Final answer:
In four-handed dentistry, the dentist and a dental assistant work together, with the dentist having both hands actively involved in the procedure, and the assistant providing support.
Step-by-step explanation:
The concept of four-handed dentistry refers to a technique where the dentist and a dental assistant work together in an ergonomically designed systematic approach to dental care. During this procedure, it's essential for the operator, which is the dentist, to have both hands actively involved in the operation, while the dental assistant supports the dentist with tasks such as providing and receiving instruments, managing suction, and assisting with dental materials. This method allows for increased efficiency, decreased patient time in the chair, and helps reduce fatigue for the dental team.