Keen Family Dentistry, PC
C. Mark Keen, Bryce M. Keen, Blake C. Keen, D.D.S
General and Cosmetic Dentistry
Call: (909) 989-6661

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Read what other patients have said about us:

Paul V, Alta Loma

Doctor Keen has been our dentist for over twenty years he’s a dedicated doctor and very knowledgeable to his profession. His staff are very caring with excellent customer skills.

Ross Knapp, Rancho cucamonga

Wow Stephanie the new hygienist is tremendous. Never had my teeth look so good.

Diana M., Rancho Cucamonga

This was my first appointment at Keen Family Dentistry. I was very pleased with my experience. From the front office, the hygienist, to Dr. C. Mark Keen, they were all wonderful, friendly and very professional. I am so glad I chose this new dental office. I have definitely found my new dentist.

Bob H., Alta Loma


Dan P., Alta Loma

I have been going to this office for many years. All of the staff are very professional and knowledgeable. If you have any issues with your teeth, they can fix it right away. I would not trust my teeth and my family's teeth with any other dentist office.

Michael F, Ontario

Steph is great. Always request her for my regular cleanings. Office staff is very friendly and helpful. Very attentive and answer any questions I have in a calm informative matter. I have been coming here for years and have no plans to change that. Thank you Dr. Keen and Dr. B for having such a great office and team.

SA, Rancho Cucamonga

Simply the best! Everyone is always so welcoming and I always have such a pleasant experience (prior to Keen Dentistry this is not something I thought I would ever say about my dental appointments!). Would recommend to anyone!

Larry A, Pomona

It's always a pleasure service all around is perfect

Patricia , Rancho Cucamonga

Best experience I ever had at the dentist office.

Bill O, Rancho Cucamonga

Everyone is so friendly and welcoming at this dental office. Stephanie the Hygienist so so patient and kind. Dr Keen was not in the office due to a baby birth he was at. I am looking forward to meeting him at the next appointment.

Lynn W, Rancho Cucamonga

Always a 5 star at Dr Keenfamilydentistry, Dr Keen is amazing and so is his son , The staff is so welcoming and professional been going there for at least 20 years , I’ve recommended many people to Dr Keen because he is so great and honest

Rosa A, Victorville

Dr Bryce is always so polite and I always look forward to my dentist appointment. Had x-rays taken and teeth cleaned. Everyone there are always a pleasure to see.

Keith M. , Rancho Cucamonga

Highly recommend Keen Family Dentistry to anyone, but especially for parents looking for a dentist for their kids. Friendly, compassionate and always aware if a child is nervous or scared, and they make sure to make them feel comfortable. After my sons cleaning, the dentist stopped in and immediately remembered he played soccer, and asked how it was going. Made my son feel like he was a friend. Excellent dentist, excellent staff, highly recommend!

Stanley B, Rancho Cucamonga

It was great. On time and no stress!

Joe l, Rancho Cucamonga

Kind courtious professional.

Charlie G, Fontana

Dr Keen and Luis were amazing! Dr Keen was able to do my filling without any anesthetic and it was painless! He was so gentle and I felt comfortable in the chair. Great experience!

Lesley C, Alta Loma

I’ve been a patient for many years and I can’t recommend Keen Family Dentistry enough! Kind, thorough, gentle and they really care about their patients. The staff is superb and efficient as well.

Kim H, Upland

Dr Keen is absolutely amazing!! I had a tooth pulled and didn't feel a thing! Not even the shot!! He is a magician when it comes to NO pain! I'm so thankful for him as I have a phobia of the dentist! The office staff is like family!! I love everyone ?? super thankful to be able to come here!!!

Philip L., Alta, Loma

He gives a great shot!! Hahaha. Have no fears when you need Novacaine. Dr Keen will take care of you.

Nita, San dimas

Very patient, kind and understanding ……thank you

Jami C, Alta Loma

Great staff and efficient, professional hygienist and dentist. I’ll be switching my whole family to Dr. Keen!

