Final answer:
A pulp polyp does not typically contain epithelial rests of Malassez but includes proliferating capillaries, fibroblasts, and a mass of collagenous fibers.
Step-by-step explanation:
Histologically, a pulp polyp (chronic hyperplastic pulpitis) is an overgrowth of fibrous connective tissue that often forms in response to chronic irritation and inflammation. The pulp polyp consists of a variety of components, including proliferating capillaries, fibroblasts (the most abundant cell in connective tissue proper), and a mass of collagenous fibers. However, it does not typically contain epithelial rests of Malassez, which are remnants of the Hertwig's epithelial root sheath involved in tooth development and are usually located in the periodontal ligament.