Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery
Objective: The aim of this study is to investigate short-term changes in the electromyographic (EMG) activity of masticatory muscles in individuals with skeletal Class III malocclusion undergo double-jaw orthognathic surgery. Material and methods: In patients with skeletal Class III anomaly, EMG...
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Medical Journals Sweden
2025-04-01
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| Series: | Acta Odontologica Scandinavica |
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| Online Access: | https://medicaljournalssweden.se/actaodontologica/article/view/43408 |
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| author | Ali Kağan Özen İsmail Ceylan |
| author_facet | Ali Kağan Özen İsmail Ceylan |
| author_sort | Ali Kağan Özen |
| collection | DOAJ |
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Objective: The aim of this study is to investigate short-term changes in the electromyographic (EMG) activity of masticatory muscles in individuals with skeletal Class III malocclusion undergo double-jaw orthognathic surgery.
Material and methods: In patients with skeletal Class III anomaly, EMG activity changes in the anterior temporalis and masseter muscles were measured before T0 and at 3 (T1) and 6 (T2) months after bimaxillary orthognathic surgery. Recordings were obtained using the ‘MP100’ device and circular Ag-AgCl electrodes during closure, clenching, chewing and swallowing. Data from 26 individuals (12 males, 14 females) with a mean age of 21.7 years were analysed using the Friedman test.
Results: A significant decrease was observed in the right/left masseter muscles during clenching/chewing from T1 to T0 (right and left masseter clenching: p < 0.001, left masseter chewing: p < 0.01, right masseter chewing: p < 0.05), while a significant increase was noted in the right masseter’s clenching function from T2 to T1 (p < 0.01). The EMG activity of the right anterior temporal muscle decreased during clenching at T1–T0 (p < 0.001), increased at T2–T1 (p < 0.05), and decreased during chewing/swallowing at T1–T0 (chewing: p < 0.001, swallowing: p < 0.05) and T2–T0 (p < 0.05). The left anterior temporal muscle showed decreased EMG activity during clenching at T1–T0 (p < 0.001), increased at T2–T1 (p < 0.05), and decreased during chewing at T1–T0 (p < 0.001). During swallowing, a decrease was observed at T2–T0 (p < 0.001).
Conclusions: Partial changes in EMG activity were observed during some functions in the 3-month period; however, no significant overall change was recorded in the 6-month period.
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| format | Article |
| id | doaj-art-aadf840fd50d4e49aef753dbc5a3061b |
| institution | OA Journals |
| issn | 0001-6357 1502-3850 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Medical Journals Sweden |
| record_format | Article |
| series | Acta Odontologica Scandinavica |
| spelling | doaj-art-aadf840fd50d4e49aef753dbc5a3061b2025-08-20T02:12:20ZengMedical Journals SwedenActa Odontologica Scandinavica0001-63571502-38502025-04-018410.2340/aos.v84.43408Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgeryAli Kağan Özen 0https://orcid.org/0000-0002-8729-0914İsmail Ceylan 1https://orcid.org/0000-0002-8693-4175Department of Orthodontics, Kafkas University Faculty of Dentistry, Kars, TürkiyeDepartment of Orthodontics, Atatürk University Faculty of Dentistry, Erzurum, Türkiye Objective: The aim of this study is to investigate short-term changes in the electromyographic (EMG) activity of masticatory muscles in individuals with skeletal Class III malocclusion undergo double-jaw orthognathic surgery. Material and methods: In patients with skeletal Class III anomaly, EMG activity changes in the anterior temporalis and masseter muscles were measured before T0 and at 3 (T1) and 6 (T2) months after bimaxillary orthognathic surgery. Recordings were obtained using the ‘MP100’ device and circular Ag-AgCl electrodes during closure, clenching, chewing and swallowing. Data from 26 individuals (12 males, 14 females) with a mean age of 21.7 years were analysed using the Friedman test. Results: A significant decrease was observed in the right/left masseter muscles during clenching/chewing from T1 to T0 (right and left masseter clenching: p < 0.001, left masseter chewing: p < 0.01, right masseter chewing: p < 0.05), while a significant increase was noted in the right masseter’s clenching function from T2 to T1 (p < 0.01). The EMG activity of the right anterior temporal muscle decreased during clenching at T1–T0 (p < 0.001), increased at T2–T1 (p < 0.05), and decreased during chewing/swallowing at T1–T0 (chewing: p < 0.001, swallowing: p < 0.05) and T2–T0 (p < 0.05). The left anterior temporal muscle showed decreased EMG activity during clenching at T1–T0 (p < 0.001), increased at T2–T1 (p < 0.05), and decreased during chewing at T1–T0 (p < 0.001). During swallowing, a decrease was observed at T2–T0 (p < 0.001). Conclusions: Partial changes in EMG activity were observed during some functions in the 3-month period; however, no significant overall change was recorded in the 6-month period. https://medicaljournalssweden.se/actaodontologica/article/view/43408Masticatory muscleselectromyographyorthognathic surgerymuscle contraction |
| spellingShingle | Ali Kağan Özen İsmail Ceylan Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery Acta Odontologica Scandinavica Masticatory muscles electromyography orthognathic surgery muscle contraction |
| title | Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery |
| title_full | Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery |
| title_fullStr | Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery |
| title_full_unstemmed | Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery |
| title_short | Changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery |
| title_sort | changes in the electromyographic activity of masticatory muscles in patients undergoing bimaxillary surgery |
| topic | Masticatory muscles electromyography orthognathic surgery muscle contraction |
| url | https://medicaljournalssweden.se/actaodontologica/article/view/43408 |
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