Shelby T, Rancho Cucamonga

I had a crown fall off late on a Friday evening. The next week Dr. Keen’s office was closed for spring break. The first Monday they opened back up I called to get in. They squeezed me in on Thursday. I have had nothing but problems with the crown(the work was done at another dentist office). It is not the first time it’s fallen off. Dr. Keen took the time to correct the problem to avoid this happening again. Dr. Keen is amazing! I never have pain when he gives me injections for numbing. The office staff is so welcoming. Dulce always helps with our billing and claims and Luis is very good at his job too! We love this family owed business where they treat you like family!

Thomas P, Rancho Cucamonga

Everything went very well.. I have never had any complaints with your office or staff...

Don McDermott , Rancho Cucamonga

Hands down best Dentist and staff. Customer service at the highest level.

Bria H, Rancho Cucamonga

Dr. Bryce explained my procedure very well and made sure I wasn’t in any pain. Thank you, doctor!

Shannon C, Rancho Cucamonga

Dr. Keen has been my dentist for 20 years. The staff is so amazing. Best team I’ve ever seen. Dr Keen is very gentle and his skills in dentistry are unsurpassed. Hygienist Stephanie is very thorough and personable. Dr. Bryce is very good at explaining what his process will be for your dental procedure. Monique in the front keeps this team all together and happy. So thankful for this family dentistry office!

Steve G, Brea

Much thanks to the staff and Dr. Keen, fit me in on an immediate basis last minute and got my problem diagnosed and taken care of very quickly. Always worth making the trip from Orange County.

Merri w, Lytle creek

Greatest Dr and staff ever. Great work

Billy c, San Antonio heights

The Keen family Dentistry is amazing! I received two new crown that look and feel great. The staff are warm and friendly. My teeth have never looked better. This dental office is a hidden gem!

Gus Alonzo, Ranccho Cucamonga

Best Dentist , Great attention to all aspect of my teeth.


Staff is awsome, ABSOLUTELY the Best DENTIST AND STAFF !!

jesus, upland

My son and I love coming to Keen family dentistry .. from the front staff Monique to everyone in the back Luis,Diana and of course Dr.Keen and Dr.Bryce ..our experience has just been amazing i always refer friends family and anyone who asks to this practice

George O, Rancho Cucamonga

Long time client Excellent service staff is super friendly I was very pleased with the hygienist she was thorough and did a great job polishing my teeth I have always left smiling

Janice, Victorville

Best dental office/staff. I wouldn’t trust anyone else

Suzanne Molina, Alta Loma

My entire family have been going to Keen Dentistry for many years & have so much confidence In everyone working there. I have referred friends & they have all been extremely pleased.

Tom S, Orange

Everything went very well. It wasn’t long to have my teeth cleaned and x-ray. Everybody is great there.

Katherine G, Montclair

I had a root canal done today, I was not expecting to have one, but the Dr was so awesome and gentle and explained everything that was going to take place before, during and afterwards. It was my first time having this type of procedure and I did not have any pain after the numbing meds took effect and afterwards I went to work without any pain or issues. Thank you keen family dentistry for the great experience!

Carissa, Redondo Beach

Always a great experience! I’ve been seeing Dr. Keen since I was in high school and I’ve never had a bad experience. The dental hygienist are always kind as well. No matter who I get paired with I know I will be taken care of.

Debi T, Rancho Cucamonga

I am a long time patient and quite simply they are the BEST!! I am a nervous dental patient and the minute I walk through the door I feel at ease. From Monique at the front, Stephanie my hygienist to Dr Keen and his right hand man Luis , I never doubt that I am receiving the best care.

Gina M, Alta Loma

Keen's Family Dentistry is always clean. The whole staff is friendly and kind. They have always been accommodating to my dental needs, with attention to detail and excellent follow up. My family and I have been going there for over 20 years, and i have only good things to say!

