Anterior vibrating lines can be recorded during impression making by:
Correct Answer: Both 1 and 3
Description: Anterior vibrating line is an imaginary line at the junction of the attached tissue overlying the hard palate and the immediate movable tissue of the soft palate. It is always on soft palate. Due to the projection of the posterior nasal spine, the anterior vibrating line is not a straight line, but takes the shape of a cupid’s bow. It is located by:
Valsalva maneuvre—patient is asked to hold both nostrils and gently blow through the nose. This will place the soft palate inferiorly at the junction of the hard palate and the junction can then be marked.
It can also be located by instructing the patient to say ‘ah’ in short vigorous bursts.
Posterior vibrating line is an imaginary line at the junction of the aponeurosis of the tensor veli palatini muscle and the musculature of the soft palate. It is the demarcation between the part of the soft palate that has limited movement during function and the remainder of the soft palate that is markedly displaced during function. It is a slightly curved line.
It can be located by instructing the patient to say ‘ah’ in short bursts but in a normal, unexaggerated manner.
Key Concept:
Anterior vibrating lines can be recorded during impression making by Valsalva maneuver or by Speaking “ah” in short vigorous bursts. Posterior vibrating line can be recorded by speaking “ah” in short normal and unexaggerated bursts.
Ref: Textbook of prosthodontics V Rangarajan Ed. 2nd
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