78604

Zollinger Ellison syndrome is characterized by the presence of a gastrin-producing tumor (gastrinoma) which leads to hypergastrinemia, resulting in excessive gastric acid secretion and subsequent peptic ulcers. Hyperacidity is not a separate component but rather a consequence of increased acid production due to hypergastrinemia.

83381

The onset of action of lidocaine is 3-5 minutes.

50407

Nitinol is a metal alloy – or mixture – of nickel and titanium. This type of wire is also known as “memory wire” or “smart wire,” and it can be used for braces. 

85519

19058

Explanation: According to the WHO classification of dental injuries, pulp exposures due to crown fractures are classified under 873.62. This classification helps in standardizing the terminology used in dental trauma, allowing for better communication and understanding among dental professionals.


873.60 - Pulp Exposure due to Trauma

This code refers to cases where the pulp is exposed as a result of trauma to the tooth. It does not specify whether the pulp is vital or non-vital, but it indicates that there is a direct exposure of the pulp tissue.

873.61 - Avulsion of Tooth

This code is used for cases where a tooth has been completely displaced from its socket (avulsed). In avulsion cases, the pulp is typically exposed, and immediate re-implantation is critical for the best prognosis. This classification highlights the severity of the injury and the need for urgent treatment.
873.62 - Crown Fracture with Pulp Involvement

This code refers to fractures of the crown of the tooth that involve the pulp. It indicates that the fracture has extended into the pulp chamber, necessitating treatment such as root canal therapy.

873.63 - Crown Fracture without Pulp Involvement

This code is used for crown fractures that do not involve the pulp. In these cases, the injury is limited to the enamel and dentin, and the pulp remains intact.

82631

The American Dental Association (ADA) Specification-11 states that the gelation temperature should not be less than 32°C to ensure proper setting and avoid distortion of the impression.

51952

The periodontal ligament contains immature elastic fibers (oxytalan fibers), but mature elastic fibers are not typically present.

45341

EDTA (ethylenediaminetetraacetic acid) is a chelating agent commonly used in endodontics to remove the smear layer and facilitate the enlargement of calcified canals. It helps in dissolving inorganic components of the dentin, making it easier to access and clean the root canal system.

37740

The ATP7B protein is essential for copper excretion from hepatocytes into bile, and its deficiency leads to copper accumulation in the liver and other tissues in Wilson's disease.

91142

The setting mechanism of light-cured resins involves free radical polymerization initiated by light, which causes the material to contract away from the light source (typically the external surface).