Crystal Shearer, Ontario

Like a lot of people, I fear the dentist and struggle to make it a priority because of that. My Mom referred this dentist office because of the same reason and we have both been looking for a new dentist; one who is gentle, doesn't judge and makes you feel comfortable. This office checked all those boxes, and then some! Right from the moment I stepped in the door, I was greeted with a warm welcome from Monique. Three people walked in the door and she knew their name, how great is that! I didn't have to wait long before Stephanie took me to the back for x-rays and a cleaning and she was gentle and so nice and friendly. Dr. Keen Sr. came by to review my x-rays and to introduce himself and go over my plan. He was so nice and gentle as well. I love that they don't try to tell you that you need this or that just to make money off of you, they're honest and helpful. After years of fearing the dentist, I now feel comfortable with everyone in this office and will continue to go there :)

Paula J., Claremont

Dr Keen has been our family's dentist for 30yrs. He is the BEST dentist and we would recommend him to everyone, which we have done for many years. We are now very happy to have Dr Keens son, Dr Bryce, as our dentist too. The entire team at Keen Family Dentistry treat us like family, they have taken excellent care of all our dental needs for years.

Sheena S., Fontana

Great experience! The staff was super accommodating! Highly recommend! Definitely looking forward to many future visits with Keen family dentistry! Thank you for a great experience :)

Steve L, Rancho

Jasmin did a great cleaning every one else was squally expert appreciate the caring and concern about the health of my teeth

Charles Campbell, Rancho Cucamonga, CA 91701

The staff is fantastic. They are very friendly and make you feel right at home. Their dental skills and professionalism are the best I’ve had from all the other dental services that I have used over the last 40 years.

Mary B, Alta Loma

Always helpful and supportive. My teeth look and feel great!


Great dentist. He has been my dentist for over 25 years.


Great dentist. He has been my dentist for over 25 years.

wendie jo camacho, Alta Loma

I truly love and appreciate the Keen Family dentistry, all of them from front office staff, assistants and Dr’s! I personally think all of the patients are incredibly fortunate to have Dr Keen, all 3 of them, in our city??

Danielle E., Rancho Cucamonga

Dr. Keen is the best Dentist I have ever had! He is very gentle and very thorough! His office staff is amazing and they always go above and beyond! Once you start getting seen by Dr. Keen you’ll have a Dentist for life! Thank you guys for all that you do for your patients!??????

Polly L, Fontana

Thank you for being so kind & gentle

Sable V, Rancho Cucamonga

Always have a pleasant experience, they make you feel like they truly care about you as a patient

Jerry Leyba, Upland

My appointment was on time and not delayed. Friendly customer service.

Diane & David G, Ontario

Great Family Owned Dentistry. Run with love & & great care. We’ve been coming here for many years.

Larry , Rancho Cucamonga

very nice visit

Greg O., Ontario

No body likes a dentist. But if you go to Dr.keen you'll find a dentist and a friend you'll like .I've been seeing Dr.Keen and his staff for over 25 years. Honestly I would recommend him to anyone.

Doug, Huntington Beach

Best Dentist's and staff on the planet! Family owned and run. I have been a very happy patient for 20 years and I drive 100 miles round trip ,because its worth it! ! They have soft hands and akways explain in plain english my options and game plan with in my insurance budget. 5 Stars +

Katie P. , Rancho Cucamonga

Outstanding service! Professional staff, great service. Thank you ??

Pauline S., Rancho Cucamonga

The service received at Keen Family Dentistry is always excellent. From the moment I walk in the door I am greeted by name and treated in a friendly and professional manner by all of the staff. From front office to hygienist to dentist a patient couldn't ask for better care.

Marlo S, Rancho cucamonga

I was immediately met with a smile and Salutations from the front desk. My hygienist was gentle, kind and very professional. Dr. Keen made sure i didn’t have any questions or concerns regarding my teeth and gums during his check up.

