A native of San Antonio, Dr. Michael Casillas graduated from Central Catholic High School and attended the University of Texas of San Antonio. Dr. Casillas obtained a Degree in Dentistry from the University of Texas Health Science Center Dental School of San Antonio in 1989. He completed related training through externships in oral and maxillofacial surgery and preprosthetic surgery at the University of Texas Health Science Center of San Antonio. He completed a residency in general practice and a residency in oral and maxillofacial surgery at Denver General Hospital in Colorado. Dr. Casillas is a Diplomate of the American Board of Oral and Maxillofacial Surgery.
Dr. Casillas has been associated with San Antonio Surgical Arts since the completion of his residency programs. He is a member of the American Association of Oral and Maxillofacial Surgeons, the American Dental Association, the Texas Society of Oral and Maxillofacial Surgeons, the Texas Dental Association, the Southwest Society of Oral and Maxillofacial Surgeons, and the San Antonio District Dental Society. In addition, Dr. Casillas serves his community through his active involvement in the Texas Cavaliers.