Despite what you may have heard, dental care doesn’t need to be uncomfortable or painful. The office of Henry A. Knowles, Jr., DMD, PA is dedicated to providing our clients with painless, gentle dentistry that can make even the most resistant individuals enjoy coming to the dentist. We specialize in long-lasting restorations and customized treatment plans for the whole family. We pride ourselves on our excellent customer service, both in our front office and at the dentist’s chair.

Proper dental hygiene and regular preventive care measures are essential not only for the health of your mouth but for your overall health as well. Don’t put off going to the dentist—make an appointment with Dr. Knowles today.

Dr. Henry Knowles Jr. is a proud member of the American Dental Association and the Florida Dental Association. We are insured and locally owned and operated. Our office accepts most insurance plans, and emergency visits are welcome. Please call ahead to make arrangements for your visit. We are currently accepting new patients and lunchtime appointments are available!

Exclusive Offer

New Clients Receive 15% Off

Meet Our Staff

Learn Who We Are

  • Henry A Knowles Jr

    Dr. Henry A. Knowles, Jr. was born in Marianna, FL and was raised in Chipley, FL. Dr. Knowles attended Chipola College and graduated from Troy University with a bachelors degree in Chemistry. Dr. Knowles received his dental degree from the University of Florida.

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What Our Clients Say About Us

  • "“My name is Bobby Hughes and I live in Marianna, FL. I was one of Dr. Knowles’ first patients after he opened his practice in Marianna in 2001. He and his staff are very friendly and they make you feel at ease in his office. Dr. Knowles is always concerned about your dental problems and his work is exceptional.”
    - Bobby Hughes
    – Marianna, FL."
  • "“I cannot say enough good things about this practice. I’ve been a patient of Dr. Knowles since 2004 as have both of my children and husband. Not only is Dr. Knowles a great dentist, he is a perfectionist and takes a lot of pride in his work. He is extremely gentle and tries to make the experience as painless as possible. The staff is also friendly and professional. I recommend this office to all of my friends.”
    - Amy Saunders
    – Marianna, FL"
  • ""Dr. Henry Knowles is the best dentist. He is very particular with his work. You do not get out of the chair until the work is perfect. My husband and I have been using Dr. Knowles for about 13 years. The staff treats you very good."
    - Penny and Charles Sanders
    – Greenwood, FL"
  • ""Dr. Henry Knowles' office is run with calmness, efficiency, quietness and interest. It is led by a man with gentle hands and a gentle spirit."
    - Sandra Peacock
    – Marianna, FL"

Featured Articles

Read about helpful topics


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    Invisalign's® invisible, removable, and comfortable aligners will give you the beautiful straight teeth you've always wanted. And best of all, no one can tell you're wearing them. Invisalign® is great for adults and teenagers. What is Invisalign®? Invisalign® is the invisible way to straighten your ...

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    Frequently asked questions: dental fillings Are dental amalgams safe? Is it possible to have an allergic reaction to amalgam? Is it true that dental amalgams have been banned in other countries? Is there a filling material that matches tooth color? If my tooth doesn't hurt and my filling is still in ...

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    Sealants are liquid coatings that harden on the chewing surfaces of teeth and are showing a great deal of effectiveness in preventing cavities—even on teeth where decay has begun. The pits and grooves of your teeth are prime areas for opportunistic decay. Even regular brushing sometimes misses these ...

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    Your Rights and Responsibilities as a Patient

    Patient Rights You have a right to choose your own dentist and schedule an appointment in a timely manner. You have a right to know the education and training of your dentist and the dental care team. You have a right to arrange to see the dentist every time you receive dental treatment, ...

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    Pain can occur in any number of places in your mouth: teeth, gums, roots, the palate, tongue and jaw. Cavities are a common culprit causing pain. Untreated cavities can impact nerves because of infections of the tooth and gums. Impacted and abscessed teeth and sore jaws from teeth grinding are other ...

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    Simple toothaches can often be relieved by rinsing the mouth to clear it of debris and other matter. Sometimes, a toothache can be caused or aggravated by a piece of debris lodged between the tooth and another tooth. Avoid placing an aspirin between your tooth and gum to relieve pain, because the dissolving ...

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    Your First Dental Visit

    Your first dental visit promises to be a pleasant experience. Making sound decisions about your dental care and oral health is an easy thing to do with the right preparation beforehand: Make a list of questions to ask our office, so you don't forget anything on the day of your appointment. This ...

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    Scaling and Root Planing

    Some cases of acute periodontal (gum) disease that do not respond to more conventional treatment and self-care such as flossing may require a special kind of cleaning called scaling and root planing. The procedure begins with administration of a local anesthetic to reduce any discomfort. Then, a small ...

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    Does mercury in the silver fillings in your mouth pose any long-term health risks? Does fluoride, in spite of everything we've been told since childhood, actually cause more harm than good? What does the latest research reveal about tobacco use on your overall oral health? This section is dedicated ...

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Location & Hours

Our Location

Find us on the map

Lunchtime Appointments Available

Hours of Operation

Our Regular Schedule


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm