View clinical trials related to Malocclusion.
Filter by:Patient safety is a great concern for the whole society. Since the investigators have a leadership in the medical field in Taiwan, the investigators should be courageous to face the reality from the patients seeking second opinions undergoing orthodontic treatment. Orthodontics just became a recognized specialty by the Department of Health in Taiwan in 2009. It is just a beginning to set up the training course criteria at the national level. It will be a good timing for us to look at the treatment quality when patients seeking second opinions at NTUH. Whether the unsatisfied results are from the patient's unrealistic expectation, patient's compliance issue, doctor's diagnosis, treatment planning or skills, or a simple communication problem, depend on a good systemic analysis from the records and questionnaire collected in a timely fashion. The investigators plan to ask patients who are undergoing full-mouth orthodontic treatment and seeking second opinion to join this study. The investigators will thoroughly explain to patients before they agree to take records and fill in questionnaire. Then the investigators use these records to perform root cause analysis. Our hypothesis is that the risk of adverse event (AE) is related to the training quality, communication skills, patient's understanding and compliance. From these results, the investigators shall be able to assess the risk of AE and make the education policy either at continued education level or special training courses towards a patient satisfied treatment.
Class II malocclusion (mismatch between the upper and lower jaw in which the lower jaw appears to be smaller from a profile point of view) are common in the general population. Around 1/3 of the population have some degree of this skeletal/dental problem and it is one frequent reason why patients decide to undergo orthodontic treatment. Treatment alternatives will basically depend on the facial skeletal development of the patient and also on the magnitude of the skeletal/dental discrepancy. For patients that are not yet fully skeletal mature, the treatment of mild to moderate Class II malocclusion involves a combination of a small skeletal growth modification effect and more significant dental movements. For skeletal mature individuals with a severe mismatch, the treatment usually involves jaw surgery to fully correct the malocclusion. For less severe cases orthodontic camouflage exclusively done by orthodontic movements is an option. If the case is not severe enough to warrant a surgical approach there are several treatment alternatives. One of the most commonly used options is the use of orthodontic loaded springs that apply forces through brackets and arch wires bonded into the teeth so that the teeth will interrelate better. A different alternative was proposed some years ago. The Xbow (spelled Crossbow) appliance differs from the above-proposed option in that no brackets are bonded or arch wires used. The orthodontic springs are applied to a metal framework cemented on some upper and lower teeth. Once the skeletal/dental problem is believed to have been significantly improved, fine tuning of the remaining dental problems is managed with brackets and arch wires. The theoretical advantage of such a design is that adverse effects, such as root resorption and decalcification from the long-term use of brackets and arch wires, are theoretically minimized as the brackets and arch wires have to be used for a shorter period of time. Although there are some retrospective reports about the skeletal and dental effects of the Xbow appliance and only one prospective trial comparing the skeletal and dental changes to a non-treated growing sample; no randomized clinical trial has yet evaluated the changes compared to a current standard of care alternative which is the simultaneous use of loaded springs concurrent with brackets and arch wires.
The Astra Tech Osseospeed Profile Implant design when placed in the healed extraction site maintains the marginal bone level
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.
Sleep is a vital physiological function for the maintenance of health and quality of life. Harmful, non-nutritive and parafunctional oral habits are believed to have a negative effect on adequate rest at night. The aim of the present study was to determine associations between quality of sleep and harmful oral habits among children aged three to six years. Fifty children from a private school in São Paulo (Brazil) were evaluated using two questionnaires on sleep quality and harmful oral habits. The data were submitted to descriptive analysis. The chi-square test was employed for the categorical variables and analysis of variance (ANOVA) was carried out to compare mean values. The Student's t-test was used for all analyses, with the significance level set at 5%. The SPSS 12.0 program for Windows was used to analyze the results.
Development of three-dimensional craniofacial cephalometric analysis for virtual planning in orthognathic surgery.
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.
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
Enlarged tonsils and malocclusion have relationship with sleep disturbance in children. The consequences of these features can include deviation of normal craniofacial growth such that this may result in a facial morphology more suitable to the development of sleep apnea later in life. The aim of this study was to compare the growth redirection, the evolution of respiratory symptoms and the pharyngeal size of snoring children with obstructive tonsils from the waiting list for surgery treated with the Bioajusta X orthodontic appliance.This new protocol of orthodontic treatment promotes maxillary expansion, mandibular advancement and proper tongue positioning on swallowing , that together may be helpful on remodeling the upper airways.
Research problem: Anchorage reinforcement is effective with headgear provided patient compliance is optimal. Nance palatal arch have also been shown to be effective. Microscrews despite their popularity however have no scientific evidence to support their use. Aim: To compare the effectiveness of 3 methods of anchorage reinforcement 1) headgear 2) Nance palatal arch 3) orthodontic micro-screws. Hypothesis: There is no difference in the amount of anchorage loss between the three methods of anchorage reinforcement. Design: Randomized clinical trial. Setting: District General Hospital orthodontic department Participants: 78 patients requiring "absolute anchorage". Interventions: The subjects will be randomized into 3 groups. In group 1 headgear will be requested 12-14 hours per day. In group 2 a nance palatal arch will be placed for use as intra oral anchorage reinforcement. In group 3, orthodontic micro-screws will be used for anchorage. Method of investigation: The study will be of 78 'absolute anchorage' patients older than 12 years randomly assigned to one of three groups of anchorage reinforcement Outcome measures: 1. Anchorage loss measured from lateral Cephalometric radiographs and 3-D model scanning, records will be taken at three points 2. Patient perception of the different treatment methods, including surgical experience Data analysis: The data will be analysed on an intention to treat basis. Basic descriptive statistics and uni-variate tests will initially be done to explore the data. Final data analysis will involve the relevant multi-variate statistical modeling. Dissemination: Conference proceedings, journal papers and the Cochrane oral health group.