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9 Cards in this Set

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  • Back
In a unilateral incomplete cleft of the lip, palate is not involved, but what structures are involved?
The left and right medial nasal process merge with the frontal nasal process.
What is the columella?
The small vertical column of tissue that separates the nostrils.
What is the philtrum?
the shallow vertical depression in the center of the upper lip.
What are the borders of the philtrum?
the upper border is continous with the columella, and the two raised vertical ridges are fusion of the maxillary processes and the medial nasal processes in the 7th week.
In a unilateral incomplete cleft lip, what is not fused?
No fusion of the maxillary process and the medial nasal process, so therefore no lateral ridge of the philtrum.
Is it possible to have a bilateral cleft lip without a cleft palate?
yes
In a bilateral complete cleft of the lip, what are regions on the primary palate?
prolabium, premaxilla, and the median palatal triangle.
what does the PL, PM and the MPT form?
PL forms the central part of the upper lip.
PM forms the alveolar process, that contain the central and lateral incisors.
The MPT will fuse with the lateral palatine plates of the max. process to form the definitive hard palate.
What is the term for the shallow groove that separates the PL from the PM?
vestibule