What Is the 3-3-3 Rule for Teeth?
By Dr. Eastwood – Summerbrook Dental & Implants, Fort Worth, TX
Patients sometimes ask me, “What is the 3-3-3 rule for teeth?” This is a helpful guideline many dentists use to teach healthy brushing habits, especially for kids or anyone trying to improve their daily routine. The 3-3-3 rule is easy to remember and can make a big difference in keeping your teeth strong and cavity-free.
Here’s what the 3-3-3 rule means:
Brush your teeth 3 times a day.
Most people brush twice a day, but brushing three times—morning, after school or work, and before bed—gives your teeth even better protection. Every time you eat, bacteria in your mouth create acids that can weaken enamel. Brushing a third time helps clean away food particles and plaque before they cause damage. If brushing three times feels hard at first, even adding a quick brush after lunch can help a lot.
Brush for 3 minutes each time.
Many people don’t brush long enough. Three full minutes gives you enough time to clean every surface of every tooth. That includes the front, back, chewing surfaces, and along the gumline. You can use a timer, play a short song, or divide your mouth into sections and spend about 45 seconds on each. Brushing thoroughly helps prevent cavities and gum inflammation.
Wait 30 minutes (about 3 sets of 10 minutes) after eating before brushing.
This part of the rule is one many people don’t know. Right after you eat, especially if your meal is acidic or sugary, your enamel temporarily softens. Brushing too soon can actually wear it down. Waiting about 30 minutes gives your saliva time to neutralize acids and protect your enamel before brushing.
At Summerbrook Dental & Implants, I talk with patients about simple habits like the 3-3-3 rule because these routines truly prevent many dental problems. Even though I offer advanced treatments—like dental implants, bone grafting, sinus lifts, immediate implants, and full-mouth reconstruction—my goal is always to help you avoid the need for major work whenever possible.
And remember, my office is a no judgment zone. Whether you’ve never heard of the 3-3-3 rule or you’re trying to get back into good habits, I’m here to support you.
So, the 3-3-3 rule means brush three times a day, brush for three minutes, and wait 30 minutes after eating before brushing. These small steps can keep your smile healthier for life.