Nasrin Farhadian

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INTRODUCTION Even with advances in materials and techniques, demineralization around brackets during orthodontic treatment continues to be a problem. The purpose of this in-vivo study was to evaluate the effect of a fluoride varnish on enamel demineralization adjacent to bonded brackets. METHODS Fifteen patients who needed at least 2 premolars extracted(More)
OBJECTIVE The aim of this study was to investigate three-dimensional molar displacement after distalization via miniscrews and a horizontal modification of the trans-palatal-arch (TPA). METHODS The subjects in this clinical trial were 26 Class II patients. After the preparation of a complete set of diagnostic records, miniscrews were inserted between the(More)
OBJECTIVE This study was designed to evaluate the effect of argon laser irradiation on development and progress of enamel demineralization around orthodontic brackets. MATERIALS AND METHODS Fifty caries-free, intact human premolars were randomly assigned to one of the following five equal groups: Groups 1 (control) and 2: The brackets were bonded using(More)
This article reports on a patient with severe maxillary and mandibular crowding treated by both expansion and extraction treatment. Two surgical procedures, surgically assisted palatal expansion and a mandibular midline osteotomy, were performed in sequence for skeletal expansion. A hybrid appliance, consisting of a Hyrax screw and 2 miniplates, was used in(More)
OBJECTIVES After maxillary expansion, a long period of retention is necessary to prevent early relapse. Therefore, it is beneficial to accelerate bone formation in the expanding midpalatal suture to reduce relapse. This study was designed to evaluate the effect of dietary vitamin C on osteogenesis of rat midpalatal suture during expansion. MATERIALS AND(More)
OBJECTIVES This study aimed to assess the effect of head position on the accuracy of transverse measurements of the maxillofacial region on CBCT and conventional posteroanterior (PA) cephalograms. The second objective of this study was to find skull positions with the greatest and smallest effect on transverse measurements in the maxillofacial region. (More)
Introduction: Many patients seeking orthodontic treatment already have incipient enamel lesions and should be placed under preventive treatments. The aim of this in vitro study was to evaluate the effect of CPP-ACP paste and CO2 laser irradiation on demineralized enamel microhardness and shear bond strength of orthodontic brackets. Methods: Eighty(More)
Article Incorrect patient positioning and the resultant image distortion occur in many radiographic examinations. This study aimed to assess the effect of tilting, rotation and tipping of the head on the accuracy of maxillofacial transverse measurements made on cone beam computed tomography (CBCT) scans. The CBCT scans were obtained in central position of(More)
OBJECTIVES Bone remodeling occurs during orthodontic treatment; this process enables tooth movement. Many factors can affect bone remodeling at the cellular level, such as nutritional supplements that can affect tooth movement. The present study was designed to evaluate the effect of dietary vitamin C on orthodontic tooth movement in rats. MATERIALS AND(More)
Replacement of the impacted maxillary canines with implants is a great challenge for all dentists. Adequate implant space, sufficient space between the roots, alveolar bone bed, thin labialgingiva and the guiding role of canine in a mutually protected occlusion make the choice of implant position with proper diameter more difficult. In this article we(More)