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IRCT201204289569N1 IRCT 2012-06-27 Vice Chancellor for Research of Tabriz University of Medical Sciences The Influence of Surface Roughening of Orthodontic Miniscrews on Their Clinical Success Rate The Comparison of Clinical Success Rates of Surface Roughened Orthodontic Miniscrews with Conventional One 2012-05-09 anticipated 60 Complete https://irct.ir/trial/10146 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: The operator inserting the miniscrews has two miniscrew boxes. Box “A” and box “B”. Only miniscrews in box “A” have been roughened. He knows that the miniscrews of one of the boxes have been roughened, but he does not know which one of the boxes has the roughened miniscrews. He just inserts the miniscrews of box “A” on the right side and the miniscrews of box “B” on the left side in the odd number patients (according to referral). Conversely, in the even number patients, he places the miniscrews of box “B” on the right side and the miniscrews of box “A” on the left side. All the patients know that the miniscrew on one of the sides is roughened, but they do not know which one of them is roughened. Therefore, the patients and the operator who inserts the miniscrews do not know which one of the inserted miniscrews is roughened; This study as aresult is a double-blind clinical trial. 2-3 Orthodontic Anchorage Procedures. Sixty miniscrews manufactured by Jeil Company, with a diameter of 1.6mm and a length of 10mm will be randomly divided into case and control groups. The case group samples will be roughened by sandblasting and acid etching. Surface roughening will be carried out as follows: First of all, the miniscrews will be polished and sandblasted with aluminum oxide particles under the pressure of 4MPa. Then irrigation will be carried out with acetone, 75% alcohol ethylic, and distilled water in an ultrasonic cleanser for 15 minutes, in turn. Subsequently the samples will be put in a solution of hydrofluoric acid with a concentration 0.11 mol per liter and nitric acid with a concentration of 0.09mol per liter at room temperature for 10 minutes. Then the samples will be maintained in an oven at 50°C for 24 hours. Subsequently the samples will be put into a solution of hydrochloric acid with a concentration of 5.8mol per liter and sulfuric acid with a concentration of 8.96mol per liter at 80°C for 30 minutes. Finally, an oven at 50°C will be used for drying the miniscrews for 24 hours..
public Amir Mohammadi
Department of Orthodontics, Tabriz Dental Faculty, Tabriz University of Medical Sciences,Golgasht St
Tabriz Iran (Islamic Republic of) 5166614713 +98 411335596 amirortho@gmail.com Department of Orthodontics of Dental Faculty of Tabriz University of Medical Sciences scientific Amir Mohammadi
Department of Orthodontics, Tabriz Dental Faculty, Tabriz University of Medical Sciences,Golgasht St
Tabriz Iran (Islamic Republic of) 5166614713 +98 41 1329 4312 amirortho@gmail.com Department of Orthodontics of Dental Faculty of Tabriz University of Medical Sciences Iran (Islamic Republic of) Inclusion criteria: A treatment plan to insert miniscrews on both sides of maxilla between the second premolar and the first molar. Exclusion criteria: Any disease compromising bone quality like osteoporosis, osteopetrosis, osteomalasia. 10 years 50 years Both T84.9, Z45 Unspecified complication of internal orthopaedic prosthetic device, implant and graft; Adjustment and management of other implant devices Treatment - Devices Sixty miniscrews manufactured by Jeil Company, with a diameter of 1.6mm and a length of 10mm will be randomly divided into case and control groups. The case group samples will be roughened by sandblasting and acid etching. Surface roughening will be carried out as follows: First of all, the miniscrews will be polished and sandblasted with aluminum oxide particles under the pressure of 4MPa. Then irrigation will be carried out with acetone, 75% alcohol ethylic, and distilled water in an ultrasonic cleanser for 15 minutes, in turn. Subsequently the samples will be put in a solution of hydrofluoric acid with a concentration 0.11 mol per liter and nitric acid with a concentration of 0.09mol per liter at room temperature for 10 minutes. Then the samples will be maintained in an oven at 50°C for 24 hours. Subsequently the samples will be put into a solution of hydrochloric acid with a concentration of 5.8mol per liter and sulfuric acid with a concentration of 8.96mol per liter at 80°C for 30 minutes. Finally, an oven at 50°C will be used for drying the miniscrews for 24 hours. Detection of mobility in the miniscrews. Timepoint: Six weeks and six months after insertion of the miniscrew. Method of measurement: Check list to record the mobility. Amount of removal torque of the miniscrews. Timepoint: Six months after insertion of miniscrews. Method of measurement: Torque measurment device (Orthonia, JEIL Company). Vice Chancellor for Research of Tabriz University of Medical Sciences Approved 2012-04-05 Ethics Committee of Tabriz University of Medical Sciences Ethics Committee of Tabriz University of Medical Sciences,Vice Chancellor for Research of Tabriz University of Medical Sciences,Tabriz University of Medical Sciences, Golgasht street, Tabriz Tabriz Iran (Islamic Republic of)