Dr. Renger was born and raised in Hallettsville, Texas and has been a resident of Houston since 1970. He attended the University of Texas and the University of Houston where he earned a Bachelor of Science degree. He received his D.D.S. degree from Baylor College of Dentistry in Dallas and practiced family dentistry for one year. He then entered a two-year residency at the University of Texas Dental branch in Houston where he received a Master of Science degree and was certified in the specialty of orthodontics. He has been in the exclusive practice of orthodontics since 1973.