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Ken M. Akimoto, DDS, MSD



Dr. Akimoto is a board certified periodontist by the American Board of Periodontology. He is also an affiliate faculty at the University of Washington, Department of Periodontics.


He is a graduate of the Tokyo Medical and Dental University and has his Master of Science in Dentistry from the University of Washington. He is a multiple Seattle Magazine Top Dentist award winner and is regularly called up for industry lectures and education workshops on his state-of-the-art periodontal techniques. Dr. Akimoto has authored several publications and been the recipient of prestigious awards, including:

  • Osseointegration Foundation Dental Implant Research Grant
  • California Society of Periodontists Outstanding Implant Research Award


By combining his experience in restorative dentistry and periodontics, Dr. Akimoto is able to provide patients with exceptional care each and every time.

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Luciana Safioti, DDS, MSD



Dr. Luciana Safioti is a Board-certified Periodontist by the American Academy of Periodontology, part-time Clinical Assistant Professor at the University of Washington.


Dr. Safioti  graduated from the University of Sao Paulo in Brazil and earned her Graduate Certificate in Periodontics and Master of Science in Dentistry from the University of Washington. She practiced eight years of general dentistry in Brazil and was a full-time faculty member teaching Periodontics at Nova Southeastern University in Florida for 3.5 years.


Dr. Safioti was awarded with the prestigious Clinical Impact Award for her novel clinical research on peri-implantitis, and with the Educator of the Year Award, both from the American Academy of Periodontology.


Stephanie Yeung, DDS

Prosthodontics & Implant Specialist


Dr. Stephanie Yeung is a distinguished prosthodontist with an impressive academic background. She graduated with a degree in Integrative Biology from the University of California, Berkeley, and earned her Doctor of Dental Surgery and certificates in prosthodontics from the renowned Herman Ostrow School of Dentistry at the University of Southern California.


Dr. Yeung’s contributions to the field of dentistry are globally recognized, with her research and expertise in prosthodontics, implant dentistry, and digital dentistry being featured in high-impact, peer-reviewed publications. As a private practice owner in Los Angeles for nearly a decade, Dr. Yeung established a reputation for providing personalized care that helped transform her patients’ smiles and, in turn, their lives. She has since traded in the beach and palm trees for family life and better coffee in Washington.


Dr. Yeung brings her expertise to 425 Dental. She values the opportunity to get to know her patients, allowing her to provide more individualized care. Her passion for building self-confidence in her patients through smile transformations is evident in her approach to dentistry. Dr. Yeung’s expertise and dedication make her a trusted and valued member of the dental community.

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Andrew Johnson, DDS



Dr. Andrew Johnson attended the University of Nebraska, Medical Center- College of Dentistry in Lincoln, Nebraska from August 1986 through April of 1990. In August of 1990 he began his specialty training in Endodontics at the University of Illinois in Chicago. He received his Endodontic degree in May 1992.


He is currently the president of the John Smith Study Club for the second year in a row and also attends two other study clubs each month. He has kept his skills up to date by completing many continuing education courses each year throughout his career. He is a member of the American Association of Endodontics, American Dental Association and has applied to the American Board of Endodontics. Dr. Johnson is an Endodontist who enjoys educating his patients as well as treating them.


His most satisfying aspect of the practice is treating and caring for his patients. He likes to put himself in the patient’s position and treat them as he would himself, which is how he conducts all aspects of his practice. Making all patients comfortable, getting them out of pain and creating lifelong relationships is his goal for his practice.


Dr. Johnson is married with three children and two grandchildren, and he enjoys spending time with them. His hobbies include a number of activities, golf and basketball are among his favorites.

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Brian Cheung, DDS, MD

Oral Surgeon


Dr. Cheung began his dental career at the University of Washington, where he received his Bachelor of Science in Biochemistry. Once graduated, he moved to Ann Arbor to continue his education at the University of Michigan, where he earned his Doctor of Dental Surgery. After receiving his DDS, Dr. Cheung completed his MD degree from the University of Kentucky, and completed a 6-year residency through the University’s Oral & Maxillofacial Surgery program where he obtained extensive training in a variety of medical and dental diseases.


Dr. Cheung values the dental community and serves a significant role by belonging to a number of professional organizations, including the Washington State Dental Association, the American Dental Association, the American Medical Association, and the American Association of Oral & Maxillofacial Surgeons.


As a lifelong Washington resident, Dr. Cheung is a Seattle sports enthusiast and enjoys hiking, traveling, playing a round of golf, and spending time with his family!

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If you are experiencing pain, especially pain that is growing worse over time, please call our office at (425) 392-4600, option 4, or text (425) 392-4600 for assistance in booking your appointment. We will be happy to assist you in finding a time to visit our office as soon as possible and do anything we can to help.