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IRCT20170723035238N3 IRCT 2021-12-11 Tabriz University of Medical Sciences the comparison of the effects of traditional twin block andclear twin block the comparison of the clinical and muscular effects of traditional twin block andclear twin block:a randomized clinical trial 2021-10-25 anticipated 60 Complete https://irct.ir/trial/60284 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Other, Purpose: Treatment, Randomization description: numbered, sealed, opaque envelope (SNOSE) in this allocation system the researchers use mate envelopes. the number of the envelopes is equal with the number of the patients in each group. then the envelops are gathered in the box .for each patients one envelope will be selected randomly and the group ( case or control ) will be selected in this way. N/A skeletal class II. Intervention 1: Intervention group: clear twin block. Intervention 2: Intervention group: traditional twin block. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is no decision has been made regarding to data release
public Ahmad Behroozian
Tabriz / Azadi st. / gulgasht st. / Central building of Tabriz medical university
Tabriz Iran (Islamic Republic of) ۵۱۶۳۹۱۶۷۳۷ 004133347635 ahmadbehroozian@gmail.com Tabriz University of Medical Sciences scientific Ahmad Behroozian
Tabriz / Azadi st. / gulgasht st. / Central building of Tabriz medical university
Tabriz Iran (Islamic Republic of) ۵۱۶۳۹۱۶۷۳۷ +98 41 3334 7635 ahmadbehroozian@gmail.com Tabriz University of Medical Sciences Iran (Islamic Republic of) Iran (Islamic Republic of) the patients should be in the growth spurt stage. skeletal class II div 1 informed consent of the patient the willingness of the patient and parents for the treatment the presence of suitable teeth for thee retention of the appliance 11 years 14 years Both lack of the cooperation of the patient in follow up recalls lack of oral hygiene lack of the cooperation of the patient in restoration of decayed teeth before beginning of orthodontic treatment M26.212 Malocclusion, Angle's class II Treatment - Devices Treatment - Devices Intervention group: clear twin block Intervention group: traditional twin block Correction of jaw relationship. Timepoint: 6 months later. Method of measurement: cephalometery. Improvement in muscle function. Timepoint: 1, 3 and 6 month later. Method of measurement: surface electromyography. Tabriz University of Medical Sciences Approved 2021-10-25 •Ethics committee of Tabriz University of Medical Sciences Tabriz / Azadi st. / gulgasht st. / Central building of Tabriz medical university Tabriz East Azarbaijan Iran (Islamic Republic of)