01:377:303 Lecture Notes - Lecture 12: Mentalis, Muscle Hypertrophy, Anatomical Terms Of Motion
24 Feb 2020
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Straight profile: neutral occlusion: class 1 type. Retro-inclined profile: dorsal occlusion: class 2 type. Antero-inclined profile: ventral occlusion: class 3 type. Put finger on front of teeth and clap teeth lightly. No bouncing or vibration in the upper anterior 6 teeth only neat clack. Vibration means mandible hitting on the upper front teeth and bounding back. No contact between lower/upper front teeth in maximum intercuspation, only between molars and premolars. Biting nails: repeated sliding of the mandible in the same direction. Lead to increased activity of the muscles of mastication. Normally: the upper lip should cover of the upper teeth. Treatment: firm rubber to stretch the lip or stretches: can take 6 months. Opening and closing: check deviations and measure vertical distance between. Lateral deviation: measure deviation of the mandible using the space between the lower central incisors as a reference and marking its terminal locations during lateral deviation.
