John S. Schrenker, DMD John S. Schrenker, DMD, is a general dentist and the General Practice Residency Director, specializing in multidisciplinary care, restorative dentistry and complex and medically compromised patients. He is skilled at multidisciplinary treatment planning and treatment of complex dental restorations with implants. Dr. Schrenker did is Doctor of Dental Medicine at University of Pittsburgh School of Dental Medicine and completed his residency in Dental General Practice at Montefiore Hospital in Pittsburgh, Pennsylvania. Dr. Schrenker believes that oral health is crucial to one’s overall health and that prevention is the key to avoiding dental disease. He sees patients ages 12 and older.