Active clinical trials for "Malocclusion"

This investigation aims at distinguishing the subjects that react in a favorable way to the treatment protocol we propose for the Class II treatment

The study was directed to compare the treatment outcomes of subjects with Class II malocclusion who were treated with Herbst appliance before and after puberty.

Compare between bi-maxillary (maxillary and mandibular) posterior dento-alveolar intrusion and maxillary posterior dento-alveolar intrusion as regards open bite closure.

The investigator will assess the inverted sequence approach in the treatment of class III patient undergoing bimaxillary orthognathic surgery

Osteogenesis imperfecta (OI) is a rare inherited disorder that causes bones to break easily. Individuals with osteogenesis imperfecta break bones often and may have other problems, including hearing loss and pain and difficulty getting around. People with moderate to severe OI may also be diagnosed with dentinogenesis imperfecta (DI). DI is characterized by grey or brown teeth that may chip and wear down and break easily. People with DI may also have skull and neck defects. These patients may have severe teeth misalignment resulting in clinically significant chewing problems. Teeth misalignment in OI is very hard to treat because of the quality and quantity of bone. The overall goal of this study is to improve dental health to improve the quality of life of people with OI.

Bilateral sagittal split osteotomy (BSSO) is considered the main osteotomy design in corrective mandibular surgery, however abnormal anatomical configuration of the posterior mandible with rolled out inferior border and thin mandibular rami with cortically adherent inferior alveolar nerve may interfere with the utilization of this osteotomy. The aim of this study is to introduce a novel modification of the intraoral inverted L ramus osteotomy (ILRO) to overcome these limitations in mandibular setback surgery. preoperative CBCT was requested for virtual planning and fabrication of cutting and drilling guides. Cutting lines were outlined to be consisted of four cuts; lateral ostectomy to uncover and lateralize the inferior alveolar nerve (IAN), posterior cut run horizontally from the anterior border of the ramus to a point just above the mandibular foramen, two anterior vertical cuts run from the anterior end of the lateral ostectomy to the inferior mandibular border. The guide was removed and the osteotomy lines were completed then the mandibular setback was oriented and fixed using pre-bent plates osteosynthesis. Inferior alveolar nerve function was regained perfectly one year post-operatively. This procedure introduces a robust alternative to the BSSO osteotomy in some cases of mandibular setback surgery.

Stability of the orthodontic miniscrews placed in the mandible is still considered to bare higher risk of failure compared to other intraoral locations. The aim of our study was to determine the influence of the miniscrew size on their long-term stability, occurrence of oral mucosa inflammation and pain lasting over 48 hours after implantation.

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.

The aim of this study was to evaluate over eighteen months the clinical bonding failure and survival rates of the conventional bonding technique using the Transbond XT (3M Unitek, Monrovia, California, USA) and the RMGIC Fuji Ortho LC (GC Corporation, Tokyo, Japan) prepared with the V-prep. Therefore, one operator using the straight-wire technique bonded two hundred metallic brackets to upper and lower premolars of twenty-five patients requiring an orthodontic treatment. The randomized trial was a single-blind design in a split-mouth comparison. Each patient was randomly allocated one of the two bonding systems for each premolar on each side of the mouth. The bonding and rebonding techniques were standardized throughout the trial and bond failure was recorded each month for a period of eighteen months.

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.