24531 Trabuco Rd., Suite H, Lake Forest, CA 92630 If you have periodontal disease or another condition, Dr. Marianne Tanios may perform an oral biopsy to get a more exact diagnosis of your condition. By determining the precise bacteria in your mouth, our dentist can then create a treatment plan tailored to your needs and provide you with a more effective overall treatment. Call OC Splendid Smiles at 949-855-3368 to schedule an appointment and learn more about oral biopsy in Lake Forest, California.