Long-term skeletal and dental effects of facemask versus chincup treatment in Class III patients
| Autor: | Brigitte Wendl, M. Wendl, H. Droschl, T. Wendl, A. P. Muchitsch, M. Stampfl, André Walter, Heinz Winsauer |
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| Rok vydání: | 2017 |
| Předmět: |
Male
Pathology medicine.medical_specialty Adolescent Tooth Movement Techniques Facemask Cephalometry Orthodontics Class iii Orthodontics Corrective Langzeitstabilität Mandibular growth Young Adult 03 medical and health sciences 0302 clinical medicine Extraoral Traction Appliances Humans Orthodontic Appliance Design Medicine Gonial angle Orthopedic appliances 030212 general & internal medicine Child Retrospective Studies Longterm stability Kopf-Kinn-Kappe business.industry Class iii malocclusion Klasse III Syndrom Upper lip 030206 dentistry Chincup Gesichtsmaske Kieferorthopädische Apparaturen Malocclusion Angle Class III Initial phase Class III syndrome Oral and maxillofacial surgery Female Original Article Oral Surgery business After treatment Follow-Up Studies |
| Zdroj: | Journal of Orofacial Orthopedics |
| ISSN: | 1615-6714 1434-5293 |
| Popis: | Objectives To investigate the skeletal and dental changes during chincup versus facemask treatment, to compare the long-term effects of the two appliances, and to document the impact of each on treatment success. Methods In all, 61 patients with Class III syndrome were retrospectively analyzed at three examination times: 7.8 ± 1.7 years of age (T0, pretreatment), 9.6 ± 2.4 years of age (T1, posttreatment), and around 15–20 years later (T2, long-term follow-up). Results Significant changes of specific cephalometric parameters for all treatment times: T0–T1 (SNA, interbase and gonial angle, Björk’s sum angle, maxillomandibular differential, and distance of upper lip to esthetic line), T1–T2 (NL-NSL, SNB, mandibular-body length, effective mandibular length, and effective maxillary length), and T0–T2 (mandibular-body length, effective mandibular length, effective maxillary length, maxillomandibular differential, SNB, ANB, gonial angle, Björk’s sum angle, and Wits appraisal). The T1–T2 results illustrate that in both treatment groups the typical Class III growth pattern often reappeared after treatment, including gains in SNB angle, condylion-gnathion length, and gonion-menton distance. Conclusions Either a facemask or a chincup may be effectively used to treat Class III malocclusion. There were differences in long-term stability. Maxillary development was similarly favorable in both groups of patients with successful outcome. The subgroup in whom chincup treatment had failed were mainly characterized by excessive mandibular growth, or lack of maxillary catch-up growth, with deterioration of the maxillomandibular relationship notably in the initial phase of treatment. Early chincup treatment did not have an adverse impact on the temporomandibular joints. |
| Databáze: | OpenAIRE |
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