Sienna Modern Dentistry and Orthodontics store front thumb

Sienna Modern Dentistry and Orthodontics not only serves the Missouri City area, but the neighboring communities of Sienna Plantation, Dewalt, Trammels, Teal Run, Riverstone, Lake Olympia, and Quail Valley. We know it's important to find a dentist you can trust nearby, so please check us out if you're looking for dentists in the 77459, 77489, 77545, and 77479 areas. We also provide many cosmetic dental options to help you find your perfect smile. We offer whitening and Invisalign clear aligners if you are looking to improve the look of your teeth. If your mouth needs some restorative work, we are happy to offer veneer or implant consults. We're on the southwest corner of Hwy 6 and Sienna Pkwy in the Sienna Plantation Shopping Center, near the H-E-B. We believe in supporting our community and proudly provide monthly promotions to our patients who help us give back to the community. Our team also serves the community by participating in Smile Generation Serve Days; community members who would not otherwise have access to dental care are provided with free dental treatment. Dr. Cao also donates a "Smile Makeover" each year.

Office Hours

Office Hours

Mon 8:00 AM - 6:00 PM

Tues 8:00 AM - 6:00 PM

Wed 9:00 AM - 6:00 PM

Thurs 8:00 AM - 6:00 PM

Fri 8:00 AM - 3:30 PM

Sat Closed

Sun Closed


Modern equipment helps make us one of the most technologically advanced offices in the area. It enables us to be faster, less invasive and more efficient while offering the highest level of dental care at an affordable cost to you.


*Regular value of at least $290. In absence of gum (periodontal) disease. New patients only. Cannot be combined with any other offers. Limit 1 per patient. Subject to insurance restrictions; cannot be applied to insurance co-payments or deductible. Not valid for Tricare or Medicare Advantage members. AZ, CO, ID, and NM Delta Dental members: valid toward cosmetic dentistry only. Not valid for appointments with pediatric dentist. Valid only when appointment is booked prior to 10/31/2022.


Cleaning, Exam & Digital X-Rays*


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