View clinical trials related to Malocclusion.
Filter by:Primary Objective Evaluating the effectiveness of canine retraction in terms of: rate of movement and rotation using 0.020-inch slot and dual-slot systems in comparison with the 0.022-inch slot system. Secondary Objectives - Measuring the amount of molar anchorage loss during canine retraction between the different bracket slot appliances. - Evaluation of alignment efficiency using different bracket slot appliances. Null Hypothesis There is insignificant difference in the effectiveness of canine retraction with different bracket slot size appliances. • Evaluation of the bracket slot and archwire dimensions precision
The objective of this study is to determine to effect of PBM Ortho, a photobiomodulation device, in adult patients undergoing clear aligners orthodontic treatment. We hypothesize that PBM Ortho will reduced the orthodontic associated pain in the clear aligner patients. This effect will be evaluated by recording the pain on visual analog scale given to the patients before the placement of clear aligners and collecting saliva.
Together with the increased adult patient demand for orthodontic treatment and the push toward increasingly personalized treatment, technology developments have resulted in a growing worldwide demand for clear aligners, to the point that they are now an essential part of any orthodontic practice. Despite the widespread use of the technique, the existing literature about reliability of orthodontic tooth movement with Invisalign aligners seems not encouraging. Several papers have demonstrated that what is virtually planned is not what is clinically achievable. However, it should be considered that clear aligner orthodontics techniques are customized not only for the patients but for orthodontists too. Therefore, virtual treatment plan design, in terms of attachments' design and placement, orthodontic tooth movement (OTM) staging and aligner deformation overengineering, or in other words aligners biomechanics knowledge, plays a crucial role in defining the quality of the orthodontic treatment with Invisalign aligners. Based on these considerations the present study was designed to answer two research-clinical questions: 1) which are the less predictable orthodontic movements with Invisalign aligners when the treatment plan is designed by expert operators? and 2) which is the impact of the orthodontist experience, in terms of patient motivation, on the predictability of orthodontic tooth movement with Invisalign aligners? To answer those questions, the predictability of OTM in a sample of Invisalign patients treated by expert operators was compared with the predictability of OTM in a sample treated by post-graduate students. The null hypothesis for question 1 is that all the prescribed orthodontic tooth movements are predictable, while the null hypothesis for question 2 is that the reliability of orthodontic tooth movement is not affected by operator experience. 98 patients (31 M, 67 F; mean age 28 ± 12 years) were selected among those in treatment at the Department of Orthodontics of the University of Turin, which is the coordinating center, and at 5 private orthodontics offices across Italy. The inclusion criteria for practitioners were as follows: orthodontist with huge and renewed experience in Invisalign treatments; has the ability to scan plaster model or to collect intraoral scans and upload (via internet) the files obtained to a central repository; affirms that the practice can devote sufficient time in patient scheduling to allow focused recording of all data required for the study; and does not anticipate retiring, selling the practice, or moving during the study. Signed, written informed consent was required before inclusion in the trial. All participants included in this prospective observational study had Class I or mild Class II malocclusion with mild to moderate crowding or spacing in the maxillary and mandibular dental arches (nonextraction cases). Interproximal enamel reduction was performed as prescribed in each patient's virtual treatment plan. The average treatment time was 10 ± 5 months. The sample considered a total of 2716 teeth that were analyzed overlapping the real post-treatment .stl file obtained with the final intra-oral scan to the planned post-treatment .stl file obtained exporting the final stage of the virtual setup. Every virtual treatment plan was designed by orthodontists with a huge and renewed experience in Invisalign treatments. While in the private practices the treatment was directly conducted by 5 expert orthodontist (mean age 45.6 ± 8.2) who controlled the patient at every appointment, in the University setting the treatment was conducted by 5 post-graduate students at the last year of their program (mean age 26.4± 1.4). Control appointments were fixed at 6 weeks interval in both the University and the private settings. Posttreatment digital models and final virtual treatment plan models were exported from ClinCheck® software as stereolithography files and subsequently imported into Geomagic Qualify software (3D Systems(r), Rock Hill, South Carolina, USA), in order to compare individual tooth positions between digital models of each patient. The dental arches were superimposed using the landmark-based method and the surface-based method (Best Fit Alignment). So that the differences between the tooth positions could be calculated, 3 reference planes were identified on the virtual treatment plan model. Differences between the actual treatment outcome and the predicted outcome were calculated and tested for statistical significance for each tooth in the mesial-distal, vestibular-lingual, and occlusal-gingival directions, as well as for angulation, inclination, and rotation. Differences greater than 0.5 mm for linear measurements and 2° for angular measurements were considered clinically significant. In addition, the statistical significance of categorical variables was tested for each previously calculated difference in tooth movement.
This in vivo comparative study will evaluate the changes in the mandibular dimensions and the glenoid fossa after skeletal class III subjects' therapy by chincup appliance and compare it with an untreated class III control group. Pre and post-treatment low-dose computed tomography images will be taken before and after achieving positive overjet and undergoing 16 months of active treatment/ observation. Dimensional and volumetric changes in the mandible, condyles, and glenoid fossa will be calculated and compared to those observed in the control group.
