NEET MDS Shorts
97122
Oral Pathology
30817
Dental Materials
one ot the main adanhtges of GIC as a restoratie material was its ability to form chemical bonds with the tooth structure. Bonding in GIC primarily invokes chelation of carboxyl groups of the polyacids sith the calcium in the apatite of enamel and dentin. Bond rength of enamel is always greater than that of dentin due to higher mineral content. The bonding is improved by the removal of the debris layer called smear layer’ by a process called conditioning.
24351
EndodonticsObturation of root canal should achieve all the mentioned objectives: 1) Tug-back - indicates proper fit and resistance form of the master cone, 2) Hermetic seal - prevents microleakage and bacterial penetration, 3) Fluid-free seal - eliminates pathways for tissue fluids that can support bacterial growth, 4) Additionally should provide: complete filling of canal system, biocompatibility, and dimensional stability. These objectives work together to ensure long-term success by eliminating bacterial contamination and preventing reinfection of the periapical tissues.
93915
Biochemistry
The enzyme phosphatidate phosphatase converts phosphatidic acid to diacylglycerol during synthesis of triacylglycerides. The function of adipose tissue is the storage of fatty acids as triacylglycerols in times of plenty and the release of fatty acids during times of fasting or starvation. Fatty acids taken in by adipocytes are stored by esterification to glycerol-3-phosphate. Glycerol-3-phosphate is derived almost entirely from the glycolytic intermediate dihydroxyacetone phosphate through the action of glycerol-3-phosphate dehydrogenase. Glycolytic enzymes are active in adipocytes during triglyceride synthesis, but those of glycogen degradation (low levels in adipocytes) and gluconeogenesis (ie, glucose-6-phosphatase) are not. Glycerol kinase is not present to any great extent in adipocytes, so that glycerol freed during lipolysis is not used to reesterify the fatty acids being released. The enzyme triacylglyceride lipase is turned on by phosphorylation by a cyclic AMP-dependent protein kinase following epinephrine stimulation.
53604
RadiologyIntensifying screen is used in extraoral radiographs to decrease patient radiation.
76583
ProsthodonticsRigid 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.
95726
General MedicineChlorambucil is an alkylating agent that is commonly used as the first-line treatment for chronic lymphocytic leukemia (CLL). It is effective in managing the disease and is preferred due to its favorable side effect profile compared to other chemotherapeutic agents.
21318
ProsthodonticsThe main drawback of metallic denture bases in distal extension situations is that they cannot be easily relined when ridge resorption occurs. Metal bases require complex laboratory procedures for relining, unlike resin bases which can be chairside relined. This limitation makes adjustment to tissue changes difficult and expensive.
56323
Oral SurgeryThe mental foramen is found on the buccal aspect of the mandible, typically between the first and second premolars or the second premolar and the first molar. The opening of the mental foramen is directed backward and lateral, allowing the mental nerve to exit and innervate the lower lip and chin.
99161
NEETMDS
Alkaline phosphatase is an enzyme associated with calcification and is present in the stratum intermedium layer of the enamel organ during tooth development.