Australian Dental Council (ADC) Practice Test

The lamina dura is anatomically described as the cribriform plate perforated by nutritional canals. This structure is a thin layer of cortical bone that forms the outer wall of the alveolus, which houses the tooth roots. The cribriform plate contains small perforations, or canals, that allow for the passage of blood vessels and nerves, supplying nutrients to the periodontal ligament and the surrounding tissues.

Understanding the anatomy of the lamina dura is essential for dental professionals, as it plays a critical role in supporting the teeth and is often evaluated in dental radiographs. Conditions such as periodontal disease can affect the integrity of this bone, leading to changes that may be visible in imaging studies. Recognizing the lamina dura and its function within the alveolar bone is key to diagnosing and managing various dental issues effectively.