NEET MDS Shorts
49144
INI CET
Alginate filler is derived from seaweed, specifically from brown algae. It is commonly used in dental impressions due to its ability to capture fine details.
40100
ProsthodonticsDental porcelain is harder than enamel. Modern dental porcelains have hardness values that exceed natural enamel, which can lead to increased wear of opposing natural teeth. This is why careful occlusal adjustment and selection of appropriate porcelain types are important to minimize excessive wear of antagonist teeth.
40466
Oral PathologyAttrition is the loss of tooth substance resulting from mastication and bruxism.
76050
EndodonticsThe purpose of root canal sealer is to fill the space between solid core material and the pulp canal walls. Root canal sealers serve to: 1) Fill irregularities and accessory canals not occupied by gutta-percha, 2) Create intimate adaptation between core material and canal walls, 3) Provide antimicrobial action in residual bacteria, 4) Seal dentinal tubules to prevent bacterial penetration, 5) Act as lubricant during gutta-percha placement. While sealers may have some biological properties, their primary function is mechanical - filling voids and creating hermetic seal around the core material.
66195
Oral Medicine
Men generally have an earlier onset of coronary heart disease compared to women, and the risk increases significantly after the age of 45.
72434
Dental Anatomy
Well over 50% of maxillary 1st molars have two canals in the mesiobuccal root. Some authors cite the number as high as 90%. There are usually 3 roots and 4 canals in a maxillary 1st molar.
The fourth canal, the mesiolingual canal, is also referred to as: the accessory mesiobuccal canal, mesiocentric, mesiopalatal canal or MB2.
It is usually tough to find MB2 through clinical inspection and it is not obvious on a radiograph. A dentist should expect it is present before beginning a root canal on the first maxillary molar.
98168
PhysiologyThe sodium-calcium exchanger (NCX) is involved in the regulation of calcium levels in cells. It exchanges three sodium ions (Na+) for one calcium ion (Ca2+), thereby helping to maintain intracellular calcium homeostasis.
57633
ProsthodonticsA swing-lock partial denture produces relatively poor esthetic results for patients with short or extremely mobile lips because the mechanical attachment and swing mechanism may be visible during function, especially when lips are short or highly mobile. The visible hardware compromises esthetics in these patients.
62946
ProsthodonticsInstructing the patient to say "ah" with short vigorous bursts will help in visualizing the anterior vibrating line.
16699
ProsthodonticsMost semiadjustable articulators have a fixed intercondylar distance of 110mm.