Kelly F , Fontana

Keen Family Dental has been absolutely amazing. They have taken absolute amazing care of myself, who has major dental anxiety from bad experiences in the past and amazing care of our kiddos. They’ve always been very accommodating and understanding of our family and our families needs. Both Doctor Keens are amazing, comforting and gentle and the entire office staff is top notch! Keen Family Dentistry will be our forever dental office!!!

Juan Vasquez, Rancho cucamonga

My broken bridge was treated as an emergency and was quickly and professionally repaired and replaced with no pain . XLNT experience

Kristian Rojas, Fontana

I love Keen Family Dentistry, the staff is so friendly and welcoming!

Beth D, Etiwanda

Front office and back office staff are always kind and professional. Dr. Mark Keen is the best. He always explains what treatment is necessary and how he is going to proceed with the treatment . He is always professional, kind and makes sure you are comfortable and all procedures are as painless as possible. Great office environment.

Edward B, Upland

Everyone involved did an outstanding job, as usual!

Rachel Ross, Fontana

I had a little bit of a dental emergency, and Dr. Keen and his team were able to get me in quickly! His staff was so friendly and made me feel comfortable. He was thorough in resolving my issue and I’m very happy with the result! Keen Family Dentistry is the way to go for your dental needs!! Thank you.

Angel C, Alta loma

Love Dr Keen and his staff. Been going to him for over 20 years. Highly recommend them.

Lauren, Rialto

Great experience always

Don Kavalle , Upland

Very friendly and professional staff . Would recommend to friends and family .

Karry Denton, Alta Loma

I have been going to Keen Family Dentistry for many years now and love the care that I receive. I have recommended them to my family and friends. Also really like the electronic appointment reminder system.

V, Rancho Cucamonga

My female hygienist did a great job with my cleaning. Dr. Keen was very attentive to my care.

Hannah R, Alta Loma

Keen Family Dentistry is truly the best!

Lynda Sims, Upland

I have been going to Keen family dentistry for about a year. They are always friendly and professional. I highly recommend them to anyone looking for a new dental office.

Masuda h, Rancho Cucamonga

An excellent service!!! Great experience over the years. , Bryce keen , Is an amazing doc , he does a great job . And he is very friendly , lots of smile !!!

Elena B., Upland

As usual our experience and expectations are always above and beyond. I have an adult special needs son. He is always treated with the utmost care and respect. He actually enjoys going to the dentist. Our whole family goes to Keen Family Dentistry and again are always left with a good experience.

Katherine S, Montclair

Dr Bryce was knowledgeable and patient. He listened to me and gave me great advice concerning my treatment.

Richard , Upland 9 st

I don’t like water cleaning. I hate my teeth ! I want platinum implants like Master P

Joe M. , Alta Loma

I have always loved how fast they get me in for my appt. time . No waiting ! ??

Dylan G, Fontana

I had a great experience! Everyone in the office is so friendly and welcoming. My hygienist was Stephanie and she was gentle and thorough. Great to talk to! Dr Bryce is very thorough and explains things to you so you understand. He’s also very gentle and makes you feel comfortable in the chair. So glad I found this office. I will be a patient for life!

Sandra G, Rancho Cucamonga

Friendly, courteous, professional, and efficient.

Jake Puckett, Alta Loma

As always, excellent service along with personable staff who keeps the patient well informed and taken care of. Highly recommended!

Blythe Millar, Glendora

I was very pleased with the service I was given. Everybody was very professional.

Joshua, Chino

Dr Bryce is honest and thorough!

Alice Toombs , Fontana

Always a pleasure from front office to hygienist to dentist - Love Keen Family Dentistry!!

LJ, Upland

Everyone in the office was very friendly and helpful. Lots of smiles.

