Use Case B to answer The Following questions
CASE B
A 48-year-old woman is being treated by the dental hygienist for the first time. She states that she is in very good health. Clinical examination reveals generalized bleeding of the gingiva with generalized rolled margins, bulbous interdental papillae, and no signs of inflammation of the attached gingiva. A 1-mm zone of attached gingiva on the facials of the mandibular central incisors and a class I furcation on the facial of tooth #30 are noted. She has a 7-mm clinical attachment loss reading on the facial of #30. Radiographs do not reveal the furcation, but a radiopacity that is continuous with the coronal enamel and extends into the furcation is noted. No other attachment loss or bone loss is noted throughout the mouth. Occlusal evaluation reveals no premature contacts or signs of tooth wear.
-Enamel projections on the root surface are attributed to the differentiation of:

Question

Quizplus · Accepted Answer

An enamel projection on the root occurs when cells from Hertwig's epithelial root sheath differentiate into amelobasts and lay down some enamel in the area close to the CEJ. Hertwig's epithelial root sheath is derived from the reduced enamel organ. Cells from the inner enamel epithelium and cells from the outer enamel epithelium migrate apically to form Hertwig's epithelial root sheath. Occasionally, some cells from the stratum intermedium layer of the enamel organ remain next to cells of the inner enamel epithelium. It is believed that these cells stimulate the differentiation of the cells of the inner enamel epithelium to differentiate into ameloblasts and form an area of enamel in the root area.

Use Case B to Answer the Following Questions