Transform Your Confidence With a Cosmetic Dentist in Niwot, CO

Nothing brightens your appearance or boosts your mood like a radiant smile. At Keene Smiles, we offer modern cosmetic dentistry that helps you look and feel your best every day. Call 720-599-4479 to book your visit with a cosmetic dentist in Niwot, CO who’s passionate about creating stunning results.

Call 720-599-4479 For An Appointment Schedule Online

Why Choose Us

At Keene Smiles, we understand that your smile is an essential part of your identity. Our approach combines cutting-edge techniques, customized treatment planning, and a welcoming environment to help you achieve the smile of your dreams—without stress or guesswork. You'll feel heard, understood, and empowered throughout every step of your cosmetic journey.

Our Services

Whether you want to address one minor flaw or completely enhance your smile, our range of cosmetic treatments allows us to design the perfect plan for your goals and lifestyle.

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

Cosmetic Dentistry That Works With Your Lifestyle

Cosmetic dentistry at Keene Smiles is more than surface-level. We focus on aesthetics, health, and harmony—because a great smile is also a healthy one. Our solutions are designed to be minimally invasive, highly effective, and uniquely tailored to you. Explore our most popular services:
  • Teeth Whitening – Professional whitening treatments go beyond over-the-counter solutions. We lift years of staining caused by food, drink, tobacco, and aging to deliver a dramatically brighter smile in less time—safely and effectively.
  • Dental Veneers – Crafted from porcelain, veneers are bonded to the front of your natural teeth to cover chips, discoloration, mild misalignment, or uneven shapes. They’re durable, stain-resistant, and ideal for patients seeking a complete cosmetic refresh.
  • Tooth Bonding – Using a tooth-colored resin, we reshape or repair teeth that are chipped, cracked, or irregular. Bonding is quick and conservative, providing impressive cosmetic improvement without extensive dental work.
  • Smile Makeovers – Smile makeovers combine multiple procedures—such as veneers, whitening, and bonding—into one customized treatment plan. Whether you’re preparing for a big life event or want a fresh start, we’ll help you achieve a confident new look.
  • Gummy Smile Treatment – If excess gum tissue is overpowering your teeth, our contouring treatments gently reshape the gumline to enhance symmetry and reveal more of your natural enamel. The result? A more balanced and attractive smile.
  • Orthodontics – Clear aligners offer a subtle way to straighten teeth without metal brackets. Ideal for adults and teens alike, this solution allows you to maintain your daily routines and appearance while improving your bite and alignment.
Each smile we enhance is as unique as the person behind it. You’ll receive personal guidance every step of the way to ensure the final results feel true to you. Fall in love with your smile again. Call Keene Smiles at 720-599-4479 today to schedule your visit with a top-rated cosmetic dentist in Niwot, CO. Let’s create something beautiful—together. 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