32487

Silicate-bonded investments use a silica sol binder, and the setting process involves the loss of water and alcohol, leading to a high amount of contraction during both setting and burnout phases. This contraction is compensated for by the expansion of the investment material.

47626

The acrosome contains enzymes such as hyaluronidase and acrosin that are essential for breaking down the zona pellucida, the egg's outermost layer, allowing the sperm to penetrate and fertilize the egg.

92781

Gingivitis is typically associated with plaque-induced inflammation of the gingiva, but not all gingival lesions directly correlate with other periodontal conditions like periodontitis or specific non-bleeding phenomena.

41583

Green discoloration of teeth is seen in erythroblastosis fetalis.

38807

90269

Vasopressin antagonists like tolvaptan are aquaretics

18596

Alpha-fetoprotein is produced primarily by the yolk sac and fetal liver during pregnancy. Its main function is osmotic regulation and it acts as a binding and carrier protein for various substances, including drugs and metals.

58608

Bence Jones proteins are seen in multiple myeloma, not polycythemia vera.

28324

Talon cusp (TC) and dens in dente (DiD) are both developmental anomalies of the teeth, but they differ in their formation and appearance. A talon cusp arises from the palatal or lingual aspect of an incisor tooth, typically in the maxillary central or lateral incisors. It is composed of enamel and dentin, and its shape can vary from a mild bulge to a fully formed cusp that extends to the incisal edge of the tooth. It can be mistaken for a supernumerary tooth on radiographs due to its pointed projection and density.

In contrast, dens in dente is a condition where a tooth has an invagination in its crown that contains a smaller tooth-like structure, known as the "dental lamina," which is enclosed within it. This invagination is usually filled with pulp tissue and dentin, and the internal structure resembles a tooth within a tooth. The smaller structure within the affected tooth can mimic a supernumerary tooth on radiographs, but it is not a separate tooth.

94457

The Snyder test is a microbiological test used to detect the presence of specific bacteria associated with dental caries, primarily Streptococcus mutans. It involves taking a sample of plaque, adding a sugar solution, and observing for the formation of acid that indicates bacterial activity and the potential for tooth decay. It is not used to detect fungal growth on skin or determine the pH of crevicular fluid.