Get a Better Smile With Your Thornton Dentist

Make your smile healthier and feel more confident with expert care from your trusted dentist in Thornton, CO. Call Keene Smiles today at 720-599-4479 to schedule your appointment.

Call 720-599-4479 For An Appointment Schedule Online

Why Choose Us

We offer complete dental care with personal attention for each patient. Our team puts your comfort first with real care and understanding. You will like our modern technology and relaxing sedation that helps you relax.

Our Services

We provide everything your smile needs. Besides regular checkups and cleanings, we fix damaged teeth, replace missing teeth, make your smile look better, and offer emergency dental care when you need help fast.
Smiling male doctor in blue scrubs with Keene Dental embroidered, standing in a dental office.

Meet Dr. Gregory Keene

Your Dentist in Lafayette, CO

Dr. Gregory Keene combines a gentle approach with the latest technology to ensure that his patients receive outstanding care. He takes the time to get to know each patient and their needs, empowering them to make the right decisions about their smile care.

Read More About Dr. Keene

Make Your Life Better With a Healthy, Bright Smile

Your smile can change your life for the better. It helps create good first impressions and opens doors to new friendships and opportunities. Finding the right dental office that takes care of both the health and look of your smile is important for your long-term health. Visit your Thornton, CO dentist for:
  • General Dental Care – Regular checkups and cleanings help keep cavities away and your gums healthy. We treat gum disease early to stop tooth and bone loss that can happen if left untreated. We also offer treatments for bad breath and dry mouth.
  • Mouthguards – Our custom-fitted guards protect your teeth during sports and prevent damage from grinding your teeth at night.
  • Cosmetic Dentistry – Get a beautiful smile easily with treatments like porcelain veneers, professional teeth whitening, and dental bonding. We have options for every budget and beauty goal.
  • Orthodontics – Teens and adults both enjoy our discreet options for straightening crooked teeth, including nearly invisible clear aligners that fit easily into your daily life.
  • Restorative Treatments – From simple toothaches to badly damaged teeth, our skilled team can repair all types of dental problems with long-lasting, natural-looking results.
  • Teeth Replacements – Replace missing teeth with dental implants, bridges, or custom dentures. Our team helps you find the solution that works best for your needs, preferences, and oral health.
  • Emergency Dental Care – We provide quick care during dental emergencies. Our fast response ensures you get relief from pain and proper treatment without waiting too long.
Your comfort is always our top concern during every visit. Our friendly and welcoming team is great at creating a relaxing space for even the most nervous patients. For those who need extra help to feel at ease, our gentle oral sedation options effectively calm your nerves without making you feel tired afterward. We know that dental care is more than just technical skills. We take time to listen to what you want and worry about because we know each patient has different needs. Our approach focuses on building lasting relationships based on trust and respect. We believe in teaching our patients about their oral health so they can make smart choices about their treatment options. Call Keene Smiles at 720-599-4479 today to experience dental care from a Thornton, CO dentist who values your smile and treats you as an individual with unique needs and preferences. You can also request an appointment online.

Read Why Our Patients Love Us

For decades, I had a trusted dental office with the most amazing hygienist. Well, the dentist, I trusted and the hygienist, both retired and the rest of that clinic I used to go to doesn't cut the mustard for me. Quynh smiles feels like my new dental office. although I have only gotten a...

For decades, I had a trusted dental office with the most amazing hygienist. Well, the dentist, I trusted and the hygienist, both retired and the rest of that clinic I used to go to doesn't cut the mustard for me.

Quynh smiles feels like my new dental office. although I have only gotten a crown placed and one cleaning, I can say that the work is up to par with my current needs.

The office staff is professional, kind, courteous, knowledgeable, and responsive. Dr. Keene himself has great skill and for anyone needing a crown this is your guy. ONE STOP SHOP, he has the lab right there! For those of you who don't know what this means, it means that you leave with your permanent crown instead of the usual, 2 to 4 week wait with a temporary crown which often times falls out or has complication before the permanent crown gets sent back to your dentist.

Overall highly recommend this place.


Darcy P

Dr. Keene and his team are fantastic! I always feel like they are thorough, friendly, and cutting edge. Every cleaning and treatment I have received has left me feeling better and knowing that my teeth will stay healthy for a long, long time.

Katherine H

Absolutely amazing. Dr. Keene and his whole crew have literally saved my life. I had severe dental trauma growing up and highly neglected my teeth. Dr Keene laid out my options and helped me choose what was going to best for my health and my budget. His whole staff is truly so kind and caring. I...

Absolutely amazing. Dr. Keene and his whole crew have literally saved my life. I had severe dental trauma growing up and highly neglected my teeth. Dr Keene laid out my options and helped me choose what was going to best for my health and my budget. His whole staff is truly so kind and caring. I already have and will continue to refer anyone I know to him.


Amanda N

Keene Smiles is the Best! The staff is absolutely wonderful.
Dr. Keene and his staff are so kind. Shout out to my favorite hygienist ever,Rhonda.

Denise L

My visit was scheduled to replace a crown. Although I was very nervous about the work that would be performed, the staff made me comfortable and the procedure was as pain-free as can be under the circumstances. Dr. Keene explained every step of the process. The technology he uses to make the...

My visit was scheduled to replace a crown. Although I was very nervous about the work that would be performed, the staff made me comfortable and the procedure was as pain-free as can be under the circumstances. Dr. Keene explained every step of the process. The technology he uses to make the same day crown is simply amazing. So happy I found his practice!


Sara R

My visit was a quick and thorough tooth cleaning. I hadn't been Keene Smiles for some time because of the pandemic. I'm glad I went.
p.s—Kristin, the hygienist, was great!

Richard P

My first visit was very efficient from check-in to check-out. Every step was fully explained and I was given choices on optional treatments. Dr, Keene is very friendly and the staff was kind. I recommend him highly.

Carle C

The folks at Keene Smiles are efficient and proficient. My appointment was on time and the technician made me comfortable while she took the x-rays and did the cleaning. Dr. Keene explained the condition of my teeth in a very understandable manner.

Bob B

From the time you enter the door and Emily greets you with her great smile, you'll feel at ease and welcome. The entire staff will work to make you comfortable while they beautify your smile. The level of personal care and attention to detail are unmatched. Dr Keene is a true genius in the art...

From the time you enter the door and Emily greets you with her great smile, you'll feel at ease and welcome. The entire staff will work to make you comfortable while they beautify your smile. The level of personal care and attention to detail are unmatched. Dr Keene is a true genius in the art of cosmetic dentistry!

Thank you all for your dedication!


Amy H

This office is modern, well laid out, and clean. The employees are all very friendly and helpful. Dr. Keene is friendly, knowledgeable, and great to work with. I received same day service on a crown preparation and installation with fantastic results. I've been to many different dentists over...

This office is modern, well laid out, and clean. The employees are all very friendly and helpful. Dr. Keene is friendly, knowledgeable, and great to work with. I received same day service on a crown preparation and installation with fantastic results. I've been to many different dentists over the years from around the world. This office and their Doctor and services are the best I've experienced. Highly recommended even with an hour drive one way!


Shawn E