Oh K.,
You poor dear! Two kids getting molars--what fun! Here is the info our dentist gave us on molars:
BABY TEETH:
Upper teeth--
eruption date of "first" molar: 13-19 months............. shedding date: 9-11 years
eruption date of "second" molar: 25-33 months....... shedding date: 10-12 years
Lower teeth--
eruption date of "first" molar: 14-18 months............ shedding date: 9-11 years
eruption date of "second" molar: 23-31 months....... shedding date: 10-12 years
ADULT (PERMANENT) TEETH:
Upper teeth--
eruption date of "first" molar (which would take place of "second" baby molar): 6-7 years
Lower Teeth--
eruption date of "first" molar: 6-7 years
In answer to your question about ages and names of teeth, they aren't the official names for those teeth. The "6 Year Molar" is the first adult molar. It has been nicknamed "6 year" because that is typically when they come in--the child's 6th year. But certainly do not worry! All of the molars (except wisdom teeth) are supposed to be in by age 13, if you look at the averages. I didn't get all of mine until well into high school. If you continue to have concerns, it certainly couldn't hurt to have a pediatric dentist thoroughly explain it to you. The limited information that I provided to you above is from a diagram from our dentist. It has a drawing of a child's mouth and an adult's mouth, and below is written every name of every tooth, average shedding dates, and average eruption dates for each one. It is titled "Growth Chart for Teeth." I'm sure that your dentist must have something similar--or would be able to direct you to where you would find such a chart. I have found it invaluable with both of my children.
After the "6 year" molars are in:
Upper teeth--
first premolar (first bicuspid): 10-11 years
second premolar (second bicuspid): 10-12 years
canine (cuspid): 11-12 years
second molar: 12-13 years
third molar: 17-21 years
Lower teeth--
canine (cuspid): 9-10 years
first premolar (first bicuspid): 10-12 years
second premolar (second bicuspid): 11-12 years
second molar: 11-13 years
third molar: 17-21 years
Also included with my information is the American Dental Hygienists' Association website. www.adha.org It is certainly worth a visit. I wish you the best with this. Some kids have no issues at all with teething, others can be miserable. Our first child has had some easy ones, some difficult. Number two has been terrible with each and every one. My thoughts and prayers are with you.