Development Of Face And Oral Cavity Essay Question And Answers

Development Of Face And Oral Cavity

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.

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.

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.

Congenital defects of the orofacial region: