• Welcome to Tri-Valley Orthodontics!
  • We're a two doctor family orthodontics practice
  • We're available every weekday & Saturdays by appointment

Meet Drs. Ko & Yoon

We’re a two doctor family-owned and operated orthodontics specialty practice dedicated to serving the families of our community. Dr. Ko completed his Masters in Engineering at UC Berkeley and his DDS & Orthodontics Certification from UPenn. Dr. Yoon is a Bay Area native and completed her Bachelors in Biology from UCLA & Pacific Union College, her DDS from the UCLA School of Dentistry and her Masters in Oral Biology & Orthodontics Certification from Loma Linda University.

What Sets Us Apart

Dr. Ko & Dr. Yoon, both specialists in orthodontics, started Tri-Valley Orthodontics from the ground up.They work as a team to evaluate, diagnose & treatment plan each case to deliver comprehensive orthodontic care for each patient. We believe that two minds are greater than one! We are known for our conservative straightforward approach – and will only recommend treatment when it’s absolutely necessary to start. We believe in the importance of your child’s education & schedule appointments around school hours.

Our Services

Our orthodontic consultations are always complimentary. We offer flexible 0% interest payment plans tailored to meet your needs and accept most PPO insurance plans. We provide a wide range of services for children, teens & adults – from Metal & Clear Braces to Invisalign & Lingual (Invisible) Braces. We believe in health first. We provide our patients with in-house digital x-rays & use only proven, premium materials to ensure optimal health, comfort & results that last a lifetime.

About Early Treatment (Phase I)

About Early Treatment (Phase I)

When should I bring my child in for their first visit? The American Association of Orthodontists recommends that children come...



Invisalign® takes a modern approach to straightening teeth, using a custom-made series of aligners created for you and only you....

All About Braces

All About Braces

We offer low-profile metal braces, ceramic (cosmetic) braces & lingual (invisible) braces.  Braces generally have two components: brackets and wires....

Recent News

October 21st, 2016 | No comments

Announcing our Patient Rewards Hub Double Points Winners!

Hope you’re all having an amazing start to the fall season! Although it does really still feel like the middle...

August 25th, 2016 | No comments

Thank you for a successful Patient Rewards Program Launch!

We had a great Patient Rewards Program Launch month, and want to welcome each of our patients and Kid’s Club...

August 9th, 2016 | No comments

Back to School – with Braces!

As August rolls around, we know that most of you are preparing to go back to school. If you just...

Schedule your complimentary consultation today.