View clinical trials related to Crowding, Tooth.
Filter by:The aim of the current clinical trial was to evaluate the effects of premolar extractions compared with non-extraction orthodontic treatment on the skeletal vertical dimension of the face. The null-hypothesis is that there is no difference in post-treatment skeletal vertical characteristics of normodivergent and hyperdivergent patients treated orthodontically with first premolar extractions compared with patients treated in non-extraction manner.
Early orthodontic pain is usually caused by the insertion of elastomeric separators to the mesial and distal of the tooth to be banded in order to create adequate space for proper placement. Recent studies have demonstrated that the pain reaches its peak at 24 hours and then gradually decreases within 7 days The intensity of this pain is sometimes perceived as extremely high to cause a significant number of patients to discontinue the treatment. Nonsteroidal anti-inflammatory drugs, which block the prostaglandin synthesis through inhibiting the cyclooxygenase activity, is one of the most common methods used to manage the orthodontic pain. It has been reported that these drugs decrease the orthodontic tooth movement rate, in addition to many systemic side effects such as gastric and duodenal ulceration, coagulation disorders, congestive heart problems and allergic effect. The application of low-level laser therapy (LLLT) also reported being efficient in accelerating orthodontic tooth movement and in alleviating orthodontic pain without any apparent side effects. LLLT is thought to reduce the pain by increasing the local blood flow, inhibiting the secretion of inflammatory substances, inducing the release of neurotransmitters, altering the conduction and excitation of peripheral nerves and stimulating the endorphins release. On the other hand, literature review on the effectiveness of LLLT in alleviating orthodontic pain observed after elastomeric separator placement (ESP) exhibited conflicting results. While LLLT was found to be effective in some studies, the others refuted its effectiveness. When studies on alleviating orthodontic pain observed after ESP were reviewed, it was determined that the effects of many drugs and LLLT were evaluated subjectively by VAS. Furthermore, only in one study, the effects of ibuprofen and LLLT were compared using PGE2 levels in GCF and VAS. Based on that, this study was aimed to compare the effects of ibuprofen and LLLT in alleviating orthodontic pain observed after ESP through IL-1β and SP levels in GCF and VAS.
This experimental study will evaluate the effect of corticision on accelerating the leveling and alignment of lower crowded incisors compared with the control untreated group using cone beam computed tomography. The study sample will consist of 26 patients with less than 6 mm crowding. The sample will be allocated randomly into two experimental groups. The brackets and passive SS wire will be applied with radiographic metal guides between each tooth to allow for accurate corticision site 2 mm below the gingival papilla and to prevent tooth roots injury. The dentoalveolar changes occurring after leveling and alignment of lower anterior teeth will be evaluated using CBCT radiographs, Frequency, degree of root resorption, and the incidence of bone dehiscence will be assessed in relation to initial situation.