Naslov
Electromyographic evaluation of human masticatory muscles' activity in normal young people and in subjects with temporomandibular dysfunction (TMD)

Autori
Alajbeg Ž., Iva ; Valentić-Peruzović, Melita ; Alajbeg, Ivan ; Illeš, Davor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Collegium Antropologicum / Maver, H. ; Rudan, P. - Zagreb, 2002, 3-3

Skup
13th Congress of the European Anthropological Association

Mjesto i datum
Zagreb, Hrvatska, 30.08.2002. - 03.09.2002

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
electromyography; TMD; mandibular positions

Sažetak
The aim of the present study was to evaluate the masticatory muscles' activity during different functional mandibular positions in patients with TMD and to compare it with healthy subjects. In this study 27 control group and 13 TMD patients were investigated. Surface EMG recordings were obtained from left and right anterior temporal, masseter and digastric muscles. Data were recorded during standardized jaw positions that included clenching in the position of maximal intercuspation of teeth, lateral positions, maximal lateral positions, protrusion and maximal protrusion. The relative contribution of muscles was compared by means of the activity index (IAc). Considering the temporal masseter IAc, the anterior temporal muscle prevalence was obvious in both groups during clenching in the position of maximal intercuspation of teeth. The masseter muscle prevalence was seen in 42% of subjects in asymptomatic group, and in 44% of subjects in symptomatic group, with significantly higher mean values in the group of patients with TMD (p<0, 05). In lateral eccentric positions 63% of healthy subjects maintain jaw position by using more temporal than masseter muscle, while in symptomatic group only about 50% of people show temporal muscle prevalence also in lateral eccentric positions. Considering the temporal digastric IAc, the temporal muscle prevalence in right lateral position was obvious in more than 80% of asymptomatic subjects, and only in 53% of symptomatic subjects. In left lateral position, the digastric muscle prevalence was seen in 26% of asymptomatic subjects and in 31% of symptomatic subjects, with significantly higher mean values in the group of TMD patients (p<0, 05). This investigation points out that changes in EMG activity pattern could indicate the possible functional alteration in patients with TMD.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

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