ABSTRACT
PURPOSE: The present study evaluated electromyographic activity (EMG), masticatory performance, and tongue strength in children without and with orthodontic treatment needs. PATIENTS AND METHODS: A total of 90 children were screened and divided into the following groups: Group I (no treatment needed; mean age: 8.00 ± 0.43 years; n = 26), Group II (few malocclusions, treatment needed; mean age: 8.89 ± 0.43 years; n = 28), and Group III (slight-to-borderline treatment needed; mean age: 8.44 ± 0.22 years; n = 36). Orthodontic treatment need was classified on the basis of IOTN-DHC (Index of Orthodontic Treatment Need - Dental Health Component). The electromyographic Trigno EMG Systems was used for muscle analysis and the Iowa Oral Pressure Instrument (IOPI) was used to measure tongue strength. Data were analyzed using normality tests and one-way analysis of variance with a Bonferroni post hoc test (p ≤ 0.05). RESULTS: EMG in almost all mandibular movements was higher in Group III with statistically significant differences compared to position at rest: right masseter (p = 0.03); protrusion: left temporal (p = 0.02); saliva swallowing: left temporal (p = 0.05) and water swallowing: orbicularis oris mouth, right upper segment (p = 0.05). Lower masticatory performance was found in Group III, but the difference compared to Group I and II was not significant. There were no significant differences between the groups in terms of tongue strength. CONCLUSIONS: Children with borderline orthodontic treatment needs show functional disorders of the stomatognathic system.
Subject(s)
Dental Care for Children , Health Services Needs and Demand , Malocclusion/therapy , Orthodontics, Corrective , Stomatognathic System Abnormalities/therapy , Child , Electromyography , Female , Germany , Humans , Male , Malocclusion/classification , Malocclusion/diagnosis , Stomatognathic System Abnormalities/classification , Stomatognathic System Abnormalities/diagnosisABSTRACT
Pfeiffer syndrome is a rare fibroblast growth factor receptor-related craniosynostosis with variable clinical presentations. We describe new dental findings of hypodontia, microdontia, dilacerations, and radicular dentin dysplasia in a 19-year-old girl, and discuss the oral health management.
Subject(s)
Acrocephalosyndactylia/diagnosis , Heart Defects, Congenital/diagnosis , Stomatognathic System Abnormalities/etiology , Stomatognathic System Abnormalities/therapy , Consanguinity , Female , Humans , Pedigree , Phenotype , Young AdultABSTRACT
Introducción: Las disfunciones temporomandibulares (DTM) son un conjunto de síntomas y signos donde existe una implicación importante de la musculatura masticatoria en particular de los músculos temporales. Objetivos. Observar los efectos de un tratamiento osteopático global de cuatro sesiones en pacientes con DTM y evaluar las modificaciones de aquellas variables objeto de medición. Material y métodos. Se realizaron cuatro sesiones de osteopatía una vez por semana durante un mes en 9 sujetos con DTM. Se llevaron a cabo mediciones algométricas de los puntos gatillos (PGs) de la musculatura temporal y del masetero, inclinométricas en todos los movimientos cervicales así como mediciones de los movimientos de la articulación temporomandibular (ATM) en abertura, diducción derecha e izquierda, antes de la primera sesión y una semana después de la última sesión recibida Resultados. En el análisis intragrupal se obtuvieron datos estadísticamente significativos en el umbral del dolor a la presión (UDP) del Masetero derecho (MASderecho) (p=0,050), UDP del Temporal derecho TEMdcho) (p=0,035), lateroflexión derecha (SD) (p=0,012) y en la abertura (p=0,008). Y una tendencia a la significación en UDPMASizq (p=0,068). Conclusiones. La terapia osteopática global produce un aumento en el UDP de los PGs de los músculos temporales maseteros derechos, y un aumento de la movilidad en lateroflexión derecha cervical y abertura bucal
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Subject(s)
Humans , Temporomandibular Joint Disorders/therapy , Pain Threshold , Manipulation, Osteopathic/methods , Stomatognathic System Abnormalities/therapy , Temporal Muscle/pathology , Masseter Muscle/pathologyABSTRACT
The aim of this study is to investigate the biomechanics for orthodontic tooth movement (OTM) subjected to concurrent single-tooth vibration (50Hz) with conventional orthodontic force application, via a clinical study and computational simulation. Thirteen patients were recruited in the clinical study, which involved distal retraction of maxillary canines with 1.5N (150g) force for 12weeks. In a split mouth study, vibration and non-vibration sides were randomly assigned to each subject. Vibration of 50Hz, of approximately 0.2N (20g) of magnitude, was applied on the buccal surface of maxillary canine for the vibration group. A mode-based steady-state dynamic finite element analysis (FEA) was conducted based on an anatomically detailed model, complying with the clinical protocol. Both the amounts of space closure and canine distalization of the vibration group were significantly higher than those of the control group, as measured intra-orally or on models (p<0.05). Therefore it is indicated that a 50Hz and 20g single-tooth vibration can accelerate maxillary canine retraction. The volume-average hydrostatic stress (VHS) in the periodontal ligament (PDL) was computationally calculated to be higher with vibration compared with the control group for maxillary teeth and for both linguo-buccal and mesial-distal directions. An increase in vibratory frequency further amplified the PDL response before reaching a local natural frequency. An amplification of PDL response was also shown to be induced by vibration based on computational simulation. The vibration-enhanced OTM can be described by mild, vigorous and diminishing zones among which the mild zone is considered to be clinically beneficial.
Subject(s)
Stomatognathic System Abnormalities/therapy , Tooth Movement Techniques/methods , Tooth/physiopathology , Adolescent , Child , Computer Simulation , Finite Element Analysis , Humans , Models, Anatomic , Models, Biological , Periodontal Ligament/physiology , VibrationABSTRACT
Introdução: resultados estéticos na cirurgia ortognática são um dos principais objetivos dos pacientes, ortodontistas e cirurgiões. A correção da deformidade óssea maxilomandibular, geralmente, restabelece as funções do sistema estomatognático e a estética facial. No entanto, nem sempre obtém-se simetria e projeção desejada dos tecidos moles somente com a movimentação óssea. Nesse sentido, o preenchimento com o polimetilmetacrilato (PMMA) atua como coadjuvante na tentativa de se obter contornos faciais que alcancem as expectativas estéticas dos pacientes e profissionais. Objetivo: o presente artigo revisa a utilização do metilmetacrilato como material de preenchimento na região craniofacial, abordando a sua perspectiva histórica, vantagens e aspectos biológicos. As principais indicações são ilustradas com figuras e casos clínicos
Subject(s)
Orthognathic Surgery/methods , Methylmethacrylate/therapeutic use , Polymethyl Methacrylate/therapeutic use , Stomatognathic System Abnormalities/therapyABSTRACT
The oromandibular and limb hypogenesis syndrome is characterized by aglossia or hypoglossia presenting with limb anomalies. In this case report, we describe congenital hypoglossia associated with glossopalatine ankylosis and middle finger hypomelia, a type III-D malformation in the Hall Classification. The orthodontic and surgical treatment consisted of 3 maxillary expansions, mandibular surgery, and dental alignment. This extensive treatment resulted in acceptable function and esthetic appearance; however, because of lingual hypoglossia, it did not effect perfect occlusion.