Jose Martinez , Fontana

Great customer service..dedícated staff...excellent work

Larry A, Ontario

Jazzmin is the best friendly and accommodating

Bob M, Alta Loma

Great experience over the past 15 years.

James , Rancho Cucamonga

First time here.Awesome experience. Light at he touch and very friendly. Didn’t feel like I’m getting my teeth drilled out just for a simple cleaning. I definitely won’t wait 4 years to be seen again.

Michael, S.

I missed my original appointment even after all the notices. Im giving Keen Dentistry a 5 star because they worked with me to give me an open slot in the afternoon. My Keen Dentists are always willing to work with the client for the best outcome. Also I had a new hygienist and she is just as terrific as the previous. I think my dentist is very “Keen”. “Love Em”!

Joe G, Fontana

I had a great experience with this office on my first visit!

Norma, Glendora

Dr. Bryce Keen has a natural gift with dentistry. Always very gentle and puts one at ease right away. I appreciate his thoroughness and the fact that my visits have always been pain free!

Luis Jr. Medina, Rancho Cucamonga

The fact that it’s a small private family owned dentistry is what I love about it. They truly care for your teeth and do a great job of filling you in before your appointment if something opens up. I actually enjoy going to the dentist

Elena B. , Upland

As usual my experience was great. I was only there for a cleaning (this time) but my hygienist was friendly, professional and made me feel completely at ease. The front staff is great and attentive and course Dr. Keen is the best. I didn’t get to see Luis on this visit but he’s super too. Thanks to all !!!

Michael F, Beaumont

Stephanie did a great job…… very comfortable & pleasant

Aurora S., Rancho Cucamonga

Keen Family Dentistry has always been professional and explain things in a way that the kids understand so they can take ownership for their health! Staff is friendly and helpful!

Daryl M., Rancho Cucamonga

Been going to Keen for 20 plus years. Great place full of caring people.

Judy C., Claremont

Thank you for you professional and caring service!

Paul & Lucy V, Alta Loma

We have been going to Dr. Keen’s for dental exams and dental work since the 90’s, Dr. Keen and his staff have always been very patient friendly and thoughtful. Prior to dental treatments Dr. Keen is thoughtful and provides a clear understanding of any dental work that is needed. Keen family dentistry is the best

Vinny M, Upland

Dr. Keen and his staff are great! I always feel welcomed and taken great care of.

Terry T, Upland

Provides excellent care and thank you for being patience and taking good care of all the patient.All the staff here are friendly and helpful.Both Dr. Keen and Dr. Bryce prefer to save teeth and they have the best interest of the patient. I am lucky to find this office and happy with their care.

Sheri Dill, Alta Loma

Love the entire office!

Susan G., Upland

As a customer first, treated very well with kindness, respect and incredibly helpful navigating through dental plans. As a patient, the highest regard in care for dental health. A very thorough, educated, friendly and kind staff. For over 20 years, I have received same great customer care and service. All my customers, family and friends I recommend, have said the same and love this family practice.

Candie M, Upland

The dental hygienic is great! She does a very thorough job. My gums are never left sore or bleeding yet, my teeth are sparkling clean.

Rebekah Leon, Upland

Very nice low stress office! The best case senario for me.

Tyler P., Alta Loma

I have been to many different dental offices and I have to say this is by far my favorite. Both Dr. Mark Keen and Dr. Bryce Keen have a level of professionalism that is second to none. You can tell they truly care about their patients and that is hard to find these days. When I’m there I feel like family. If you are searching for a new dentist I guarantee your search will stop here! 10 out of 10 service!

Liz D , Glendora

Love this office. The best staff! Both Dr Keen’s are awesome. Once you go you’ll never change dentists again.

Lisa M. , Rancho Cucamonga

Great dentists and office staff!

Pat M., Upland

I always have a positive experience at Keen Family Dentistry! I appreciate the detailed explanations and the professionalism. There are no surprises as far as the plan for services or fees. I highly recommend if you are looking for experienced and honest dental services in a very relaxed environment. All of the staff is always very helpful too!

