Keen Family Dentistry
Dental of C. Mark Keen, DDS
General and Cosmetic Dentistry
Call: (909) 989-6661

Patient Reviews

I am very surprised that I'm the first person to write a review for Dr. Keen.

For some people it is very difficult to see the dentist. The fears of root canals, more appointments, extractions, and pain are the worst. Dr. Keen, removes ALL those fears. I've moved around quite a bit in the last 12 years, and whenever I get a new dentist I use Dr. Keen as a reference to what a great dentist is. After 3 dentists, I find myself commuting to Rancho Cucamonga, as he is the only dentist that makes me feel at ease.

He is very professional and does great work as well.

Yelp- Chris V.

What can I say about Dr Keen?! UMMM HE'S A USC ALUMNI NEED I SAY MORE?! He is an amazing dentist! This is coming from a girl who much rather go through labor than see a dentist! He is so patient, so calm and so NICE like I can honestly see why people love him so much. My husband has been coming to him for years and while he's a bit of a drive for us, he's definitely worth it. The only downer at least for me is he doesn't work Fridays and weekends but it's ok I'm learning to work around it. Dr. Keen, thank you so much for taking care of me and my teeth, your patience really makes me feel more at ease coming to get dental work done

Yelp- Janice M.

The staff was very friendly and helpful and I was so happy with the services that they offered. I have recommended Dr. Keen and his staff to all my friends and family and will continue to do so.

Yelp- Jaylene M.

I was so nervous to go to the dentist but Dr Keen explained everything and I felt so much more relaxed. He was awesome and I was very comfortable getting my procedure completed. I highly recommend his calming nature and detailed explanation.

Yelp- Bonnie K.

Fabulous dentist!
I moved into the area from out of state and was concerned about finding a good dentist. A co-worker recommended Dr. Keen and he is great!
The office staff is very kind and take care of all of my insurance claims very efficiently.
He recently replaced some 40 year old fillings for me and was so careful, gentle and concerned about me well-being during the two sessions needed to replace 7 fillings.
My wife and I both go to Dr. Keen and recommend him to everyone.

Yelp- Scott K.

Dr. Keen and his staff are always a pleasure to visit! My family has been receiving dental care here for years and we couldn't imagine going anywhere else! I am a stay at home mother so my 18 mo daughter has to go with me to my appts but I never have to worry because I know that Dr. Keen will be patient and understanding with me as I deal with her when needed. I am thankful to have found a Dentist who is careful and gentle when taking care of my teeth and takes any necessary extra steps to ensure that I am comfortable and calm.

Yelp- Samantha A.

Dr. Keen deserves a great review. I quit going to my last dentist when I just could not take the pain and long, long appointments. Dr. Keen is not like that! I have been going to him for about five years. During that time, he has had to fix some work that was done by my last dentist, and his work is far superior. There is no comparison. He works in a calm and careful manner, and lets me know exactly what he is doing. I always feel comfortable.

Yelp- Sharon M.

Great dentist and wonderful, warm, competent staff. My only wish would be that they were located a bit more off the beaten path: it's not in the most modern of buildings and the parking lot is a bit of mess. But I'd go to MUCH worse places to get this fantastic service.

Pamela B.

Dr Keen is an awesome dentist! I have been going to him for many many years. He really takes the time to make sure you are comfortable through out all procedures. He also put veneers on my front teeth a few years ago and I constantly get compliments from strangers about how perfect my teeth are. He really is the best!

Yelp- T M.

Great dentist and staff. Very caring and thorough! His office is busy because he is good! Office does a great job of running on time!

Yelp- PC H.

I stopped by to see Dr. Keen for the first time for a routine checkup and cleaning and left with a (CLEAN) smile on my face! I was promptly greeted by Monique, who helped me fill out my initial paperwork and within minutes, I was called in.
As soon as I was seated, X-rays were taken and my teeth were cleaned by Yolanda who was very friendly and answered all of my questions. She is definitely very experienced. Dr. Keen then stepped in to go over my X-rays with me and was very detailed in describing any issues.
Overall, my experience was great and I can see why this office has a perfect 5 star rating. This is now my go-to dental office!

Yelp- James L.

This entire office makes going to the dentist comfortable. The office staff and hygienists are friendly and efficient. I've never had to wait more than 5 minutes to be seen. Dr Keen is friendly, warm, calm and will take time to explain things and answer your questions. His standards are high. I had an implant incorrectly made by another lab. Dr Keen worked with the endodontist to see that it was remade correctly. I highly recommend DR Keen and staff.

Dr Keen worked on two new crowns today in one visit. I've never had Novocain injections that didn't hurt, but today I did! Dr Keen is patient, understanding, and professional.

Yelp- Karen W.

I just have to say I've been to a lot of dentists and Dr. Keen is the best by far! He is so gentle with a needle and he walks you through everything he is doing with the procedure. He is also super sweet and very funny!! I would recommend my family and friends to go to him!! If you ever need the most amazing dentist around then Dr. Keen is your dental angel!!!

Yelp- Danielle H.

Mark and all of his staff are amazing. My wife and I have been going to Mark for all of our dentistry work for years and have recommended the office to several friends and family members over the years. He is very gentle and attentive with all his patients, as well as the hygienists and support staff. We highly recommended them for all your future dentistry.

Yelp- Mike T.

I couldn't be happier with Dr. Keen and his great team at Keen Family Dentistry. I've have nothing but great service since first switching dentists 7 years ago. I've had a positive experience with everyone at the office---Dr. Keen, Yolanda, Luis, Monique, and Dulce.

Going to my old dentist's office was like going to buy a new car. After finding what you wanted to buy you would have to see the finance manager to discuss how to finance the car for the next 5 years...Not at Dr. Keen's office; his office is more concerned about your teeth and overall health and your positive family experience.

Yelp- Frank C.

I have been a patient of Dr. keen for a long time. I have always received excellent care. His attention to detail, whether repairing a broken tooth or fitting you for a night guard, is unsurpassed. He will inform you of the latest technology available regarding your procedure so that you can make an informed decision. If a filling is necessary I know he will make it as painless and quick as possible. I always feel as though I have chosen the best. My children who started with Dr. Keen when they were young are still seeing him for their cleanings and they are 29 and 30.

Yelp- Cate W.

Top notch, so good I almost want to keep them a secret.

Yelp- Brian B.

Dr. Keen is truly the best! I was referred to him by my orthodontist and could not be happier. I recently had some fillings redone and the entire procedure was painless. Dr. Keen and his staff ensured I was comfortable the entire time. I honestly did not feel a thing! Everyone at this dentistry is caring, professional, and welcoming. Dr. Keen and his staff always exceed my expectations. If you are looking for a great dentist who truly cares about his patients, look no further. I always have a positive experience here and I highly recommend Dr. Keen!

Yelp- Kerri K.

I have been going to Dr. Keen for over 15 years and he and his office staff are so welcoming and professional. My kids have grown up with Dr. Keen and he does an amazing job for our entire family.

Yelp- Christine K.

want to thank everyone at Dr Keens office, they all make you feel so comfortable, and relaxed. Had my 2nd appointment yesterday, went in very nervous and with anxiety about having my tooth drilled on. Everyone from Monique at the front desk to Luis that assisted Dr Keen to Dr Keen himself put me at ease. I had an awesome appointment, I wasn't in pain during the procedure or after. They're amazing, no pain today either. Never thought I would say I'm not afraid of going back. Would recommend Dr Keen and his staff to anyone that needs dental work done.

Rosie A.

Yelp- Rosa A.

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