Biomaterial Database

Jaw muscle silent periods before and after rapid palatal expansion. 1979

A J Felli, and W D McCall

1. The electromyographic silent period was observed in jaw-closing muscles during a maximal clench following a tap to the mandibular symphysis in eight subjects before and after rapid palatal expansion. 2. No differences in mean silent period duration were observed among the three jaw-closing muscles examined. 3. A large (r = 0.96) and statistically significant (p less than 0.01) correlation coefficient between two sets of silent period durations at one session indicates that these measurements are repeatable and reliable. 4. The mean silent period duration for the eight patients with malocclusions was 33.5 msec. prior to rapid palatal expansion and 51.2 msec. after the completion of palatal expansion. The difference was statistically significant (p less than 0.01) and represents a 61 percent increase. 5. Patients with symptoms of TMJ dysfunction are not the only group showing a prolonged silent period duration.

UI	MeSH Term	Description	Entries
D008406	Masseter Muscle	A masticatory muscle whose action is closing the jaws.	Masseter Muscles,Muscle, Masseter,Muscles, Masseter
D008410	Masticatory Muscles	Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)	Masticatory Muscle,Muscle, Masticatory,Muscles, Masticatory
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D010155	Palatal Expansion Technique	An orthodontic method used for correcting narrow or collapsed maxillary arches and functional cross-bite. (From Jablonski's Dictionary of Dentistry),	Maxillary Expansion,Palatal Expansion Technic,Expansion, Maxillary,Palatal Expansion Technics,Palatal Expansion Techniques,Technic, Palatal Expansion,Technique, Palatal Expansion
D012018	Reflex	An involuntary movement or exercise of function in a part, excited in response to a stimulus applied to the periphery and transmitted to the brain or spinal cord.
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D003766	Dental Occlusion	The relationship of all the components of the masticatory system in normal function. It has special reference to the position and contact of the maxillary and mandibular teeth for the highest efficiency during the excursive movements of the jaw that are essential for mastication. (From Jablonski, Dictionary of Dentistry, 1992, p556, p472)	Canine Guidance,Occlusal Guidance,Occlusal Plane,Occlusion, Dental,Dental Occlusions,Guidance, Canine,Guidance, Occlusal,Occlusal Guidances,Occlusal Planes,Occlusions, Dental,Plane, Occlusal,Planes, Occlusal
D004576	Electromyography	Recording of the changes in electric potential of muscle by means of surface or needle electrodes.	Electromyogram,Surface Electromyography,Electromyograms,Electromyographies,Electromyographies, Surface,Electromyography, Surface,Surface Electromyographies
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

Related Publications

A J Felli, and W D McCall

Assessment of respiratory muscle strength and airflow before and after microimplant-assisted rapid palatal expansion.

September 2019, The Angle orthodontist,

A J Felli, and W D McCall

Jaw muscle silent periods: the effect of acrylic splints.

April 1980, Journal of dental research,

A J Felli, and W D McCall

Jaw muscle silent periods by tooth tap and chin tap.

January 1981, Journal of oral rehabilitation,

A J Felli, and W D McCall

Pulp vitality after rapid palatal expansion.

February 2010, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics,

A J Felli, and W D McCall

Masticatory muscle silent periods in patients with MPD syndrome before and after treatment.

March 1981, Journal of dental research,

A J Felli, and W D McCall

[Surgically assisted rapid palatal expansion using corticotomy of the upper jaw].

January 1991, Mondo ortodontico,

A J Felli, and W D McCall

[Rapid palatal expansion of the upper jaw. 2. Therapy and clinical cases].

May 1987, Attualita dentale,

A J Felli, and W D McCall

[Rapid palatal expansion].

April 1991, Revista de la Facultad de Odontologia Universidad de Antioquia,