Final answer:
In a malpractice suit against a dentist, the four D that must be present are duty, dereliction, direct cause, and damages.
Step-by-step explanation:
In a malpractice suit against a dentist, the four Ds that must be present for the suit to be successful are duty, dereliction, direct cause, and damages. Damages refer to the harm or injury that the patient suffered as a result of the dentist's negligence. It is an essential element in proving negligence and seeking compensation.