• 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

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...

July 21st, 2016 | No comments

Announcing Tri-Valley Orthodontics Patient Rewards Program!

We’re excited to give you a sneak peak of Tri-Valley Orthodontics Patient Rewards Program & Kid’s Club! Our orthodontic team...

Schedule your complimentary consultation today.