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TREATMENT EFFECTS OF R-APPLIANCE IN VERTICAL GROWING PATIENTS-CASE SERIES Rahman Showkatbakhsh DDS, PhD, Associate Professor Department of Orthodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran CV Prof. Rahman Showkatbakhsh (DDS) has finished his post-graduate training in the school of dental and oral surgery, Colombia University, in New York City in 1981. He has established the first post-graduate program in orthodontics in school of dentistry, Shahid Beheshti medical sciences university. Currently, he is associate professor of the same orthodontic department and director of Orthognathic surgery fellowship. Questions What was the mean age of the patients in this study? q a. 23 years; q b. 18 years; q c. 28 years; q d. 10.6 years. SNB significantly increased from 72.8° to? q a. 76.8° q b. 76° q c. 75° q d. 77° The Jarabak index increased by? q a. 1% q b. 1.5% q c. 1.7% q d. 2% Was R-appliance successful in moving the mandible forward? q a. Yes, in vertical growth pattern patients without proclination of the lower incisors. q b. Yes, in horizontal growth patterns; q c. Yes, with proclinati