Evaluation the Efficacy of Rapid and Slow Maxillary Expansion in Posterior Crossbite Treatment Using Cone Beam Computed Tomography
Evaluation the Efficacy of Rapid and Slow Maxillary Expansion in Posterior Crossbite Treatment Using Cone Beam Computed Tomography
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.
Unilateral or bilateral posterior crossbite (PXB) is a common malocclusion. In recent decades, RME has gained preference as the treatment of choice for PXB. However, the side effects, such as reported pain, relapse of the expansion, tipping of the molars, bone loss, gingival recession, and root resorption, have lead some clinicians to prefer SME.
In this study the investigators will treat PXB using two techniques, RME and SME. Patients will be divided into two groups (a technique in each group) to evaluate the efficacy of each one using cone beam computed tomography.
RME group: A Hyrax appliance modified as McNamara will be applied. SME group: A removable appliance with central expander will be applied. In order to evaluate the changes occurring, two CBCT radiography will be taken for every individual: first, before treatment, second, after three months of retention for RME group and one month of retention for SME group
Inclusion Criteria:
Exclusion Criteria: