Refresh Your Look With a Cosmetic Dentist in Longmont, CO

When you feel good about your smile, it shows in every interaction. Keene Smiles offers advanced cosmetic dentistry designed to highlight your natural beauty and restore your confidence. Call 720-599-4479 today to schedule a consultation with a leading cosmetic dentist in Longmont, CO.

Call 720-599-4479 For An Appointment Schedule Online

Why Choose Us

At Keene Smiles, we don’t believe in one-size-fits-all solutions. Your smile is personal—and so is our approach. With a gentle touch, advanced technology, and a passion for esthetics, we deliver personalized results that reflect your goals and enhance your life. From your first visit, you’ll notice the difference in our care and commitment.

Our Services

We offer a wide range of cosmetic services to address concerns big and small. Whether you're looking to brighten your smile, fix minor flaws, or completely transform your appearance, we'll help you choose the right treatments to get you there.
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

Reveal the Smile You Were Meant to Have

Your smile is one of the first things people notice. If imperfections are holding you back, we’re here to help. Our cosmetic dentistry solutions are crafted to enhance not just how you look—but how you feel every day. Our most popular treatments include:
  • Teeth Whitening – Stains from coffee, wine, or aging don’t have to be permanent. Our professional whitening systems offer dramatic results in just one visit or with customized take-home kits. Enjoy a noticeably whiter, brighter smile that still looks natural.
  • Dental Veneers – Veneers are ultra-thin, custom-crafted shells made of porcelain that bond to the front of your teeth. They mask chips, discoloration, gaps, and misshapen teeth—giving you a symmetrical, radiant smile with long-lasting results.
  • Tooth Bonding – This conservative treatment uses a tooth-colored resin to repair small chips, close gaps, or reshape teeth in a single visit. It’s a fast and affordable way to refresh your appearance without committing to more complex procedures.
  • Smile Makeovers – A full smile makeover blends multiple cosmetic procedures to correct alignment, shape, and color for a completely renewed look. Every makeover is tailored to your individual goals, timeline, and comfort.
  • Gummy Smile Treatment – Excess gum tissue can make teeth appear short or uneven. We gently contour your gumline to create balance and symmetry, revealing more of your natural tooth structure for a brighter, healthier-looking smile.
  • Orthodontics – Clear aligners offer a discreet and convenient way to straighten teeth. These custom-made trays gradually shift your teeth into better alignment without brackets, wires, or lifestyle disruption.
We’ll help you choose the best approach for your goals, ensuring the final results feel authentic, attractive, and empowering. You deserve to love your reflection. Contact Keene Smiles at 720-599-4479 today to schedule your visit with a skilled cosmetic dentist in Longmont, CO. Together, we’ll create a smile that speaks volumes. 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