Bone adjoining the periodontal ligament that contains numerous Sharpey's fibers is designated as______________?
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Answer: B. Bundle bone
Explanation
Bundle bone is the specialized alveolar bone proper containing Sharpey's fibers. Periodontal ligament fibers embed directly into this dense bone matrix. It provides the attachment mechanism securing the tooth in its socket. The periodontium consists of cementum, periodontal ligament, and alveolar bone. Sharpey's fibers are the terminal portions of principal collagen fibers. Alveolar bone proper lines the tooth socket and appears radiopaque.
Orthodontic tooth movement relies on resorption and deposition of bundle bone. Periodontal disease destroys bundle bone and disrupts fiber attachment. Clinicians examine lamina dura radiographically, which corresponds to bundle bone. Lamina dura is a radiographic term for alveolar bone proper. Lamina propria is a connective tissue layer found beneath oral epithelia. Lamina densa is a basement membrane component rather than alveolar bone.
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