Focus Areas:   Biological Dentistry (Mercury-removal)  •   Preventative, Family & General Dentistry  •   Cosmetic Solutions  •   High-Tech Dentistry
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To schedule your appointment, please call 503-684-4174.
Meet the Doctors

Dr. Shepard DeLong is a third generation dentist and Portland native. He pursued post-doctorate education after graduating from OHSU and completed a General Practice Residency at The Queen's Medical Center in Honolulu. He has worked alongside and been mentored by some of the nation's leading dentists and specialists and has developed a holistic and biological health-centered philosophy that is shared with his patients using the most advanced technologies available today.

Dr. DeLong is a member of the International Academy of Oral Medicine and Toxicology (IAOMT) and is SMART certified for safe mercury removal. He is also a member of the International Association of Mercury Safe Dentists (IAMSD). He has been a past member of the American Dental Association and Academy of General Dentistry.

He enjoys spending time with his family, cooking, reading, practicing yoga and Vipassana meditation. Dr. DeLong still finds time to connect with nature while skiing, hiking, biking, surfing or kite-boarding.





Dr. Jeffrey Williamson has practiced dentistry in the Portland area since 1978. For more than 25 years, he has had a mercury-free dental office. A graduate of Loyola University School of Dentistry, he was an assistant professor at the Louisiana State University School of Dentistry and the University of Oregon Health Sciences Center. In addition, he attended the famous Las Vegas Institute for Advanced Dental Studies, where he learned the most advanced techniques in esthetic (cosmetic) dentistry.

To keep current with the latest dental technologies and methods, Dr. Williamson is an active member of the following academies and associations:

American Academy of Implant Dentistry
Academy of General Dentistry
American Dental Association
Oregon Dental Association
International Academy of Oral Medicine and Toxicology (IAOMT), which is dedicated to educating and treating patients with biocompatible materials and safely removing mercury fillings
• The Dental Organization for Conscious Sedation whose mission is to make sure that every patient has access to safe, comfortable, anxiety-free dental care.

Dr. Williamson completed a certification course of over three hundred hours of comprehensive training in Implant Dentistry presented by the Oregon Academy of General Dentistry with sponsorship from the American Academy of Implant Dentistry at Oregon Health Sciences University.

Staying healthy is good for everyone, so Dr. Williamson tries to maintain an active lifestyle. His hobbies and athletic activities include Hatha Yoga, Pilates, running, weight-resistance training, snow skiing and water skiing.
Centerpointe Dental