Anterior Vibrating Line: At the junction of immovable hard palate & slightly movable soft palate (cupid bow shape)RECORDING ANT. VIBRATING LINE:- During border-molding – short & vigorous “hah”- Ask the patient to blow through closed nostrils – Valsavan Maneuver- Soft palate should be depressed & inferior*- Hold head at 30° flexion- Fox plane angulation – 30°- While recording soft palate should fall gradually* for easy recordingPosterior Vibrating Line: At the junction of slightly movable soft palate & highly movable soft palate- PPS recording angulation – 30°- It is a straight line*, from one hamular notch to the other- Anatomically – the junction between aponeurosis of tensor veli palatini & muscular portion of soft palate*

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