Dentist - St Johns
2220 CR 210 West, Suite 312
St Johns, FL 32259
(904) 825-9960

(904) 825-9960
2220 CR 210 West, Suite 312
St Johns, FL 32259

Try the latest generation of botox and receive a $100 gift card.  

Sign up at the link below to have the $100 gift card mailed to you. Click Here

Bring in the gift card on your appointment date.

Online Dental Education Library

Our team of dental specialists and staff strive to improve the overall health of our patients by focusing on preventing, diagnosing and treating conditions associated with your teeth and gums. Please use our dental library to learn more about dental problems and treatments available. If you have questions or need to schedule an appointment, contact us.

It has long been known that good nutrition and a well-balanced diet is one of the best defenses for your oral health. Providing your body with the right amounts of vitamins and minerals helps your teeth and gums—as well as your immune system—stay strong and ward off infection, decay and disease.

Harmful acids and bacteria in your mouth are left behind from eating foods high in sugar and carbohydrates. These include carbonated beverages, some kinds of fruit juices, and many kinds of starch foods like pasta, bread and cereal.

Children's Nutrition and Teeth


Good eating habits that begin in early childhood can go a long way to ensuring a lifetime of good oral health.

Children should eat foods rich in calcium and other kinds of minerals, as well as a healthy balance of the essential food groups like vegetables, fruits, dairy products, poultry and meat. Fluoride supplements may be helpful if you live in a community without fluoridated water, but consult with our office first. (Be aware that sugars are even found in some kinds of condiments, as well as fruits and even milk.)

Allowing your children to eat excessive amounts of junk food (starches and sugars)—including potato chips, cookies, crackers, soda, artificial fruit rollups and granola bars—only places them at risk for serious health problems, including obesity, osteoporosis and diabetes. The carbonation found in soda, for example, can actually erode tooth enamel. Encourage your child to use a straw when drinking soda; this will help keep at least some of the carbonated beverage away from the teeth.

Adult Nutrition and Teeth

There's no discounting the importance of continuing a healthy balanced diet throughout your adult life.


Dr. John Joyner

Dr. Joyner established St Johns Dental as a cosmetic and family dental practice in 2003.  His goal is to provide high quality dentistry and a caring, gentle environment for his patients.  Dr. Joyner grew up in Mississippi where his father was a United Methodist minister.  Dr. Joyner graduated from the University of Mississippi School of Dentistry in 1991. He is currently also an Instructor for the University of Florida Dental School.  He supervises dental students as they complete their clinical rotations at The Sulzbacher Center in Jacksonville Beach, FL.

Read more about Dr. John Joyner

Questions or Comments?
We encourage you to contact us whenever you have an interest or concern about our services.