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Years of Experience
Repeat Patients


Dr. Keen has practiced in the El Cajon area for over 22 years. He attended Patrick Henry High School, and UCSD for his undergraduate studies. He is a member of the American Dental Association, California Dental Association, Academy of General Dentistry and the El Cajon Valley Lion's Club. He resides in El Cajon with his wife, Tracy and 2 children.

We are an El Cajon, CA dental practice devoted to restoring and enhancing the natural beauty of your smile using conservative, state-of-the-art procedures that will result in beautiful, long lasting smiles!

High Standards

A standard of excellence in personalized dental care enables us to provide the quality dental services our patients deserve. We provide comprehensive treatment planning and use restorative and cosmetic dentistry to achieve your optimal dental health. Should a dental emergency occur, we make every effort to see and care for you as soon as possible.

Education & Prevention

As a practice, we are true believers that preventative care and education are the keys to optimal dental health. We strive to provide “dental health care” vs. “disease care”. That’s why we focus on thorough exams – checking the overall health of your teeth and gums, performing oral cancer exams, and taking x-rays when necessary. We also know that routine cleanings, flossing, sealants, and fluoride are all helpful in preventing dental disease. Not only are we focused on the beauty of your smile, we’re also concerned about your health. A review of your medical history can help us stay informed of your overall health, any new medications, and any illnesses that may impact your dental health.

Uncompromising Safety

Infection control in our office is also very important to us. To protect our patients and ourselves, we strictly maintain sterilization and cross contamination processes using standards recommended by the American Dental Association (ADA), the Occupational Safety and Health Administration (OSHA), and the Center for Disease Control (CDC).

Training & Expertise

As your dental health professionals, we want you to be confident knowing that we are a team of highly trained and skilled clinicians. We pride ourselves in providing the care you need to keep your smile healthy. To give you the best possible service and results, we are committed to continual education and learning. We attend dental lectures, meetings, and dental conventions to stay informed of new techniques, the latest products, and the newest equipment that a modern dental office can utilize to provide state-of-the-art dental care. Also, being members of various professional dental associations helps us to stay abreast of the changes and recommendations for our profession.


  • Bachelor's Degree, University of California, San Diego
  • Doctor of Dental Surgery, University of California, San Francisco

Professional Memberships

  • American Dental Association
  • California Dental Association
  • Academy of General Dentistry
  • El Cajon Valley Lion's Club
  • Fellow, Academy of Dentistry International


  • Dental Board of California

Awards & Publications

  • San Diego Magazine's Top Dentists for 2010, 2011

Insurances Accepted


Delta Dental

United Concordia

All PPOs (Out-of-Network) accepted

Office Hours

Mon3:30am - 12:30pm
Tue1:00am - 10:00am
Wed1:00am - 10:00am
Thu1:00am - 10:00am


Teeth Cleaning (New Patients)$97.00
Teeth Cleaning (Kids)$80.00
Fluoride (for kids)$36.00
Teeth Whitening$325.00
Dental Consultation (New Patients)Details upon visit
Root CanalDetails upon visit
Crowns$1089 ~ $1122

Patient Reviews

Overall Rating

What a pleasant experience! Beginning with the front desk and all through the office, Dr Keen and his staff made me feel so comfortable on my first visit. Kelly, my hygienist was so sweet and personable and Dr Keen spent quality time with me and explained everything in detail. While going to the dentist is sometimes a frightening experience, this group was so sincere and made me feel totally at ease. I have found my new dental home! I would totally recommend this group 100%!

Overall Rating

I have been getting my teeth clean and taken care of for over 4 years with this Dr and Staff... great people... couldn't ask for a better place

Overall Rating

Dr. Keen and staff truly aim to please and provide 24/7 service. Over Labor Day weekend I had unbearable throbbing pain in my tooth. I called the emergency number at 6:30am on Sunday morning and within an hour Dr. Keen met me at his office, diagnosed the problem, and completed a root canal. I could not have been more appreciative of his hard work.

Overall Rating

Dr. Keen is excellent dentist and very kind man. My family and I have been his been a patient since 20 plus years. His team are very professional and personable, and overall the best dentist.

Overall Rating

Doctor Keen is the best dentist I have ever had in the 50 plus years I've been going to the dentist in the SanDiego area.

Overall Rating

My experience at this office was awesome! I had a crown done and never felt the injection!! He has a wonderful caring staff and the office looks great after his recent remodel too! He does need to update the pictures here...speaking of pictures...he is also a fantastic photographer and has his photos on a video screen in his waiting room! Very relaxing but next visit I will have to arrive earlier so I can watch longer- they try very hard not to let you wait!

Overall Rating

If there's 10 stars, that's what I will give to this review. I have been a patient of Dr. Keen since 1990 long before my daughter was born, and she is now 22 years old. My fiancé' and his son now also attend his dental practice. I have referred a number of colleagues to Dr. Keen and this also resulted into a domino effect. His professionalism and expertise combined with excellent and friendly service doesn't make me think twice in making referrals and recommendations. I am even referring him to my sister who is visiting from England. This is why it is no surprise he and his team exceeds expectations, highly reputable and one of the leading dental practice in San Diego. More power to Dr. Keen.

Overall Rating

I'm new to this area and I decided to go to Keen Dentistry. That is probably the best decision I could've made. The staff is super friendly and they make you feel comfortable immediately. They are very knowledgable about what you can do at home and some of the products you should be using. They also take great care in getting to know you so your experience with them is more than just an appointment.

Overall Rating

My dental experience at Keen Dentistry has always been nothing short of positive. The staff is friendly, professional, and does great work on my teeth. In the rare times when a dental emergency has arose, they always find time to squeeze me in for an appointment on short notice. The office has modern amenities (iPad to listen to music on, flat screens showing nature DVDs on the ceiling while your dental work is getting done...not to mention the actual X-ray and dental equipment that they use). I always feel at ease when I go in for my visits. I have been going to Keen Dentistry for years and can't see myself going anywhere else!

* Reviews have been sourced and collected through a mix of verified Doctible patients and other publicly available directories.

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