Contribution to journalArticle

9 Scopus citations


The control of postural and synergistic jaw reflexes involves interrelated sensory input from receptors in the jaw muscles, temporomandibular joint, periodontal ligament, and mucosa. This investigation was done to determine whether a decrease in intraoral sensory afferent discharge significantly altered the onset of the jaw-unloading reflex. The subject population consisted of three groups with 10 subjects in each group. Group 1 had maxillary and mandibular natural teeth and group 2 consisted of edentulous subjects with complete dentures. Group 3 consisted of edentulous subjects with maxillary complete dentures and mandibular complete implant-supported prostheses. The unloading reflex was initiated with a muscleunloading device and recorded with a storage oscilloscope. A one-way analysis of variance found no significant differences in the unloading-reflex latency for the masseter or temporal muscles among the three experimental groups (p < 0.05).

Original languageEnglish (US)
Pages (from-to)544-549
Number of pages6
JournalThe Journal of Prosthetic Dentistry
Issue number4
StatePublished - Apr 1992


ASJC Scopus subject areas

  • Oral Surgery

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