Changes of bite force and occlusal contacts in the retention phase of orthodontic treatment: A controlled clinical trial

We aimed to determine whether appliance type affects changes in maximum voluntary bite force (MVBF) and the number of occlusal contacts (NOC) during retention, controlling for sex, age, and body mass index. The sample comprised 176 examinees (70 male, 106 female) aged 14 to 20 years: 30 had maxillar...

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Veröffentlicht in:American journal of orthodontics and dentofacial orthopedics 2017-12, Vol.152 (6), p.767-777
Hauptverfasser: Varga, Suzana, Spalj, Stjepan, Anic Milosevic, Sandra, Lapter Varga, Marina, Mestrovic, Senka, Trinajstic Zrinski, Magda, Slaj, Mladen
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Sprache:eng
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Zusammenfassung:We aimed to determine whether appliance type affects changes in maximum voluntary bite force (MVBF) and the number of occlusal contacts (NOC) during retention, controlling for sex, age, and body mass index. The sample comprised 176 examinees (70 male, 106 female) aged 14 to 20 years: 30 had maxillary and mandibular Essix retainers, 30 had wrap-around retainers, and 30 had a combination of fixed mandibular canine-to-canine retainers bonded on each tooth separately (double twisted, 0.254 mm in diameter, stainless steel ligature wire) and Essix retainer in the maxillary arch; 86 with normal occlusion were not treated. MVBF and the NOC were measured immediately after removal of preadjusted edgewise appliances (Roth prescription), 6 weeks after that, and after the next 4 weeks. Increases in MVBF and the NOC were demonstrated, but subjects with 2 Essix retainers showed lower values than did the others. Changes were related to type of appliance, sex, and age (P 
ISSN:0889-5406
1097-6752
DOI:10.1016/j.ajodo.2017.03.028