Which of the following movement (s) is / are involved in the opening of the mouth?
Correct answer: B. Hinge followed by translation
- A. Only hinge ( rotation )
- B. Hinge followed by translation
- C. Only translation
- D. Translation followed by hinge
Explanation
Normal mouth opening begins with rotation of the condyle in the lower joint compartment and continues with anterior translation of the condyle-disc complex in the upper compartment. Thus, hinge movement is followed by translation.
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