Family, Cosmetic, & Sedation Dentistry, serving Western Pennsylvania for over 22 years. Get your Smile Certified at Keelan Dental. Keelan Dental Cosmetic, Family, and Sedation Dentistry. Dr. Keelan contributes to your health and happiness by providing you with dentistry that caters to your unique wants and needs, and that provides you with beautiful, lasting results. His goal is to create an environment in which his patients are always comfortable and at ease. When they walk out of his office, it will be with a lighter step and a healthier, brighter looking smile.