The odontogenic epithelium responsible for developing a dental cyst is:___________?
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Answer: D. Cell rests of malassez
Explanation
Radicular cysts arise from the proliferation of epithelial rests of Malassez within the periodontal ligament. Inflammatory products diffusing from a necrotic dental pulp stimulate these dormant epithelial cell remnants. Proliferation of the rests eventually forms the epithelial lining of the resulting inflammatory odontogenic cyst. Epithelial rests of Malassez are microscopic remnants of Hertwig's epithelial root sheath persisting in the periodontal ligament. Radicular cysts represent the most common inflammatory odontogenic cysts occurring in the human jaws. Radiographically, they appear as well-defined radiolucencies at the apex of a non-vital carious tooth.
Root canal treatment or tooth extraction eliminates the pulpal irritant, leading to the healing of smaller radicular cysts. Large cysts require surgical enucleation or decompression to ensure complete removal and bone regeneration. Histological examination is always necessary to rule out other cystic or neoplastic jaw lesions. Cell rests of Serre are remnants of the dental lamina that give rise to odontogenic keratocysts or gingival cysts. The enamel organ is responsible for tooth crown development and ameloblastoma formation rather than radicular cysts. Reduced enamel epithelium covers the erupted tooth crown and typically gives rise to dentigerous cysts.
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