Coronal Polish Certification Practice Test

The term 'fulcrum' refers to the placement of which finger when holding an instrument?

1. First

2. Second

3. Third

4. Fourth

The correct answer is: Third

The term 'fulcrum' specifically refers to the point of support or leverage that allows for effective manipulation of an instrument during a procedure. In the context of dental procedures, the third finger, often referred to as the ring finger, serves as the fulcrum. It is positioned on the patient's oral structure, providing stability and control while the operator uses the instrument with the other fingers. This placement allows for a pivot point, enabling the operator to reduce hand fatigue and increase precision. Proper fulcrum technique is vital in maintaining a steady hand when performing detailed and potentially intricate tasks, such as coronal polishing, as it promotes both comfort and proficiency. Other fingers do not fulfill the same function in providing that necessary support and stability, which is why the third finger is specifically recognized for this role in dental work.