Posterior crossbite is defined as an inadequate transversal relationship of maxillary and mandibular teeth. Even when eliminating the etiologic factors, this malocclusion does not have a spontaneous correction, and should be treated with maxillary expansion as early as possible. This treatment aims at providing a better tooth/skeletal relationship, thereby improving masticatory function, and establishing a symmetrical condyle/fossa relationship. Should posterior crossbite not be treated early, it may result in skeletal changes, demanding a more complex approach. Additionally, an overcorrection expansion protocol should be applied in order to improve the treatment stability. Although the literature has reported a high rate of relapse after maxillary expansion, the goal of this study was to demonstrate excellent stability of the posterior crossbite correction 21 years post treatment.
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http://dx.doi.org/10.1590/s1678-77572012000200026 | DOI Listing |
Front Public Health
December 2024
The First People's Hospital of Lianyungang, Lianyungang, China.
Adenoid hypertrophy (AH) is characterized by pathological hyperplasia of the nasopharyngeal tonsils, a component of Waldryer's ring, which represents the first immune defense of the upper respiratory tract. The pathogenic factors contributing to AH remain to be comprehensively investigated to date. Although some studies suggest that environmental exposure to smoke and allergens, respiratory tract infections, and hormonal influences likely contribute to the development of AH, further research is necessary for fully elucidating the effects of these factors on the onset and progression of AH.
View Article and Find Full Text PDFAnn Ital Chir
December 2024
Department of Orthodontics, Dental Disease Prevention and Treatment Institute of Huangpu District, 200002 Shanghai, China.
Aim: Class II Division I malocclusion is common in pediatric orthodontics, and is often associated with malocclusion and poor muscle functionality. However, research on post-treatment changes in maxillomandibular dimensions, excluding normal development influences, is limited. Therefore, this study aimed to investigate the effects of Myobrace® appliance and targeted muscle functional training on maxillomandibular dimensions in children with Class II Division I malocclusion, compared to directed oral muscle training alone.
View Article and Find Full Text PDFShanghai Kou Qiang Yi Xue
October 2024
Department of Oral medicine, Cangzhou People's Hospital. Cangzhou 061000, Hebei Province, China. E-mail:
Purpose: To investigate the functional and structural characteristics of temporomandibular joint(TMJ) in introverted deep overbite patients with severe wear, to analyze the correlation between the vertical distance of the lower 1/3 of the face and TMJ space, and to compare the clinical efficacy of multidisciplinary treatment with orthodontics and prosthodontics on TMJ function.
Methods: Eighty patients with deep overbite and severe abrasion and forty subjects with normal occlusion admitted to our hospital from January 2019 to June 2023 were enrolled in this study. The clinical data were collected and the functional and structural characteristics of TMJ were collected.
J Med Internet Res
December 2024
Kunming Medical University Affiliated Stomatological Hospital & Yunnan Key Laboratory of Stomatology, Department of Orthodontics, Kunming Medical University, C Building, Hecheng International1088 Haiyuan Middle Road, Kunming, CN.
Background: Investigating the safe range of orthodontic tooth movement is essential for maintaining oral and maxillofacial stability post-treatment. Although clear aligners rely on pre-treatment digital models, their effect on periodontal hard tissues remains uncertain. By integrating CBCT-derived cervical and root data with crown data from digital intraoral scans, a three-dimensional (3D) fusion model may enhance precision and safety.
View Article and Find Full Text PDFJ Orofac Orthop
December 2024
Paediatric Dentistry, Preclinical Dentistry Department, European University of Madrid, Madrid, Spain.
Aim: To determine whether unilateral preferent chewing (UPC) affects the position and angulation of the permanent maxillary canine germ on the preferred side.
Materials And Methods: In a retrospective cross-sectional study, medical records from children 7.91(± 0.
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