Brushing your teeth regularly is not the only way of keeping them healthy, and it's certainly not enough. Diet and food choices also play an important role.
Since we were young kids and as we grow up, we've been constantly told by our parents and our kids dentists, general dentist and family dentists that sugary foods are not good for our teeth and we all know they increase tooth decays, both in kids and adults. But what we should eat is definitely as important as what we should not eat. We need enough nutrients during the day to help keep our teeth healthy and our jawbones strong and as pretty much every kids dentist, general dentist and family dentist has told you about 100 times by now, milk is the best source of nutrients that contribute to the health of our teeth.
Almost all mothers know that most of a child's teeth are formed by the time the baby is born. Therefore, it's essential for pregnant mothers to pay more attention to what they eat and what they don't eat to make sure they have enough intake of their required nutrients.  Calcium is probably the most important nutrient needed in forming teeth and jawbones. You can get the enough amount of calcium by drinking milk or taking calcium supplements.
Also, you should not forget that young kids need lots of calcium to support the growth of their jawbones and teeth. As teeth form and mineralize, they need enough calcium and phosphorus to become strong and as this growth takes place over a long period of time, it's essential for kids to have enough calcium intake as they grow and become older.
All kids dentists agree that milk is the best source of calcium and plays an important role in building healthy teeth. Milk also has phosphorus, which helps in building string jawbones. Jawbones hold the teeth in place, and the calcium in the milk gives them enough strength to do so. In addition milk is a good source of vitamins A and D. Vitamin A helps in maintaining the mucous membranes of the mouth and vitamin D increases calcium absorption in the body, therefore, contributes to the growth of teeth and jawbones and keeping them healthy and strong.  

Dental care for kids should start even before their teeth come out. Just because you can't see the teeth doesn't mean that they're not there. Many babies are born with several teeth completely developed in their jaw. Wipe your baby's gums with a soft damp cloth after each feeding. It helps preventing the buildup of bacteria. After the teeth appear, start brushing them with a soft kid's toothbrush twice a day. As a kids dentist I recommend using fluoride toothpastes only when your child is pre-school age. Always use only a small amount of them. Kids usually swallow most of these toothpastes and swallowing too much of them can leave permanent stains on the teeth.
Another one of my concerns as a kids dentist is cavities. Cavities are holes made by bacteria in the teeth and unfortunately are very common in kids. Consuming a lot of sugary foods and drinks increases the risk of cavities. Having your kids teeth regularly checked by one of our dentists at Culver City Dentist, Mar Vista Dentist, West Los Angeles Dentist, Beverly Hills Dentist or any other one of our dental offices helps preventing cavities. Avoid sweets, sticky foods and between-meals snacks and don't forget brushing your kid's teeth.
Baby-bottle tooth decay is another issue for kids. When you put your baby to sleep with a bottle, or your kid just goes around the house with a bottle in his or her mouth, milk or juice in the bottle remain on the teeth and their sugar eats away the enamel, making an ideal environment for the bacteria to gather and grow.
Thumb-sucking is not a danger for your kid's teeth before age 4-6. If your kid still sucks his or her thumb, fingers or pacifier after age 4, ask your kids dentist to watch for signs of any problem. Thumb-sucking could be a problem if it persists by the time permanent front teeth start to appear.
Finally start taking your kids to kids dentist around their first birthday. Regular checkups can help preventing many dental and oral diseases and damage to their teeth. 

Baby teeth usually become loose and fall out at the age 6-7 to make room for the permanent teeth. In some kids it might happen as soon as age 4 or sometimes it can be as late as age 8. You may want to consult with a kid's dentist if your kid has not lost any teeth by age 7. On the other hand, permanent teeth that erupt late are usually stronger as they had stayed longer in the jaw and are more resistant to cavities. Generally girls lose their baby teeth earlier than boys, but for all the kids it should be over by age 12 or 13. Baby teeth are usually lost in the same order they had erupted; first the two bottom front teeth followed by the two top front teeth, lateral incisors, first molars, canines and finally second molars.
Baby teeth are lost as the roots dissolve and clear the way for the permanent teeth. They usually fall out on their own. When the tooth is quite loose but is still hanging, you or your kid can use a tissue and slowly rotate the tooth until it comes out. If the root is completely dissolved, it should come out easily and there is no need to visit a children's dentist. If there is still some root left, don't force the tooth out, the root might break and become infected.
The newly erupted teeth may look bigger than they should, but will become less noticeable as your kid grows. If you think that the teeth are becoming crowded and are erupting too close to each other, consult with a kid's dentist. If your kid needs orthodontic treatment, it's better to start it as soon as possible.  Sometimes permanent teeth erupt before the baby teeth are gone. In that case two rows of teeth are developed (shark's teeth). The baby teeth are pushed by the permanent teeth and usually fall out in a couple of weeks. If they last more than three months, then it's time to consult with a children's dentist. It's better to have your kid's teeth regularly checked by a kid's dentist to make sure everything is in correct order.

I think it was almost a month ago. A nine year old girl came in with her mother, crying hysterically. Apparently she had been at the playground with some of her friends when a swing had hit her and knocked one of her teeth out of her mouth. Fortunately her mother had the presence of mind to find the tooth and put it in some milk. That is the best way to keep the tooth until you get to a dentist; in a container full of milk or saline, and make sure you hold it by the crown, not the root, when you pick it up. If you manage to get to a dentist within half an hour, there is a good chance the tooth can be put back in its place.

Anyways, they had come straight to us and we gave them top priority. The girl, Alicia, wouldn't calm down. She was scared of losing her tooth, and on top of it, she was scared of going to dentists.  It was a tough situation, as we were running out of time to save the tooth. It took our experienced dental assistants some time to calm her down. When she was ready, I did an emergency exam and when I was satisfied that the root was intact and no root canal was needed, I used local anesthetic to make sure she didn't feel any pain and was comfortable while watching her favorite movie on the screen. We managed to save Alicia's tooth and smile. She was excited and happy to have her tooth back and her mother was satisfied that her young girl didn't have to wear dentures for the rest of her life.  

They came back last week for a general check up. The previous good experience at United Dental Care had convinced Alicia to come back. She told me she wasn't scared of going to dentists anymore, and that made my day.