Thirty-eight patients requiring extraction of maxillary first premolars and maximum anchorage to retract the upper anterior teeth will participate in the study. They will be divided randomly into two groups: electrical group and control group. In each group, en-masse retraction will be initiated after completion of the leveling and alignment phase via closed nickel-titanium coil springs applying 250 g of force per side, Mini-implants will be used as an anchor unit. The dental changes will be detected using dental casts and to evaluate the rate of teeth retraction.
60 patients needed therapeutic extraction of the maxillary first premolars with subsequent retraction of the maxillary canines were divided to randomly three groups: (1) PRP group: Received PRP injections, (2) I-PRF group: Received I-PRF injections, (3) Control group: conventional treatment with no injections. TPAs were used as an anchor unit. Coil springs were used to distalize the upper canines on 0.019 x 0.025-inch stainless archwires. Alginate impressions and dental casts of the maxillary arch were done at five-time points over a 4-month follow-up period. The amount of canine movement, canine rotation, and anchorage loss were measured on three-dimensional digital models superimposed on the rugae area.
There's a scarcity in literature concerning the comparison of the effectiveness of brackets in its torque and tip ability, the time takes for leveling and alignment comparing between different orthodontic bracket brands, and its effect on the rate of tooth movement. The purpose of this study is to determine, In orthodontic patients with Class I molar relation and teeth crowding, in which different bracket brands will be compared.
Thirty two patients requiring extraction of maxillary first premolars and en-masse retraction of upper anterior teeth will participate in the study. They will be divided randomly into two groups: electrical group and control group. In each group, en-masse retraction will be initiated after completion of the leveling and alignment phase via closed nickel-titanium coil springs applying 250 g of force per side, Mini-implants will be used as an anchor unit. The overall retraction duration will be calculated. The skeletal, dental and soft tissue changes will be detected using panoramic and lateral cephalometric radiographs which will be obtained pretreatment, pre and post en-masse retraction of the anterior teeth.
Class II malocclusion presents a major and common challenge to orthodontists. Treatment of Class II malocclusion is one of the most investigated and controversial issues in contemporary orthodontics because of the extensive variability of treatment strategies addressing the morphological characteristics of this malocclusion. The therapeutic approaches include tooth extractions, orthopedic appliances and extraoral or intraoral distalizing appliances. Maxillary molar distalization is one of the most common strategies to correct Class II molar relationship and it is commonly indicated for patients with maxillary dentoalveolar protrusion or minor skeletal discrepancies. One of the most used devices is Pendulum appliance, introducted by Hilgers in 1992. In the last decades, the orthodontic treatment with removable clear aligners has become an increasing common choice because of the growing number of adult patients who ask for aesthetic and comfortable alternatives to conventional fixed appliances. In 1997, Align Technology (Santa Clara, Calif) adapted and incorporated modern technologies to introduce the clear aligner treatment (CAT). Only few investigations have focused on the predictability of orthodontic tooth movement with CAT. A systematic review by Rossini et al. pointed out that among the dental movements analyzed in 11 studies, the bodily distalization was the most predictable. Clinicians can consider the use of aligners in treatment planning for adult patients requiring 2 to 3 mm of maxillary molar distalization. However, a detailed analysis of the skeletal and dental changes that compared pendulum appliance and clear aligners in class II treatment is still lacking. On the basis of these considerations, the aim of the present prospective study was to analyze the effects on vertical dentoskeletal changes following maxillary molar distalization with pendulum and full fixed appliances and clear aligners.
Teenage children and adults often undergo orthodontic treatment each year to improve their dental esthetics and chewing function. One common problem they present with is having a small maxilla compared to the mandible. The standard of treatment to correct this issue is to expand the maxilla using either a tooth-anchored expander, a bone-anchored expander, or braces. Unfortunately, these treatment options can sometimes result in a loss of gum tissue and supporting structures of the teeth. Certain patients, especially ones that have thin gum tissue, are at a higher risk of this gum tissue loss. Orthodontic treatment for these patients will expand their jaw, causing further pressure on already thin gums. An increasingly common treatment to prevent this is to proactively modify patient's thin tissue surgically prior to their orthodontic treatment so they can withstand the tooth movement. The gold standard of doing this surgical intervention consists of harvesting a connective tissue from the palate which is not well tolerated by the younger population. Our study will evaluate the use of a biomaterial substitute instead of harvesting the patient's own tissue to thicken the gingival tissues. Surgical healing, patient satisfaction, pain index, as well as tissue contour post orthodontic treatment will be assessed thoroughly. This study will help us understand: 1) if biomaterials can be a substitute for traditional autogenous gum grafts to help thicken the patient's gum tissue prior to orthodontic treatment, and 2) if they are able to withstand the pressure of orthodontic movement. This will be the first long-term study of this kind.