Phone. 480-497-0509. Hours. Monday-Thursday: 7:30 a.m.-5:00 p.m. Friday: 8:00 a.m.-12:00 p.m. Thank you for visiting Rollins & Petersen online! We have provided families with quality orthodontics in Gilbert and the surrounding areas of Tempe, Chandler, and Apache Junction, Arizona, for over 30 years. Drs. Treven Rollins and Alan Petersen ....