View clinical trials related to Posterior Crossbite.
Filter by:Rapid palatal expansion aims at skeletally correcting the transverse maxillary deficiency by applying forces to separate the mid-palatal suture. In adult patients, the separation of the mid-palatal suture may not be possible due to its increased interdigitation. Miniscrew-assisted rapid maxillary expansion (MARPE) was proposed to transmit the forces directly to the mid-palatal suture through palatal miniscrews in addition to the anchor teeth. However, some non-growing patients may not respond favorably to MARPE. Hence, the use of corticopunctures as an adjunct to MARPE was recently proposed to overcome the increased resistance of the sutures in adult patients. The study aims to assess and compare the skeletal and dental effects of miniscrew-assisted rapid palatal expansion with and without corticopunctures in non-growing patients.
study will be directed to evaluate two approaches of microosteoperforations during skeletally anchored maxillary expansion
The force exerted by the rapid maxillary expansion (RME) appliances provides expansion of the transverse dimension by splitting of the midpalatal suture. This expansion results in three-dimensional (3D) changes in maxillary position which also effects circummaxillary surrounding structures. The aim of this randomized clinical trial (RCT) was to evaluate the effects of tooth-borne and tooth-bone-borne rapid maxillary expansion (RME) on soft tissue with stereophotogrammetry.
Miniscrew-supported maxillary expanders provide advantages over conventional tooth-supported expanders. However, there is no consensus in the literature regarding their activation protocol. The purpose of the clinical trial is to evaluate and compare the effects of slow and rapid activation rates of miniscrew-supported expanders on the skeletal changes, dento-alveolar changes and the pain experience.
This study will assess the dentoalveolar effects and impact on quality of life of two types of maxillary expanders in orthodontic patients with permanent dentition, from 12 to 16 years old. Half of participants will be treated using the Hyrax expander, while the other half will use the mini Hyrax expander. The null hypothesis is that there is no difference between dentoalveolar effects and impact on quality of life of the two protocols.
The aim of this study is to evaluate and compare the effect of rapid maxillary expansion with and without microosteoperforation in patients with skeletal maxillary constriction.Theoretically, the force generated by the activation of the Hyrax expander leads initially to the compression of the periodontal ligament, bending of the alveolar bone, and tipping of the anchor teeth. This in turn contributes to the unfavorable changes in the supporting tissues; such as root resorption, buccal crown tipping, reduction of buccal bone thickness, marginal bone loss and alveolar bone fenestration and dehiscence. In this trial, it is assumed that by reducing the cortical bone resistance, using micro-osteoperforation (MOP), the alveolar bone bending and buccal tipping that usually occur during expansion will be reduced and thus facilitating the bone expansion.
This study will evaluate the efficacy of rapid maxillary expansion (RME) and slow maxillary expansion (SME) in treating posterior crossbite using cone beam computed tomography. The study sample will consist of 32 patients who suffer from a skeletal posterior crossbite. The sample will be allocated randomly into two groups: RME group and SME group. The skeletal and dento-alveolar changes occurring after treatment will be assessed by using cone beam computed tomography(CBCT) radiographs.