smiles on randolph - crown point, IN

Dr. chanbo Sim, DDS

Dr. Chanbo Sim has been practicing comprehensive dentistry in Indiana for over 30 years. As an active member of numerous professional dental organizations, Dr. Sim strives to stay up-to-date with the newest information and technology. With a dedication to patient safety and satisfaction, Dr. Sim is honored to be the chosen dentist for you and your family.

Dr. Sim, along with his dedicated team, are delighted to share his new practice with the community. Smiles on Randolph is a state-of-the-art dental spa facility built on Dr. Sim’s extensive dental knowledge. As a longtime dentist in the Crown Point, IN area, Dr. Sim has created a loyal following and yearns to grow his dental family to better serve the community.


With over 1,000 online reviews, Dr. Sim’s 5-star rating proves his dedication to consistent positive experiences for patients.


Dr. Sim continues to add new features and services to his practice, so patients like you can benefit from new treatments.


With over 30 years of experience, Dr. Sim has helped thousands of patients with a variety of dental issues.

meet dr. chanbo sim

As a family man with a beautiful wife and three children, I understand the importance of a positive dental experience for all. I’d love to welcome you to become a member of our dental family at Smiles on Randolph!

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dr. chanbo sim, dds

head of smiles on randolph

Dr. Chanbo Sim is a professional member of the American Dental Association, the Indiana Dental Association, the Northwest Indiana Dental Society, and the International Association of Orthodontics.

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Dr. Chanbo Sim, DDS

Words from

Charles H.

Review from google

Dr. Sim has a great bedside manner, down to earth, kind, and very easy to talk to. His technique is impeccable. It is not strictly business here. It is a family friendly type of establishment.

Cherie S.

review from google

Dr. Sim is not just a dentist, but an overall caring soul! I never thought my teeth could be fixed until I saw Dr. Sim. He not only gave me back a better beautiful smile, but also self confidence...which is priceless!!! I’ll never go anywhere else!

Stephanie T.

review from google

Dr. Sim and his team are the best. I felt very comfortable being in the office for my dental treatment. Professionalism and customer service remain at an all time high. As usual A+ service!

more about dr. sim

Dr. Chanbo Sim, DDS

Dr. Sim knew he wanted to become a dentist after watching a family friend create a cheerful atmosphere in his own dental office. Dr. Sim is committed to providing his patients and team with a family-first environment while prioritizing safety and patient satisfaction.

Many patients find comfort in his inclusivity, as he speaks English and Korean while staffing his office with members who speak Spanish, Polish, and Tagalong. Communication is no barrier for Dr. Sim and his team at Smiles on Randolph. In his spare time, Dr. Sim likes to run and is part of a local running club called The Calumet Striders. 

for you

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schedule your appointment now

Dr. Sim wants you to become part of his dental family at his new dental spa. Schedule your appointment today to receive the best care Indiana has to offer!