What is the primary missing structure associated with fibrous dysplasia?

What is the primary missing structure associated with fibrous dysplasia?

• A. Cementum
• B. Lamina dura
• C. Alveolar bone
• D. Trabecular bone

Answer: (B)

The primary missing structure associated with fibrous dysplasia is the lamina dura. In fibrous dysplasia, normal bone is replaced by fibrous tissue and immature bone, leading to various changes in the affected areas. The lamina dura, which is the thin line of dense cortical bone that surrounds the roots of teeth and supports alveolar bone, may become irregular or absent in areas affected by fibrous dysplasia. This condition affects the integrity of the lamina dura, causing it to lose its normal appearance due to the replacement of healthy bone by fibrous tissue, which compromises its structure and function. Additionally, the impact on the lamina dura is significant, as this structure is crucial for providing stability to teeth. In cases of fibrous dysplasia, the irregularity can be detected radiographically, giving insight into the condition's progression and severity. This is why recognizing the involvement of the lamina dura is key to understanding the clinical implications of fibrous dysplasia.

The primary missing structure associated with fibrous dysplasia is the lamina dura. In fibrous dysplasia, normal bone is replaced by fibrous tissue and immature bone, leading to various changes in the affected areas. The lamina dura, which is the thin line of dense cortical bone that surrounds the roots of teeth and supports alveolar bone, may become irregular or absent in areas affected by fibrous dysplasia. This condition affects the integrity of the lamina dura, causing it to lose its normal appearance due to the replacement of healthy bone by fibrous tissue, which compromises its structure and function.

Additionally, the impact on the lamina dura is significant, as this structure is crucial for providing stability to teeth. In cases of fibrous dysplasia, the irregularity can be detected radiographically, giving insight into the condition's progression and severity. This is why recognizing the involvement of the lamina dura is key to understanding the clinical implications of fibrous dysplasia.