Dental OSCE (Objective Structured Clinical Examination) Practice Exam

Which of the following diseases is associated with the loss of Lamina Dura?

1. Osteomalacia

2. Hyperparathyroidism

3. Both Osteomalacia and Fibrous dysplasia

4. Paget's disease only

The correct answer is: Both Osteomalacia and Fibrous dysplasia

The correct choice highlights that both osteomalacia and fibrous dysplasia are diseases associated with the loss of lamina dura. Osteomalacia, a condition characterized by the softening of bones due to vitamin D deficiency, leads to a weakening of bone structures, which can result in the loss of the lamina dura, the dense bone that outlines the tooth socket. When the integrity of bone is compromised, as in osteomalacia, changes in the radiographic appearance of the alveolar bone, including the lamina dura, can be observed. Fibrous dysplasia is another condition that affects bone structure. In this disorder, normal bone is replaced with fibrous tissue, which can also cause a loss of the lamina dura. The abnormal growth can lead to the alteration of the supportive bone structure, thus impacting the appearance and density of surrounding alveolar bone. The other options do not encompass both diseases. Hyperparathyroidism primarily leads to bone resorption due to increased levels of parathyroid hormone, affecting the lamina dura but does not necessarily encompass both conditions mentioned. Paget's disease, characterized by abnormal bone remodeling, also impacts the lamina dura, but it is only one of the conditions and not a comprehensive answer covering multiple