نتایج جستجو برای: orthodontic appliance
تعداد نتایج: 20372 فیلتر نتایج به سال:
The aim of this study was to evaluate the effectiveness of Herbst and Twin-block appliances for established Class II Division I malocclusion. The study was a multicenter, randomized clinical trial carried out in orthodontic departments in the United Kingdom. A total of 215 patients (aged 11-14 years) were randomized to receive treatment with either the Herbst or the Twin-block appliance. Treatm...
BACKGROUND Torque of the maxillary incisors is crucial to occlusal relationship and esthetics and can be influenced by many factors. The aim of this study was to assess the relative influence of the material of the orthodontic appliance (adhesive, bracket, ligature, and wire) on tooth displacements and developed stresses/strains after torque application. METHODS A three-dimensional upper righ...
We performed an orthodontic treatment combined with mandibular distraction osteogenesis in a 15-year-old patient who wanted a correction of a chin deficiency and a protruding upper lip. The patient had an Angle Class II division 1 malocclusion with mandibular retrusion, a low mandibular plane angle, and scissors bite. First, a quad-helix appliance was applied to the mandibular dentition to corr...
The preadjusted orthodontic appliance has improved the efficiency and effectiveness of the orthodontist in achieving good final results for patients in general. However, the orthodontist is limited in achieving excellent final results because of individual patient variation from the prescription of the preadjusted appliance as well as the orthodontist's ability to precisely place the appliance....
OBJECTIVE The aim of this prospective longitudinal investigation was to compare the relationship between the temporomandibular joint (TMJ) condyles and the temporal fossae by means of tomography before and after the orthodontic correction of Class II, division 1 malocclusion using the activator appliance. MATERIALS AND METHODS The final sample consisted of 26 consecutively treated Class II, d...
Efficient plaque control is an important factor in the maintenance of dental health during fixed orthodontic appliance therapy (Zachrisson, 1976; Mitchell, 1992; Atack et al., 1996). These patients are at higher risk of developing white spot lesions (Zachrisson, 1976; O’Reilly and Featherstone, 1987) and gingival inflammation (Legott et al., 1984; Huser et al., 1990) due to the altered oral hyg...
INTRODUCTION Although it is well known that treatment with fixed appliances increases the risk of enamel demineralization, little information is available about preventive measures that orthodontists actually use. This study was executed to survey measures used in orthodontic practices to prevent decalcifications during fixed appliance treatment, and to compare these measures with the available...
INTRODUCTION The length of time that it takes an orthodontist to treat adult patients varies widely. OBJECTIVE The aim of this study was to investigate how different variables influence treatment time. METHODS Seventy clinical case reports of successfully treated adult patients were examined. The patients were selected from 4,723 records held by three experienced orthodontists. The influenc...
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