Question 22 (part 2) · LDEK · Mandibular movements and articulators
Indicate correct statements:
1) kinematic face bow is based on conventional hinge axis of TMJs, located in external acoustic apertures;
2) axis of condyle rotation is and hinge axis estimated with arbitrary face bow is the same concept;
3) axis of condyle rotation in arbitrary face bow is along the line of lateral eye angle-auricular tragus, 13 mm anteriorly and 5 mm downward from the border of ear tragus;
4) axis of condyle rotation in arbitrary face bow is along the naso-auricular line, 13 mm anteriorly and 5 mm downward from auricular tragus;
5) axis of condyle rotation in kinematic face bow is along the tragion-orbitale line, 13 mm anteriorly and 3 mm downward from external acoustic apertures.
Correct answer is:
2) axis of condyle rotation is and hinge axis estimated with arbitrary face bow is the same concept;
3) axis of condyle rotation in arbitrary face bow is along the line of lateral eye angle-auricular tragus, 13 mm anteriorly and 5 mm downward from the border of ear tragus;
4) axis of condyle rotation in arbitrary face bow is along the naso-auricular line, 13 mm anteriorly and 5 mm downward from auricular tragus;
5) axis of condyle rotation in kinematic face bow is along the tragion-orbitale line, 13 mm anteriorly and 3 mm downward from external acoustic apertures.
Correct answer is:
- A. 1,4.
- B. 1,3.
- C. 1,2.
- D. only 3.
- E. only 5.
Hint
Distinguish an arbitrary hinge axis located by average measurements from a kinematic axis located individually by observing pure rotation.
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