View clinical trials related to Orthodontics.
Filter by:Fixed orthodontic braces are routinely used to straighten teeth and correct the bite of individuals. Once the braces are fit, the patient is recalled every few weeks to adjust or tighten the brace. Although convention states that the patient returns every 6-8 weeks to have the brace adjusted, there is no consensus or evidence to support a specific timeframe. Indeed some orthodontist see their patients as frequently as every 4 weeks and others as long as every 10 weeks. The aim of this investigation is to determine whether the amount of time between brace adjustment appointments has an effect on the overall treatment time. Knowing which appointment interval will lead to the shortest overall treatment time will be of benefit to patients as prolonged orthodontic treatment may be associated with an increased incidence of adverse effects associated with orthodontic treatment. Patients who are to be treated with fixed orthodontic braces at will be invited to take part in the study. Consenting subjects will be randomly allocated into one of four groups. The first will be seen to adjust their brace every 4 weeks, the second group every 6 weeks, the third group every 8 weeks and the fourth group every 10 weeks. The primary outcome measure is the total treatment time. The mean treatment time of each of the four groups will be compared to establish whether or not treatment appointment intervals affects treatment time. Secondary outcome measures will include difference in number of appointments required throughout the course of treatment between groups, differences in treatment outcomes, differences in patient compliance.
A Randomized clinical trial comparing two different force magnitudes in maxillary posterior segment intrusion in adult patients with skeletal open bite malocclusion
Objective: Periodontally accelerated osteogenic orthodontics(PAOO) will minimize treatment time. The current study will be carried to evaluate the effectiveness of different bone grafts with a modified, less invasive corticotomy technique in the treatment of adult patients with moderate crowding. Subjects and Methods: Thirty orthodontic patients will be selected. Patients were randomly classified into three groups. Group I will be treated with a modified technique of corticotomy, whereas group II will be treated with the same technique combined with PAOO using bovine derived xenograft, and group III will be treated with the same technique combined with PAOO using with bioactive glass. The total duration of active orthodontic treatment will be estimated. Probing depth, bone density and root length will be also evaluated. The measurements will be recorded.
The purpose of this study is to compare the accuracy of measurements derived from a commercially available direct intra-oral scanning system with those taken from plaster study models, and to compare cost implications of both systems. The investigators will test the hypotheses: - There is no systematic difference between measurements taken from the Trios scanner and study models. - There is no difference in the cost of producing digital models.
Is their a association between the objective and subjective severity of a malocclusion, quality of life and self-esteem/personality (as modifier between objective/subjective severity and quality of life (cfr study Agou et al., 2008) ? A second goal is to compare motivation and expectations and the objective and subjective severity of the malocclusion on the other hand.
Research questions: 1. Will the panoramic images derived from cone beam CT data give better diagnostic ability than conventional panoramic radiographs? 2. Will 3D cephalometric analysis offer the orthodontists and surgeons better information for treatment planning? 3. Will the 3D cephalometric analysis give more accurate treatment plan and better treatment outcome? General hypothesis and special aims Overall aims: - To compare 2D versus 3D cephalometric analysis: treatment planning and therapeutic outcome. - To determine the accuracy and diagnostic ability and usability of the 3D cephalometric analysis. - To evaluate the diagnostic ability and usability of the panoramic image derived from cone beam CT data as compared to 2D panoramic images. - To evaluate the value of the cone beam CT data in cephalometric analysing process for orthodontic and maxillofacial surgery treatment. Hypotheses: 1. The availability of the 3D cephalometric analysis influences the orthodontic and maxillofacial treatment plan and decision, and might change the treatment outcome. 2. Panoramic images derived from cone beam CT data may provide equal information for diagnosis as conventional panoramic images. 3. Cone beam CT will be able to replace "classic orthodontic imaging" being more time and dose efficient and having a beneficial effect on treatment outcome.
In orthodontics, conventional fixed appliances, usually consisting of prefabricated components, require step-by-step adjustment in order to move teeth in the planned direction. May treatment be improved with customized archwires? Study hypotheses: - By using CAD/CAM in planning and fabrication of customized archwires, unnecessary tooth movements can be avoided and teeth can be moved on their direct path to the intended position. - The application of CAD/CAM improves reproducibility, efficiency, and quality of orthodontic treatment.
In orthodontics, conventional fixed appliances, usually consisting of prefabricated components, require step-by-step adjustment in order to move teeth in the planned direction. May treatment be improved with customized archwires? Study hypotheses: - By using CAD/CAM in planning and fabrication of customized archwires, unnecessary tooth movements can be avoided and teeth can be moved on their direct path to the intended position. - The application of CAD/CAM improves reproducibility, efficiency, and quality of orthodontic treatment.