Active clinical trials for "Malocclusion"

Thermoplastic devices are used in orthodontic treatment and consists of a series of nearly invisible, removable aligners. However, every device used in the mouth can change the buccal flora and increase the number of bacterias. This is a risk factor for enamel demineralization. The treatment can vary in time of use per day. The patient under orthodontic treatment has to use the device for 22 hour each day. When the period of retention comes, it is reduced to 8 hours. The investigators want to know if the concentration of bacterias in saliva and dental plaque will increase, and if the material can cause damage on gingiva.

The goal of this project is to reduce the radiation exposure in orthodontic patients by the use of a new imaging protocols based on non-ionizing orthodontic records (e.g. digital dental models, three-dimensional photograph) The first step in this process is to develop and validate an orthodontic analysis able to assess craniofacial proportions, dental, skeletal, and facial soft tissue. The investigators working hypothesis is that data from three-dimensional facial photographs and from digital dental casts can be registered accurately and consistently, and the diagnostic information about tooth position and facial soft-tissue derived from them are comparable to x-ray derived data

The purpose of this study is to provide evidence on the effectiveness, the efficiency and efficacy of Peizo-Corticission in accelerating orthodontic tooth movement and reducing orthodontic treatment time.

Fixed orthodontic appliances in combination with intraoral elastics are a common and effective method use in the orthodontic correction of malocclusions. However, their success is largely dependent on the patient's compliance. Failure to wear the elastics as instructed will reduce efficacy of treatment, ultimately increasing treatment time and potentially producing imperfect alignment of teeth. The hypothesis tested is that daily electronic reminders via a mobile application can significantly increase patient compliance, thus effectively improving treatment outcomes.

The aim of our research is to establish a link between malocclusions and oral dysfunctions. The clinical examination includes: caries screening (DMFT and dft scores), a quantification of dental plaque (Silness and Loë's plaque index) and orthodontic treatment need (Haute Autorité de Santé HAS). The functional examination includes improper mouth breathing, abnormal deglutition and incorrect position of tongue at rest.

In dentistry, Peer Assessment Rating (PAR) is an objective way of quantifying how maligned a patient's teeth are by scoring orthodontic study models. It can also be used to assess treatment outcome by comparing pre- and post-treatment scores. Traditionally, PAR scoring is performed manually on plaster casts by a trained and calibrated individual. The plaster casts consume considerable amounts of storage space and the process of manual scoring can be time consuming and expensive. The recent decades have seen a rise in popularity of intra oral scanners in dentistry to produce digital study models. These obviate the need for physical storage space and a software can be used to calculate PAR scores more conveniently and at a faster speed. A review of the current literature showed that the CS 3600 intra oral scanner by Carestream Dental demonstrated acceptable accuracy for clinical use. In this study, patients will receive the usual impressions and their moulds will be PAR scored manually (usual care pathway). In addition, they will also receive intra oral scans with Carestream 3600 and the digital models will be scored by a computer. Manual and digital scores will be compared and analysed for any significant discrepancies.

The purpose of this study is to demonstrate that changing aligners weekly provides similar results to changing aligners every two weeks.

The present day social setup considers facial charisma as an important physical characteristic. The facial characteristics of an individual are measured through anthropometry, photogrammetry, computer imaging and cephalometric radiographs. Cephalometric radiographs offer significant diagnostic information regarding the association between the dental and skeletal structures. By means of photogrammetric measurements, a fresh diagnostic resource is accessible to the orthodontist which permits an intangible, radiation free attainment of measure points of soft tissue with no instrumental expense and radiation to the patient. Orthodontic patients range from adolescents to senior citizens and originate from an assortment of populations, thus an extensive series of representative norms will be ideal. Knowledge of the normal dentofacial outline of every group will make certain better success of treatment to set up the best possible facial agreement. Hence, it is extremely important to assess the soft tissue profile of a patient as it is one of the most vital components of orthodontic diagnosis and treatment planning. The purpose of the present study is to evaluate the photographic characteristics of soft tissue facial profile of patients with class II malocclusion as ethnic differences have been found to be reported in the literature. It is hypothesized that soft tissue facial characteristics on lateral profile photographs and lateral cephalometric radiographs in a sample of local population with class II malocclusion are closely related.

Compare the impact of using rapid maxillary expanders on masticatory muscle activities (Masseter and Anterior Temporalis muscles) among different posterior cross-bite patient (unilateral, bilateral) as well as compare the cross-bite side and non-cross-bite sides of the same preadolescent unilateral crossbite patient before the expansion and after one month of the completion treatment period using surface electromyography device.

The general trend in the orthodontic practice is to become digital in many aspects. Since 1980s, digital photographs have been available and they play a principal role in the orthodontic practice for documentation and diagnosis purposes. Now photographs have an important role in teaching, scientific research and medical examination. Successful orthodontic treatment is based on a comprehensive diagnosis and treatment planning. A few of the fundamental factors in the diagnosis are the spacing condition, tooth size, arch form and dimensions, as well as the tooth-arch discrepancies. Intraoral photographs' major role is to enable orthodontists to document and analyze the occlusal relationships as well as the dental and soft-tissue features in order to arrive at a good diagnosis and an appropriate treatment plan. In 1975, Robert Little developed Little's irregularity index (LII). The index was proposed to assess teeth irregularity, crowding, relapse, and alignment of anterior teeth as it measured the linear displacements in the horizontal plane between contact points of anterior teeth, ignoring vertical displacement, from mesial surface of one canine to the contra-lateral one. The sum of the 5 liner measurements of displacements was the LII score. The higher the index value, the more severe irregularity of the teeth was. LII has been originally developed for mandibular incisors to study relapse; however, researchers have used it to assess upper and lower incisors irregularity Tooth-size-arch-length discrepancy (TSALD) is widely used on study models to assess the level of harmony between tooth size and the supporting basal bone. Bolton analysis is another important measurement used to identify disharmony between maxillary and mandibular tooth size which is considered an important factor to ensure the success of orthodontic treatment. With the application of the suggested formulas, the overall ratio should be 91.3% (±1.91) and the partial (anterior) ratio should be 77.2% (±1.65). The validity and reliability of performing the above mentioned analyses on images taken of the dental arches have not been evaluated yet in the literature. This is the aim of the current project.