Generally, babies get their first teeth between 5 and 9 months. Normally, the first two are bottom incisors, followed by the top two, then the teeth to either side.
All eight cutting teeth usually come through when the baby is 8 to 9 months old. But remember every baby is different - one baby may have all eight teeth, while another baby has only a few.
Often, there are a few months of rest, before the first molars come through at about 12 to 15 months old, after this come the canines. Baby should have a full set of teeth by around 2 years.
Order of teething for baby/adult teeth
Some babies have no trouble when teething. Most babies, however, show some symptons. The baby may cry more and be more affectionate. He can sometimes be difficult to get to sleep, and sometimes will not eat. Other babies find comfort in a bottle. Teething babies will chew on anything they can get their hands on. Teething babies may produce more saliva, this makes them more drool and possible cough. In the period around the crowning of the baby teeth can also suffer from diaper rash. This is because the stool is more acidic.
The crowning of the molars is often painful for the baby, they can be warm (may get a little fever) and red in the face, especially the cheeks.
You can feel for crowning teeth yourself, by gently running a finger along baby's gums.
Treating the pain
Teething pain can be alleviated a little - teething toys help, allowing baby to bite down on the crowning area. Pharmacies also sell dedicated medication safe for baby. Sometimes all baby needs, though, is a cuddle and some attention.
Teething and breastfeeding
You can continue breastfeeding the baby, but make sure the nipple is far behind the teeth to reduce any problems. If baby bites you, there are tips you can use to help.
As soon as the first tooth is crowning, you should start brushing. Do this daily with a tiny bit of fluoride toothpaste on a soft brush. There are baby / toddler and infant / toddler toothpastes for sale - do not use regular toothpaste. Toothpaste intended for babies, contains fluoride which bonds directly to the teeth. From about one and a half years take them to the dentist to help avoid problems in the future.
Fluoride supplements should not be necessary if the teeth are cleaned this way, unless your dentist recommends it.
From angelababy In Q&A