Of course,
BUT if it requires specific training and/or schooling it may well require many years,
and possibly the loss of some or all the time spent in dental school.
earth science
Cancer.
Emergency Medicine
Mycologists study fungi.
biology Animal Medicine and Health.
orthodontist. Braces seem to be a good place to make some money
A doctor can specialize in a certain field by completing residency requirements in that field. In addition, they can also complete a fellowship in another sub speciality.
Science is too broad of a topic to tackle as a whole.
There are quite a few dentist who specialize in this field of dentistry. One highly credited doctor in the Memphis, Tennessee area is Erica Polk, DDS.
the field of study of a dentist is the inside of a mouth.
Do you mean a periodontist?... You need to have graduated with a bachelors in some field of science (usually). Then apply to dental school, four years of that, and then you have to specialize in periodontics, another couple of years.
If you want to obtain a science degree, you should look into colleges that specialize in the field of science and technology. For example, California Tech and MIT are excellent options.