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Anatomic Sciences: Palatal Development in Embryonic Development

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Anatomic Sciences: Palatal Development in Embryonic Development

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Questions and Answers

At what stage of embryonic development do the facial swellings arise?

6th and 8th weeks

3rd and 5th weeks

4th and 6th weeks (correct)

5th and 7th weeks

What is the primary palate formed by the fusion of?

Maxillary and lateral palatine processes

Mandibular and 2 maxillary processes

Lateral nasal and 1st pharyngeal arch processes

Medial nasal and maxillary processes (correct)

What is the result of fusion between the palatal processes growing from the oral surfaces of the maxillary processes?

Formation of the primary palate

Formation of the uvula

Formation of the nasal septum

Formation of the secondary palate (correct)

What type of bone develops in the primary palate?

Membrane bone (C) Signup and view all the answers

Which part of the palate does not become ossified?

Posterior portions of the lateral palatine processes (C) Signup and view all the answers

What indicates the line of fusion of the lateral palatine processes?

Palatine raphe (C) Signup and view all the answers

What is the last portion of the palate to form?

Soft palate and uvula (D) Signup and view all the answers

What is the potential result of a faulty merging and fusion site?

Facial cleft or cleft palate (D) Signup and view all the answers

At what week of intrauterine life does the first sign of tooth development occur?

6th week (A) Signup and view all the answers

What is the origin of cells that form tooth germs?

Ectoderm of the first pharyngeal arch and ectomesenchyme of the neural crest (B) Signup and view all the answers

What is the next stage of tooth development after the initiation/bud stage?

Cap stage (A) Signup and view all the answers

What happens to the ectomesenchymal cells during the cap stage?

They stop producing extracellular substances (C) Signup and view all the answers

What is the function of the dental lamina?

It connects the developing tooth bud to the epithelial layer of the mouth (C) Signup and view all the answers

Which of the following forms the enamel?

Enamel organ (A) Signup and view all the answers

What is the function of the dental sac or follicle?

It gives rise to the supporting structures of a tooth (D) Signup and view all the answers

During which stage does the tooth bud grow around the ectomesenchymal aggregation?

Cap stage (B) Signup and view all the answers