Which of the following is not true regarding the second number of the instrument formula?
Correct Answer: This number is always 50 or less
Description: The second number of a four-number code indicates the primary cutting edge angle, measured from a line parallel to the long axis of the instrument handle in clockwise centigrades.
The angle is expressed as a percent of 360 degrees (e.g., 85 = 85% x 360 degrees = 306 degrees).
The instrument is positioned, so that this number always exceeds 50.
If the edge is locally perpendicular to the blade, then this number is normally omitted, resulting in a three-number code.
Ref: Sturdevant's art and science of operative dentistry, 4th edition page 311
Category:
Dental
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now