title: The effects of two methods of Class III malocclusion treatment on temporomandibular disorders.
abstract: The aim of this research was to evaluate, within a controlled clinical study, the effects of a Delaire-type facemask or a modified Jasper Jumper (JJ) used in the treatment of children with Class III malocclusions due to maxillary retrognathia on temporomandibular disorders (TMDs). Forty-six patients with Class III malocclusions referred for orthodontic treatment were divided into two groups, a test and a control. The test group comprised 33 randomly chosen patients (15 females, 18 males) aged 8-11 years. The control group included 13 patients (eight females, five males) with similar features. TMD assessment was performed before and after treatment using a two-axis questionnaire, the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMDs). Qualitative data were evaluated using chi-square and McNemar tests. No statistically significant differences related to the presence of TMD were observed pre- or post-treatment (P > 0.05). The most commonly encountered diagnosis was arthralgia in the JJ group both before and after treatment. Evaluation of joint and muscle regions showed decreased symptoms, apart from the diagnosed discomforts, in the JJ group (P < 0.05). Reduced symptoms were observed in the Delaire group; however, this reduction was not statistically significant. An increase, not considered to be statistically significant, was observed in the control group. The Delaire-type facemask and modified JJ used in the early phase of Class III malocclusion treatment did not result in TMD.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey. hkurt@istanbul.edu.tr
authors.forename: Hanefi
authors.initials: H
authors.lastname: Kurt
authors.forename: Ceylan
authors.initials: C
authors.lastname: Alioğlu
authors.forename: Banu
authors.initials: B
authors.lastname: Karayazgan
authors.forename: Necat
authors.initials: N
authors.lastname: Tuncer
authors.forename: Hülya
authors.initials: H
authors.lastname: Kılıçoğlu
mesh_terms: D000202:Activator Appliances; D018771:Arthralgia / Q000145:classification / Q000209:etiology; D002648:Child; D005115:Extraoral Traction Appliances; D005157:Facial Pain / Q000145:classification / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D004204:Joint Dislocations / Q000145:classification / Q000209:etiology; D008297:Male; D008313:Malocclusion, Angle Class III / Q000628:therapy*; D008437:Maxilla / Q000002:abnormalities; D019224:Temporomandibular Joint Disc / Q000473:pathology; D013705:Temporomandibular Joint Disorders / Q000145:classification / Q000209:etiology*