Incisor crossbite and repaired unilateral cleft lip and palate: changes in jaw movement and temporalis muscle activity before and after edgewise treatment--case report

The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association
S Miyawaki, K Takada

Abstract

To examine the changes in jaw movement and temporalis muscle activity of a patient with unilateral cleft lip and palate before and after edgewise treatment. Clinical case study. University dental hospital, department of orthodontics. A 12-year 3-month-old male with incisor crossbite, molar malocclusion, and repaired unilateral cleft lip and palate who had completed first-phase orthodontic treatment. This patient was treated with an edgewise appliance. Jaw movement and temporalis muscle activity during the chewing of a hard gummy jelly were recorded at 2 kHz from the sixth to the twentieth stroke before edgewise treatment and after a retention period of 2 years. Optimum intercuspation of teeth was achieved. The reversed crossing jaw-movement pattern before treatment changed to a normal grinding after treatment. The posterior temporalis muscle on the chewing side exhibited an earlier burst than the contralateral one during chewing at the post-treatment stage, as is observed in cases with good occlusion. Improvement in the occlusion using an edgewise appliance is necessary for acquiring a good masticatory function in patients with incisor crossbite, molar malocclusion, and cleft lip and palate.

Citations

Jan 5, 2002·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·M Okan AkcamF Erhan Ozdiler
Nov 10, 2011·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Tomohiro FukunagaTakashi Yamashiro
Feb 20, 2007·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Yoshiko NakataKazuo Tanne
Apr 26, 2019·The Journal of Craniofacial Surgery·Arezoo JahanbinFarid Sharifi
Dec 2, 2017·International Journal of Paediatric Dentistry·Liliana Szyszka-SommerfeldMonika Machoy
Apr 1, 2021·European Journal of Oral Sciences·Diana CassiMaria Grazia Piancino

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