there are medical codes and sometimes insurance companies will deny codes you charged because you don't have your MD or MD license.
Its essentially a note that says you went through CC/HPI/ROS/PE/labs/imaging A/P. Doesn't matter for dental notes. Matters for hospital based practices/notes that bill medical insurance. You can do the same in a private office but the insurance company you bill might give you **** for being just a dentist and not pay it.
Also matters for TMJ, cancer, trauma etc. these take longer to document and are a reason for the medical notes as treatment is usually delayed intervention or nothing but something has to be billed.