As a dentist,the most frequently asked questions are “Doctor,Why does teeth get decayed I brush my teeth twice a day”
And as a dentist I just put a smile on face and say “Be true to your teeth and they won’t be false to you”
So the question is Why does teeth get decayed and the answer is


Tooth decay, also known as dental caries or cavities, is a breakdown of teeth due to acids made by bacteria.The cavities may be a number of different colors from yellow to black.


There are a number of steps required for cavities to form, starting from the loss of tooth mineral (demineralization) to eating all the way through the tooth to cause a cavity.
Tooth decay also occurs when foods containing carbohydrates become trapped between teeth and are not completely removed with brushing and flossing.


1. Poor Oral Hygiene:
– Not brushing your teeth regularly allows plaque to build up and attack on enamel surfaces.

2.Plaque Formation:
-Plaque is caused when bacteria, acid, food particles, and saliva all combine in your mouth. This plaque adheres to your teeth and builds up over time. The acid in plaque attacks the enamel of your tooth and eventually can cause holes in your teeth, otherwise known as cavities.

3.Dry Mouth:
-Saliva helps wash plaque from the teeth. If you have a dry mouth with very little saliva, plaque may build up more quickly.

4.Eating and Drinking:
– This is where it all begins. Since we all have to eat and drink to live, there’s no way to avoid this, but it does play a significant role in the formation of cavities. When you eat or drink, carbohydrates remain on your teeth until you brush. Even after brushing, you may not be able to remove all food particles or carbohydrates from your teeth. Foods that tend to cling to your teeth can increase your risk for a tooth cavity. Be sure to brush your teeth regularly, especially after drinking milk or soda, or after eating dried fruit, dry cereal, hard candy, caramel, taffy, raisins, sugary cereals, cookies and breath mints.

5.Bacteria and Acid:
– While most people don’t like to think about it, bacteria naturally live in your mouth. When these bacteria digest the carbohydrates that linger on your teeth and in your mouth, acid forms.

6.Medical Problems:
-It can contribute to a tooth cavity by causing acid from your stomach to flow back into your mouth. Similarly, bulimia increases the risk of a tooth cavity when the teeth are exposed to stomach acid during frequent vomiting. In addition, some types of cancer treatment that expose the head and neck to radiation can promote a tooth cavity by changing the makeup of the saliva to promote increased bacterial growth.


The earlier symptoms are identified, the quicker and easier the cavity treatment will be. Tune in to your teeth, and be on the lookout for these cavity symptoms:

– A toothache is one of the most common cavity symptoms.

-Both increased tooth sensitivity and pain when biting down can indicate a cavity.

– Cavity symptoms may include a noticeable hole or pit in the affected tooth. Sometimes the holes are only visible on a dental x-ray.

– One of the more serious and obvious cavity symptoms is pus around a tooth.

Other common signs of a cavity that you will likely notice on your own include a toothache or sensitive teeth—particularly when eating sweet, hot or cold foods or drinks. These signs of a cavity are usually associated with advanced tooth decay and therefore require immediate attention from a dental professional.


Just as you learned from above facts prevention is the best way to avoid a cavity. There are many measures you can take to help prevent the formation of a dental cavity or other types of tooth decay and damage. The first step in preventing a dental cavity is to start and keep up with a comprehensive oral hygiene routine. While this can sound overwhelming, once it becomes a habit, you’ll be pleased to enjoy the healthy mouth and beautiful smile that comes with good oral hygiene. Here are some important tips to help prevent tooth decay and cavities.

1.Brush more often:
– Just because your dentist says to brush twice a day doesn’t mean you have to stop there. One great way to prevent the formation of plaque that causes cavities is to brush after every meal or snack. This is the golden rule of oral hygiene. Brushing after you eat or drink with a fluoride-based toothpaste can help keep your teeth clean and free of plaque that leads to tooth decay and cavities.

2.Limit your intake of sugary foods and drinks:
-Candy, sodas and other sugary foods contain sugars that help plaque-forming bacteria survive in your mouth. In addition, sugary foods or candies that stay in your mouth for longer periods of time can also have a greater impact in the formation of plaque and tooth decay. If you do indulge, brush your teeth after eating to help prevent the progression of tooth decay.

3.Watch What You Eat:
-Foods that get stuck in your teeth, such as chips, candies, or cookies can also aggravate tooth decay. Opt to snack on raw fruits and vegetables as much as possible because they can actually help remove plaque by naturally “scrubbing” your teeth. They’re also healthier for your body.

4.Floss and Rinse daily:
– While good brushing is critical, it won’t necessarily do the job alone. Flossing daily and using a mouth rinse that protects against plaque build-up will help reduce your risk for developing problems. Flossing removes the food particles that get lodged in between your teeth and slowly cause plaque build-up that leads to cavities.

5.Protect Your Teeth with Fluoride:
-Protection is key in preventing tooth cavities; fluoride is known to prevent tooth decay. Ensure your water contains a safe level of fluoride, and use products that contain fluoride.

6.Dental visits:
-Visiting your dentist every six months will save your teeth from unregonised cavities and extensive dental procedures.