87437

63920

MEN IIB (Multiple Endocrine Neoplasia type 2B) is defined by Medullary Thyroid Carcinoma, Pheochromocytoma, and Mucosal Neuromas/Marfanoid features.

51812

Giant cells are a characteristic histopathologic finding in an aneurysmal bone cyst.

94689

The initial activation of vitamin D3 begins with its synthesis from 7-dehydrocholesterol in the skin when exposed to UV light.

29733

The pacemaker of the heart is the SA (sinoatrial) node. Located in the right atrium, it generates spontaneous electrical impulses at 60-100 beats per minute, initiating each heartbeat. It has the highest intrinsic firing rate, making it the natural pacemaker.

39208

A dental assistant performs duties like assisting during procedures and sterilizing instruments but is not licensed to perform independent treatments.

37086

Trigeminal neuralgia typically involves the maxillary and mandibular divisions more than the ophthalmic division; thus, it is incorrect to state that the ophthalmic division is usually affected first.

43866

The maxillary central incisor typically has a single root and a single, large, and straight root canal. While other teeth like the maxillary canine and mandibular first premolar often have single roots, anatomical variations (such as two canals in a mandibular first premolar) are more common than in the maxillary central incisor.

81264

After periodontal surgery, root sensitivity is primarily due to the exposure of dentin tubules (option 1). When the root surface is exposed, the dentin becomes sensitive to stimuli because the tubules can transmit sensations to the pulp.
Exposed cementum (option 2) is less likely to cause sensitivity because cementum is not as innervated as dentin. Formation of plaque (option 3) can lead to sensitivity as it may irritate the surrounding tissues and contribute to inflammation.

27410

Waters view is the best radiograph for viewing fractures of maxillary bone. It provides excellent visualization of the maxillary complex, including the maxillary sinuses, zygomaticomaxillary sutures, and orbital floors, which are commonly involved in maxillary fractures.