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12 Dentistry

Meet the Team at 12 Dentistry

At 12 Dentistry, our mission is to help improve your quality of life by improving oral health. Under Dr. Ron Ko’s guidance, our friendly and caring dental team works together to make each appointment the best dental experience you've ever had.

We look beyond our patients’ teeth and focus on nurturing strong, trusting relationships by delivering honest, transparent, personalized dental care. The moment you walk through our doors, you become a valued member of our extended dental family and can expect to be met with warmth, friendliness, and genuine concern for you and your well-being.

Because so many people struggle with dental anxiety, we cater to patients with dental phobias. Our dental team understands how deeply ingrained those feelings are and strive to help you feel safe and comfortable with us. With our kind and friendly approach, and the help of sedation dentistry, we will do everything possible to ensure you have a comfortable, stress-free dental visit. One reason Dr. Ko has invested so heavily in dental technology is that it streamlines your appointments and helps get you out of the dental chair faster. 

Our dental team is excited that you are considering us as your new dental home! Please take some time to learn more about who we are and what we offer, then call us to schedule an appointment.

Dr. Ron Ko

Dr. Ron Ko is originally from the far Pacific Northwest (PNW), Anchorage, Alaska. He moved down to Seattle to attend the University of Washington for undergrad and left the rain to obtain his dental degree at the Arizona School of Dentistry and Oral Health.

Dr. Ko is well versed in all areas of dentistry and is constantly partaking in continuing education to expand his knowledge of the field. He has extensive training in implants and root canals as well as fixed and removable prosthodontics (dentures, crowns, bridges). He is also very well connected with an elite group of local dental specialists (i.e. orthodontists, oral surgeons, endodontists, prosthodontists, periodontists) for any cases that may need additional love and attention. 

When Dr. Ko is not at his practice, he can be seen with his family outdoors at public parks, museums, and zoos. When he is not with his family, you'll find him with a group of friends watching football, basketball, or playing a round of golf. He enjoys traveling, learning about different cultures, and searching for tasty meals. 


Registered Dental Hygienist

Marcy has been a part of the 12 Dentistry team since 2001. Her well-rounded dental education includes training as a dental hygienist, dental assistant, and dental lab technician. Marcy loves her job because she enjoys developing personal connections with her patients.

Marcy was born and raised in Puyallup and attended Rogers High School. Outside of dentistry, she enjoys gardening and playing with her dog.


Office Manager/Insurance Coordinator

Teresa graduated from South Sound Community College, where she was president of the dental assisting program. She then went on to attend Pierce College, where she received her Associates of Science degree and started working in the dental field in 1981.

In her role as our office manager, Teresa finds it rewarding to help patients overcome their fear and anxiety; as our insurance coordinator, she is committed to helping patients optimize their insurance benefits and treatment plans.

Teresa is a native of Grapeview, Washington, where she grew up on saltwater boating and water skiing. She and her husband David love nature and the outdoors and enjoy traveling with a hiking destination in mind. In her free time, Teresa also enjoys cooking, entertaining, and reading historical novels.


Patient Coordinator

Colleen holds a Bachelor’s degree in communication and has been with 12 Dentistry since June 2020. As our patient coordinator, Colleen is one of the first smiling faces you’ll see when you arrive at 12 Dentistry for your appointment.

One of her roles is to schedule appointments and work alongside our financial coordinator. Colleen loves to greet patients as they arrive and create connections by getting to know them.  She always enjoys seeing familiar faces return and catching up with them is like catching up with old friends!

A native of Toms River, NJ, Colleen grew up close to the beach and definitely misses the ocean, but she has been in the PNW for 10 years and loves living here. Some of her favorite hobbies include weekend trips with her husband and pup, cooking and entertaining at home, woodworking and other creative projects, going to the gym, planning/organizing events, and of course, constant FaceTime calls with her family, most of who still live on the east coast.


Registered Dental Assistant

Sarah has been working in the dental field since 2007 and joined 12 Dentistry in June 2020. As a dental assistant, she enjoys taking time to help her patients feel comfortable and always loves to see familiar faces on their return visits.

Sarah currently resides in her hometown of Eatonville, Washington. Outside of dentistry, she loves spending time with her three children and animals (dog and chickens!), thrifting, being creative, and weightlifting.

A Healthy smile is just a click away.
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