Meet Our Dental Providers

Felix Liou, D.D.S.
General Dentist

Dr. Liou says, “I was first attracted to dentistry when I worked as a dental assistant at the University of Washington during my undergraduate studies. That’s when I saw just how much dentistry could a positive impact someone’s life and well being. As a dentist, I enjoy the complexity of dentistry. I also enjoy forming relationships with my patients and educating them about the importance of their oral health.”

After graduating from the University of Washington, Dr. Liou received his Dental Degree from the USC University School of Dentistry. To keep abreast of cutting edge technology, he’s a member of the American Dental Association, the Washington State Dental Association and the Seattle-King County Dental Society.
Dr. Liou says, “Away from the office I enjoy running, fitness, and all types of sports.”


B.S., Biology–University of Washington
D.D.S.–USC School of Dentistry


American Dental Association Washington
State Dental Association Seattle
King County Dental Society


Judith Zantua, D.D.S.

General Dentist

Dr. Zantua says, “I always knew I wanted to pursue a career in the healthcare field because I wanted to help people. I chose dentistry because it combines science with artistry and at the same time demands compassion and understanding. I had an instructor in Dental School tell us “What we do can change lives.” I am always reminded of that when you get a patient that thanks you for allowing them to smile more often or the gratitude you receive when you get them out of pain. In the past 10 years that I’ve been practicing, that’s been the best reward.

“ After graduating from Washington University in St. Louis, Dr. Zantua was awarded her D.D.S. degree from the University of Iowa School of Dentistry. She is active in many organizations including the American Dental Association, the Washington State Dental Association and the Seattle-King County Dental Society.

Dr. Zantua says, “I will make any effort to provide you with the best care possible and as we work together to achieve a healthier smile and have fun time doing it.

In her free time Dr. Zantua enjoys playing her mandolin and guitar. She also likes to travel, hike and ski.


B.S.–Washington University in St. Louis
D.D.S.–University of Iowa School of Dentistry


American Dental Association Washington State Dental Association Seattle-King County Dental Society


Ramtin Amini, D.M.D., M.D


Oral & Maxillofacial Surgery

Dr. Amini’s philosophy is to provide outstanding care while working with his patients to establish a comprehensive treatment plan. As a Board Certified Oral & Maxillofacial Surgeon he appreciates his role in providing pain relief to his patients through often complex surgical procedures. He believes strongly in communicating with his dental colleagues to coordinate optimal care for his patients. Dr. Amini has a special interest in dental implants, bone grafting, and wisdom teeth extractions.

Dr. Amini received his D.D.S. from Tehran University and practiced as a general dentist in Iran for four years. After moving to America, he graduated from the Boston University School of Dental Medicine and was awarded his D.M.D. Dr. Amini then pursued his passion for surgery at Drexel University where he later received his M.D. Upon completion of a two year General Surgery residency, he continued his Oral and Maxillofacial Surgery residency training at Allegheny General Hospital. After fourteen years of post-graduate training, Dr. Amini moved to Washington State to practice the full scope of Oral and Maxillofacial Surgery. He’s a member of the American Association of Oral and Maxillofacial Surgeons among many others.

Away from his practice, Dr. Amini enjoys skiing, tennis, and relaxing with his family. 


D.D.S. – Tehran University School of Dental Medicine
D.M.D. – Boston University School of Dental Medicine
M.D. – Drexel University College of Medicine


American Association of Oral and Maxillofacial Surgeons; Pennsylvania Dental Association; Omicron Kappa Upsilon (Honor Dental Society); American Dental Association

Sara Howe, D.D.S., M.S


Dr. Howe says, “For me dentistry is a unique blend of science and art which allows me to improve peoples heath and self-image. It is rewarding to build relationships with patients throughout their treatment and share in their excitement when they discover their beautiful new smiles. I’m genuinely interested in my patients’ goals and concerns and I enjoy explaining their options and getting their input on their course of treatment.”

After graduating with a Biology degree from Baylor University, Dr. Howe received her D.D.S. from the University of Colorado School of Dental Medicine. She then proceeded to earn her M.S. and Orthodontics Certificate from the University of Iowa School of Dental Medicine. To stay aware of evolving technology, she’s a member of the American Association of Orthodontics and the American Dental Association.

