25176

A black line on the gingiva which follows the contour of the margin is due to mercury.

88685

The pH values provided in the text indicate that zinc polycarboxylate cement reaches a pH of 5.8 after 28 days.

63186

96543

Dry socket (alveolar osteitis) is a painful condition that occurs after a tooth extraction when the blood clot fails to develop or is dislodged. The exposed bone and nerve endings in the socket cause a dull, aching, and continuous or almost continuous pain, which can be moderate to severe. A key characteristic is the absence of significant swelling or signs of infection (like pus or high fever) in the adjacent tissues, distinguishing it from an infection.

83312

Cervical third root fractures have the least favorable prognosis. This is because: 1) The fracture line is at or near the gingival margin, making restoration difficult, 2) Contamination from oral fluids is inevitable, preventing proper healing, 3) Crown-root ratio becomes unfavorable even if healing occurs, 4) Periodontal involvement is common, 5) Often requires extraction due to poor long-term prognosis. Apical third fractures have the best prognosis as they often heal with fibrous union and remain functional, while middle third fractures have intermediate prognosis.

77168

In orthodontics, pitch refers to rotation around the transverse (side-to-side) axis, leading to an upward or downward rotation of the jaws or occlusal plane, which alters the vertical dimension.

80434

The working time for a polysulfide impression material can be safely and effectively increased by cooling the mixing slab to a temperature above the dew point

32417

Tetracycline fibers are the most widely studied controlled release device in periodontal therapy.

10363

The symptoms of slight fever, loss of weight, sore throat, and swollen, stiff, and painful extremity joints in a 13-year-old boy are characteristic of juvenile rheumatoid arthritis (JRA), which is also known as juvenile idiopathic arthritis. Rheumatoid arthritis is a chronic inflammatory condition primarily affecting the joints.

75869

The gastrocolic reflex is a physiological response where the distension of the stomach by food initiates contractions in the rectum, often leading to the urge to defecate.