{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T00:31:15Z","timestamp":1767832275641,"version":"3.49.0"},"reference-count":47,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T00:00:00Z","timestamp":1669939200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100002873","name":"Chulalongkorn University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002873","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Oral Rehabilitation"],"published-print":{"date-parts":[[2023,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Bilateral Class II intermaxillary elastics (CII elastics) are commonly used in orthodontics; however, the effects of CII elastics on masticatory muscle activity and the occlusal contact area have not been studied.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To evaluate the short\u2010term effects of CII elastics on masticatory muscle activity balance, occlusal contact area and masticatory performance in a group of adult orthodontic patients after 3\u2009months.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Forty\u2010three patients with a &lt;3\u2009mm Class II molar relationship receiving ongoing treatment with fixed appliances were recruited. The experimental group (<jats:italic>n<\/jats:italic>\u00a0=\u00a021) wore CII elastics (100\u2013150\u2009g\/side) full time; the control group (<jats:italic>n<\/jats:italic>\u00a0=\u00a022) did not wear CII elastics. Surface electromyography, the areas of occlusal contact and near contact (ACNC) and the median particle size of a test food were assessed prior to (T0) and after one (T1) and 3\u2009months (T2). Within\u2010 and between\u2010group differences were analysed and the relationships between changes in dependent variables were examined (<jats:italic>\u03b1<\/jats:italic>\u00a0=\u00a00.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>At T2, the experimental group showed better masticatory muscle activity balance (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.001) and masticatory performance (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05) than controls. Both masticatory muscle activity balance (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.001) and masticatory performance (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.001) significantly improved in the experimental group between T0 and T2. The changes in masticatory muscle activity balance and masticatory performance were significantly related (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05). No significant changes in cumulative ACNC or ACNC balance were observed (<jats:italic>p<\/jats:italic>\u2009&gt;\u2009.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>After 3\u2009months, CII elastics improved masticatory muscle activity balance, which led to better masticatory performance.<\/jats:p><\/jats:sec>","DOI":"10.1111\/joor.13395","type":"journal-article","created":{"date-parts":[[2022,11,27]],"date-time":"2022-11-27T20:10:22Z","timestamp":1669579822000},"page":"131-139","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Effects of class <scp>II<\/scp> intermaxillary elastics on masticatory muscle activity balance, occlusal contact area and masticatory performance: A multicenter randomised controlled trial"],"prefix":"10.1111","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9720-3044","authenticated-orcid":false,"given":"Napat","family":"Nalamliang","sequence":"first","affiliation":[{"name":"Department of Occlusion, Faculty of Dentistry Chulalongkorn University  Bangkok Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3447-3178","authenticated-orcid":false,"given":"Udom","family":"Thongudomporn","sequence":"additional","affiliation":[{"name":"Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry Prince of Songkla University  Songkhla Thailand"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,12,2]]},"reference":[{"key":"e_1_2_10_2_1","volume-title":"Optimization of Orthodontic Elastics","author":"Langlade M","year":"2000"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajodo.2012.10.015"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1067\/mod.2000.110584"},{"issue":"8","key":"e_1_2_10_5_1","first-page":"344","article-title":"Dentoskeletal and soft\u2010tissue changes in growing class II malocclusion patients during nonextraction orthodontic treatment","volume":"61","author":"Combrink FJ","year":"2006","journal-title":"SADJ"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/0889-5406(86)90085-5"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0889-5406(99)70311-2"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.4041\/kjod.2015.45.3.113"},{"key":"e_1_2_10_9_1","first-page":"1","article-title":"Are occlusal contact area asymmetry and masticatory muscle activity asymmetry related in adults with normal dentition?","volume":"40","author":"Nalamliang N","year":"2020","journal-title":"Cranio"},{"issue":"3","key":"e_1_2_10_10_1","first-page":"123","article-title":"Disproportionate changes in skeletal muscle strength and size with resistance training and ageing","volume":"9","author":"Degens H","year":"2009","journal-title":"J Musculoskelet Neuronal Interact"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2842.1993.tb01609.x"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/1050-6411(94)90026-4"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2842.2002.00927.x"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2842.1986.tb00646.x"},{"key":"e_1_2_10_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijom.2009.03.006"},{"key":"e_1_2_10_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcms.2009.05.004"},{"key":"e_1_2_10_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.archoralbio.2021.105113"},{"key":"e_1_2_10_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2013.01.002"},{"key":"e_1_2_10_19_1","doi-asserted-by":"publisher","DOI":"10.3758\/BRM.41.4.1149"},{"key":"e_1_2_10_20_1","doi-asserted-by":"publisher","DOI":"10.11607\/jop.1151"},{"key":"e_1_2_10_21_1","doi-asserted-by":"publisher","DOI":"10.1590\/S0103-64402010000400011"},{"key":"e_1_2_10_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/0003-9969(94)90125-2"},{"key":"e_1_2_10_23_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pmed.1000251"},{"key":"e_1_2_10_24_1","unstructured":"UrbaniakGC PlousS.Research Randomizer (Version 4.0) [Computer software].http:\/\/wwwrandomizerorg\/.2013. 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