In her free time, Dr. Howe can be found outdoors: hiking, biking, tennis and volleyball. She likes a good read and playing with her dog Riley.


B.S., Biology–Baylor University
D.D.S.–University of Colorado School of Dental Medicine
Orthodontics Certificate–University of Iowa School of Dental Medicine


American Association of Orthodontics American Dental Association

Tori Matthys, D.D.S., M.S.D.


Dr. Matthys says, “I see dentistry as the dual harmony of science and creativity. It gives you the opportunity to be a scientist and an artist all at once, with the final product being a healthy and fantastic smile!”   

“I’m trilled to be working with the Gentle Dental team, and to serve the community of Lakewood, Dr. Matthys says. “I like being involved in patients’ lives on a regular basis: we get to work with all kinds and types of people, see them at different times in their life over the course of their orthodontic treatment. It’s fun to watch their smile and their lives change one month after the other. It is a tremendous honor to be involved with people in this special way.”

After graduating from Loyola Marymount University, Dr. Matthys received her Dental Degree and her M.S.D. in Orthodontics from the University of Washington School of Dentistry. She’s a member of the many organizations including the American Association of Orthodontics, the Pacific Coast Society of Orthodontists and the Washington State Society of Orthodontists.

Dr. Matthys says, “Family is the most important thing for me. We spend a lot of time getting together for events, meals and outdoor activities. Hobbies I enjoy include working out–running, snowboarding and hiking. I’m newly interested in fishing and backpacking and look forward to our Northwest Summers! I also love to watch all kinds of sporting events and I look forward to the NBA in Seattle again!” 


B.S., Biology–Loyola Marymount University
D.D.S.–University of Washington School of Dentistry
M.S.D., Orthodontics–University of Washington School of Dentistry


Washington Association of Women Dentists Award
James and Joyce Oates Scholarship for clinical excellence   


American Dental Association, Washington Dental Association, American Association of Orthodontics, Pacific Coast Society of Orthodontists, Washington State Society of Orthodontists

About Gentle Dental Woodinville

Smiles last a lifetime, but only with the proper care that they deserve. At Gentle Dental Woodinville, our dentists and friendly staff will take the time to listen to your dental needs and concerns and are devoted to establishing long-lasting relationships with our patients to ensure a brighter and healthier smile for the ages. Gentle Dental Woodinville dentists understand the anxiety of visiting a dentist and believe a visit to your dentist should never be a chore. Whether you are in need of a regular visit, teeth cleaning, or advanced dental care, our dentists and staff will ensure your maximum comfort, while utilizing the most state-of-the-art facilities.

Gentle Dental Woodinville dentists are a group of dedicated and multidisciplinary professionals who have been caring for the dental needs of the Woodinville community. Our dentists and staff are proud members of the community and can be seen actively participating at local schools, health fairs and various other activities in Woodinville, WA. Gentle Dental Woodinville dentists are trusted in a wide variety of dental specialties, including cosmetic dentistry, regular examinations, professional cleanings, x-rays, veneers, sealants, fillings, crowns and bridges, teeth implants, dentures, root canals, teeth whitening, and braces and all aspects of general dentistry to make your smile healthy and radiant.

What are you waiting for? A beautiful smile is only a phone call away. Call today to schedule your first appointment with your dentist.

Gentle Dental

13317 NE 175th St Suite AA
Woodinville, WA 98072
Call: 425-654-2977
to schedule an appointment today

Get Directions

Office Hours:

Monday9:00 AM to 5:00 PM
Tuesday10:00 AM to 7:00 PM
Wednesday9:00 AM to 5:00 PM
Thursday10:00 AM to 7:00 PM
Friday7:00 AM to 4:00 PM
Saturday8:00 AM to 4:00 PM

New Patient Forms

Below are links to the new patient forms that you will be asked to complete during your first visit. Feel free to download them using the links below, and fill them out before your visit.

Adult New Patient Form (English)
Child New Patient Form (English)
Adult New Patient Form (Spanish)
Child New Patient Form (Spanish)