Bob H, Alta Loma

Loved the chair side manor of Dr Keen. Everything was explained well and they were fast.

Mike, Wilson

Always a quick and easy visit.

Richard L., R.C.

Wow,Bryce and the dental assistant rocked.! Very professional and personal.

Julie, Fontana

I loved this dentist.. Family oriented making their customers comfortable and accommodating!

Jon H, Rancho Cucamonga

Had great experience, no wait time. Staff was fun and engaging. Dr Keen(son) was caring/gentle .

Kim Holman, Rancho Cucamonga

I love your office. It is so friendly and patients are treated like family. Dr. Keen makes you feel at ease with his calm and friendly demeanor. Luis is amazing too. Everything is explained and questions are answered. I was not looking forward to my crown replacement but it was a relatively quick procedure and I was pain free. Thank you for taking such great care of your patients!

Shelby, Rancho Cucamonga

Always a pleasure to visit Dr. Keen’s office. They are all so nice and professional.

Tracey B, Highland

I love the staff at Keen Family Dentistry! Always pleasant and guaranteed smiles. The Hygienist was amazing and has a wonderful personality. I have recommended family and friends and they love it as well. Cheers to you all!

Kristina , Rancho Cucamonga

Most pleasant dental experience I have had! Jazzmin was so great with my cleaning and was so friendly, so was the rest of the staff. They got me in right away and were more than accommodating. After too long of a hiatus from the dentist, I am so glad I found them and won't hesitate to go back!

Kathy Nichols, Covina

Timely, polite courteous staff

Philip L, Alta Loma

Dr keen did a great job of examining my tooth. So glad didn’t need any work.

Stacy M., Upland

Super friendly and accommodating.

Luis Outumuro, Rancho Cucamonga

The best! Great service, explains things in detail and friendly staff!

Crystal , Winchester

Great practice

Stephanie HOff, upland

Thank you to Dr. Keen and Luis and all staff members. I had a very difficult case with my lovely mouth and Dr. Keen, Luis and the staff as usual , made this entire experience very pleasant. He is so very gentle and thorough and a perfectionist. He made my teeth and crowns look absolutely beautiful. I am so blessed to have found this wonderful family dental practice. Just wanted to say I am greatful and thank you all for making my life easier with my dental problems. I love you guys!!!!! Thank you with all of my heart!!!! Our whole family are patients of this dental practice and we are all pleased as punch and greatful for your services. SH

JudyB, Alta Loma

The Doctors Keen (great education/training at USC) and staff are very caring. They put their patients first in the order of their daily priority. Last Thursday, I called the office about 1 pm because I had broken a good-sized chip off my molar. The response was almost immediate, "Could I come in that afternoon at 4 pm and Dr. Mark Keen would look at it." Wow. Okay, yes. Not only did he look at it, he proceeded to prep the molar for a temporary crown. He spent considerable time dealing with my problem. His staff had to stay and work for more than an hour after normal closing time to finish the work. They were very cheerful and no one ever gave me a sense that I was trouble or imposing on their schedule. It was deeply appreciated by me, and I was so impressed. Patient Care is not just lip-service at Keen Family Dentistry. They really mean it.

Denise J, Alta Loma

Dr. Keen, as well as his entire staff have been quite amazing. Going to the dentist may give some uneasiness for sure, however, going here will eliminate any fear you may have. Dr. Keen is extremely kind, gentle, knowledgeable, and he always helps you to understand any procedure. I've been going to Dr. Keen for too many years to count, so I can tell you, I won't go anywhere else as long as Dr. Keen is in practice. Also a huge thank you to Yolanda, the hygienist who cleans your teeth like no other. She is gentle, kind, and thorough.

Kassandra A., Rancho Cucamonga

Love this office! Dr. Keen is great and careful. His team are all wonderful. Love them all!