62294

Paroxysmal nocturnal hemoglobinuria is due to an acquired red cell defect, specifically a defect in the cell membrane that makes red blood cells susceptible to lysis.

56822

Norepinephrine is stored at the Postganglionic parasympathetic nerve endings

53257

The half moon shape is ideal for canine rests as it provides adequate support and stability for the removable partial denture.

26641

A luting agent's primary function is to bond the restoration to the tooth and enhance its retention.

11622

Formalin, specifically 10% neutral buffered formalin, is the standard fixative used for preserving biopsy specimens. It helps to maintain the tissue architecture and cellular details, making it suitable for histopathological examination. Ethanol is not typically used for routine tissue fixation as it can cause tissue shrinkage and distortion. Hydrogen peroxide is not a fixative and is used for different purposes, such as disinfection. A 1% formalin solution is too dilute for effective fixation.

54507

Inferior alveolar nerve block is absolutely contraindicated in patients suffering from haemophilia.

53287

Chronic venous insufficiency is characterized by a range of symptoms and physical findings, including varicose veins, pitting edema, and venous ulcers, particularly around the medial malleolus (ankle). These symptoms result from impaired venous return and increased venous pressure in the lower extremities.

59197

Torus palatinus reduction involves removing a bony prominence from the palate. Acrylic splints provide stabilization, protect the surgical site, and prevent hematoma formation. Other conditions like mandibular alveoplasty do not require splints for similar reasons.

66249

98252

Corticotomy-assisted orthodontics increases the speed of tooth movement due to the controlled surgical damage that enhances bone remodeling (Regional Acceleratory Phenomenon).