Development Of Face And Oral Cavity Essay Question And Answers
Describe the development of the face and mention the congenital defects of the orofacial region. (or) Development of palate
Answer:
Developmental of the face:
- The face develops between the 24th and 38th days of gestation.
- The face is derived from the following.
Development of nose:
- The medial nasal processor of both sides together with the frontonasal process gives rise to the nose.
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Upper lip:
- The maxillary processes of both sides grow medially.
- This pushes the medial nasal process medially and merges with that of the opposite side.
- This leads to the formation of the upper lip.
Lower lip:
- The lower lip is formed by merging the mandibular processes.
Primary palate:
- It is formed by the merging of the two medial nasal – processes.
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Nasolacrimal duct:
- The lateral nasal processes are separated by the maxillary process by a deep barrow,
- The epithelium in the floor of it forms a solid core.
- It eventually canalizes to form the nasolacrimal duct.
Facial muscles:
- They are derived from the mesenchyme of the second branchial arch.
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Cheek:
- It is formed by the fusion of the maxillary and mandibular processes.
Oral cavity:
- Around 4th week of intrauterine life, a prominent bulge develops on the ventral side of the embryo.
- Below it, there is a depression called stomodeum.
- The oral cavity is developed from it.
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Congenital defects of the orofacial region:
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