47202

Cephalometric analysis is a comprehensive tool used in orthodontics to evaluate dental arch symmetry, dental/skeletal relationships, and treatment planning.

98948

Factor II (prothrombin) deficiency leads to a prolonged PT (Prothrombin Time) because it is involved in the extrinsic pathway of the coagulation cascade, which is assessed by the PT test. The aPTT (activated Partial Thromboplastin Time) is normal because the intrinsic pathway is not affected.

76583

Rigid precision attachments are recommended for free-end mandibular partial dentures when opposing a complete denture. The complete denture provides even loading and reduced lateral forces, making rigid attachments appropriate. When opposing natural teeth or other partial dentures, semi-rigid attachments are preferred to accommodate differential movement.

82036

Treacher Collins syndrome is a genetic disorder characterized by specific craniofacial deformities. A key feature of this condition is the underdevelopment (hypoplasia) or absence of the zygomatic complex, which are the cheekbones. This lack of support from the underdeveloped zygoma also causes the palpebral fissures (the opening between the eyelids) to slant downward, not upward. Other features include micrognathia (small jaw) and retrognathia (receding chin). Microstomia can occur, but poorly developed malar bones are a more consistently defining characteristic.

31710

LH is responsible for the transformation of the follicle into the corpus luteum and the initiation of progesterone production during the luteal phase of the menstrual cycle.

45108

MEN-2b includes medullary thyroid carcinoma, pheochromocytoma, mucosal neuromas, and marfanoid habitus. Parathyroid adenoma is a characteristic of MEN-1 and MEN-2a, but is notably absent in MEN-2b.

29277

Polyclonal B-cell activation is responsible for autoimmunity in Epstein-Barr virus infection, leading to various autoimmune manifestations.

17624

Microfilled composites contain very fine silica particles (0.04 to 0.2 µm in diameter), which give them excellent translucency and a high surface area for better filling of small restorations.

89762

69779

A large expansion can take place if the amalgam is contaminated by moisture during trituration or condensation, known as delayed expansion or secondary expansion.