prostaglandin £j (pge-^) and indomethacin, a nonstroidal antiinflammatory drug, were separately administered during ortliodontic tooth movement in rats. at the beginning, an orthodontic appliance was placed and activated in male albinos rats. in tlie first examination, the experimental group received submucosal injections of pge-y (10 mg/kg/day) near the first maxillary riglit molars, and alcoh...

introduction: the ability to accurately measure forces produced by orthodontic appliances during orthodontic treatment is desirable. the aim of the present study was to compare forces measured by mechanical formulae designed with a software program and those experimentally measured by a dynamometer to find a scientific way to determine the exact amount of activation needed for applying a force ...

this report presents a case of 10 years old girl who was referred to the pediatric dentistry clinic sustaining a severe trauma led to crown fracture and intrusive luxation of immature maxillary incisors. antibiotic therapies were initiated at first visit, and after surgical exposure both intruded and extruded teeth were endodontically treated by calcium hydroxide. orthodontic repositioning was ...

o bjectives: this study sought to assess distal and lateral forces and moments of asymmetric headgears by variable outer bow lengths. materials and methods : four 3d finite element method (fem) models of a cer- vical headgear attached to the maxillary first molars were designed in solidworks2010 software and transferred to ansys workbench ver. 11 software. modelscontained the first molars, thei...

objective: : root resorption is a complication of orthodontic treatment and till date, there is a dearth of information regarding this subject. the aim of this study was to determine the relationship between orthodontic force and genetic expression of tgf-β(as an inflammatory cytokine) using the rt-pcr technique in rats. moreover, realization of the level of gene expression may help in the diff...

Transparent tooth correction treatment is an esthetic alternative to traditional orthodontic treatment. Recently, attachments were introduced in transparent tooth correction treatments to improve the predictability of orthodontic movement. In order to optimize the attachment configuration, the force delivery system of attachments in orthodontic aligner treatment was analyzed. Based on mechanica...

OBJECTIVES The aim of this study was to investigate the effects of retraction force and anchorage reinforcement with orthodontic mini implants on occlusal force. MATERIALS AND METHODS A strain gauge was attached to the palatal surface of the maxillary right first molar on an en masse retraction model. RESULTS Occlusal forces were measured from this model, according to different retraction f...

distraction osteogenesis method (do) in bone lengthening and rapid midpalatal expansion have shown the great ability of osteognic tissues for rapid bone formation under distraction force and special protocol with optimum rate of one millimeter per day. periodontal membrane of teeth (pdm) is the extension of periostium in the alveolar socked. orthodontic force distracts pdm fibers in the tension...

INTRODUCTION The purpose of this study was to quantify the effect of moderate and severe orthodontic forces on calcitonin gene-related peptide (CGRP) expression in healthy human dental pulp. METHODS Thirty human dental pulp samples were obtained from healthy premolars in which extraction was indicated for orthodontic reasons. Before extraction, teeth were divided into 3 groups of 10 premolars...

Pulpitis, external root resorption, and pain may be experienced during orthodontic movement. The use of nonsteroidal anti-inflammatory drugs (NSAIDs) has been suggested to control these changes. The purpose of this study was to observe pulp-dentinal reactions, root resorption, tooth pain, and tooth movement after the application of a 4-ounce intrusive orthodontic force to human maxillary first ...