You will have to be accepted by a Dental school.

There are about 55 US dental schools. They will require you to sit an examination called the DAT or Dental Admission Test. You will also have to have satisfied the other admission requirements:

90% of first-year dental students have previously completed four years of pre-professional education, and 82% of first-year dental students have received a baccalaureate degree prior to dental school enrollment.

The DAT exam is normally taken in the third or fourth year of your college education. It encompasses science topics covered at your undergraduate institution, such as Biology, General Chemistry, and Organic Chemistry. You will be tested on Mathematics, and your ability to read. There is also a Perceptual Ability Test, which assesses your ability to manipulate objects mentally.

The examination can be done online, and it has these sections:

90 Minutes Sciences (Biology, General Chemistry, Organic Chemistry)

60 minutes Perceptual Ability Test

60 Minutes Reading Comprehension

45 Minutes Quantative Reasoning Test

You could also train and qualify at an institution outside the US which grants qualifications recognised by the American Dental Association.

the best way to write a good essay is to write ur heart out. just write what u feel. and do practice on writing essays and stuff.

second paragraph: state what college you plan to go to, any internships you are interested in, plans after you graduate (open your own office, do charity dental work for the poor, etc.)

third paragraph: sum up the paper