Welcome to the office of Dr. Bair A. Kirk, your friendly, professional orthodontic specialist in Petaluma, California. At Kirk Orthodontics, we provide exceptional and affordable care using state-of-the art orthodontic treatment options, including the revolutionary Invisalign system. We provide braces and retainers for patients of all ages, from children to adults, who want dazzling, beautiful smiles. For more than 16 years we have been proud to provide thousands of Sonoma and Marin County patients with top-notch orthodontic care.