View clinical trials related to Orthodontic Space Closure.
Filter by:The aim of this study is to compare en masse (EM) and two-step anterior teeth retraction (TSR) evaluated by means of three-dimensional images superimposition. Thirty-two adult patients with bimaxillary protrusion planed for treatment with four first premolar extractions will be enrolled. All patients will be randomly allocated in a 1:1 ratio to either EM (n=16) group or the TSR (n=16) group. Cone bean computed tomography will be taken before and after anterior retraction. A blind observer will construct separate 3D models for maxillary and mandibular surfaces using the anterior cranial fossa to register models of before and after space closing. Quantitative assessment of posterior anchorage loss and amount of anterior teeth retraction are the main outcomes. The secondary outcomes are the inclination of the molars, canines and incisors.
Gingival Crevicular Fluid samples will be collected using periopapers after accelerated tooth movement technique, results will be assessed with biomarkers levels done using ELISA Assays
The purpose of this trial is to study and compare two different anchorage techniques. Adolescent patients in need for orthodontic treatment are randomized into Group A and B. Both groups are treated with extractions of the maxillary first premolars and fixed appliance. Anchorage is reinforced by miniscrews in Group A and by molarblock in Group B. The hypotheses are: - that placement of miniscrews does not cause more pain or discomfort than premolar extractions - that molarblock provides increase of anchorage - that miniscrews have a better anchorage capacity than molarblock - that miniscrews are more cost-efficient than conventional anchorage techniques