Orthodontic correction of acquired open bite with TMJ degeneration: A retrospective study of outcomes and stability

Autor: Li-Fan Hsu, Yi-Jen Liu, Shin-Huei Wang, Yunn-Jy Chen, Yi-Jane Chen, Chung-Chen Jane Yao
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of the Formosan Medical Association, Vol 123, Iss 4, Pp 452-460 (2024)
Druh dokumentu: article
ISSN: 0929-6646
DOI: 10.1016/j.jfma.2023.10.006
Popis: Background/Purpose: Newly developed temporary anchorage devices (TADs) serve a strong orthodontic anchorage to intrude molars for correction of anterior open bite (AOB). We measured cephalometric changes in skeletal open bite patients which developed subsequently to temporomandibular joint disorders with bilateral point contacts at terminal molars. Methods: We retrospectively recruited 32 patients who had been treated their TMD before orthodontic correction (overbite: −3.14 ± 1.86 mm). Partial orthodontic appliances were used to intrude posterior teeth using TADs until positive OB obtained (T1). Full fixed appliances were then used to achieve proper overjet and overbite (T2). We collected lateral cephalograms before (T0), during (T1) and after (T2) treatment, and at follow-ups (T3). Using ANOVA, we analyzed the differences among these time points to determine treatment changes and stability of orthodontic results. Results: In this group predominantly comprising young adult women, orthodontic treatment with TADs significantly reduced upper posterior dental heights (T2-T0:-1.84 ± 0.66 mm) and facilitated the retraction and uprighting upper incisors (T2-T0: −9.92 ± 1.72°), to achieve appropriate OJ (T2-T0: −3.21 ± 0.49 mm) and OB (T2-T0: 4.10 ± 0.28 mm) with p
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