View clinical trials related to Retrognathia.
Filter by:Diverse viewpoints exist regarding the correlation between the conventional rapid maxillary expansion (RME) and facemask approach and the alternative RME and facemask hybrid technique (Alt-RAMEC) in terms of the degree of maxillary protraction. The findings of the study may offer a novel approach to protocol selection based on the anomaly's degree of severity. The objective of this investigation is to assess and contrast the skeletal and dentoalveolar outcomes of three distinct Alt-RAMEC techniques.
The aim of this prospective study is to analyze the postoperative paresthesias experienced in patients who undergo bilateral sagittal split osteotomies (BSSO) using an ultrasonic saw, versus a reciprocating saw. Patients included in the study are ages 15-45 scheduled to undergo BSSO surgery at the University of California, San Francisco. One side of the patient's mandible will be instrumented with either the Stryker Sonopet ultrasonic saw or traditional reciprocating saw, while the other side will receive the remaining intervention (determined via randomization on the day of surgery). Patient paresthesias will then be analyzed on each side for 3 months postoperatively (at postoperative days: 1, 7, 14, 28, and 84). Sensory examinations will be carried out by blinded examiners using von Frey hairs and two point discrimination testing. Patients will also subjectively rate their sensation on each side. The results will then be analyzed to determine if patient paresthesias, including the severity and duration, differed depending on which instrument was used, the ultrasonic or reciprocating saw.
To compare dentoskeletal changes in patients with skeletal class II malocclusion induced due to treatment with orthodontic appliances; removable twin block appliance and fixed AdvanSync2 appliance in two different age group patients.
This study aims at evaluating the effects of mandibular advancement on pharyngeal airway space and nocturnal breathing in children with skeletal class II division1 malocclusion. Fifty patients will be enrolled in the study divided into control and experimental groups.
Patients with class II malocclusion and retrognathic mandibles will be treated using functional appliances and asses the remodeling that is expected to occur in the temporomandibular joint (TMJ) using cone-beam computed tomography (CBCT) images and we will register mandibular movements using electronic axiograph ( a specific apparatus used to record jaw movements in three dimensions). There are three groups : 1. Activator Group 2. Twin block Group 3. Control Group with no treatment. Patients will be allocated to the three groups randomly. Data will be collected using three different approaches: - CBCT images before treatment and 12 months after treatment - Axiograph registrations before treatment and 12 months after treatment
Differences in nasotracheal intubation pathway anatomy will be observed between healthy patients and patients with maxillary retrusion. The results will clarify the nasotracheal intubation tube preference for these patients.
The correction of Class II malocclusion is one of the most common problems facing the orthodontist, with an estimated one-third of all orthodontic patients treated for this condition. Many strategies are available for Class II treatment on growing patients, and most orthodontists tend to choose a treatment protocol based on what part of the craniofacial deformity they believe the appliance will affect the most. A number of authors have described the dentoalveolar and skeletal changes induced by the Herbst appliance. The dentoalveolar effects consist of distalization of the maxillary molars and forward movement of the mandibular dentition. The main skeletal change "mandibular stimulation" is acceleration of a patient's inherent mandibular growth rather than increased growth beyond what would occur without treatment. Maxillary molar distalization, is one of the Class II treatment. Mini-implants have become popular in recent years, and various kinds of mini-implant-borne distalization approaches have been described. Because Class II correction appears to be achievable with either appliance, a follow-up question is whether there is a difference in the esthetic outcomes. However, because of the complexity of the human face and the subjectivity of facial beauty, a simple set of measures of lines or angles cannot quantify facial beauty. With the advances in 3-dimensional imaging, it is now possible to capture and superimpose digital images and measure the changes in the soft tissues from 3-dimensional images. Such advances in facial imaging allow a more thorough investigation of changes in 3 dimensions and prevent the inherent loss of information that results from 2-dimensional imaging. Optical scanners with short shutter speeds are convenient for clinicians and patients for capturing soft-tissue records. Bearing in mind that the aim of orthodontic treatment is to achieve facial harmony along with excellent occlusion, one of the most important objectives of an orthodontist should be the improvement of facial appearance. Therefore, it is important to gain a better understanding of how or whether orthodontic procedures affect the appearance of the soft tissues. Thus, the aim of this clinical trial is three dimensional evaluation of soft tissue facial changes on late mixed dentition patients following maxillary arch distalization with palatal screws one group and acrylic split herbst patients on other group and to compare these changes.
Prospective, randomized, double-blind, placebo-controlled, mono center, Phase III trial to compare EXACYL in preventive with placebo on perioperatory bleeding in orthognathism surgery.
Bicortical screws have been widely used for mandibular osteosynthesis during orthognathic surgery.Transoral placement of bicortical screws is a rigid fixation method in orthognathic surgery, which is less often used. The aim of this study was to compare postoperative outcome of transoral versus transbuccal bicortical screw placement during orthognathic surgery. This study comprises an academic, retrospective, monocentric study in which the charts of orthognathic patients operated between January 2010 and December 2012 were retrospectively reviewed. Postoperative complications were registered. Demographic, dental and surgical parameters are examined as potential risk factors for the occurence of postoperative complications.
patients were enrolled by the inclusion criteria and were undergo lefort 1 maxillary osteotomy. after the latency phase the distraction was done in anterior- posterior vector. patients were divided by randomized allocation in 2 groups. in group 1 the distractor was removed after consolation phase, and in group 2 fixation devices were placed immediately after removal of distractors. data regarding relapse were analyzed by lateral cephalogram X-ray taken in 3 different phases of the trial. change of occlusal plane and the "A point" of the cephalometric analysis were determined as reference point of the study.