MDS PREP
The usual metabolic pathway of ingested fluoride involves urinary excretion primarily with the remaining portion found largely in
1) Teeth
2) Muscle
3) Skeletal tissues
4) Liver
Community Dentistry
Answer: 3
Fluoride is absorbed in the gastrointestinal tract and is distributed throughout the body. A significant portion of ingested fluoride is excreted through urine. However, fluoride also accumulates in skeletal tissues, including bones and teeth, where it can contribute to the mineralization process and enhance resistance to dental caries. The skeletal system retains fluoride, which can be beneficial in small amounts but may lead to toxicity if excessive.
Identify the wrong statement regarding shoulder preparation
1) It is perpendicular to the axial tooth preparation
2) Conserves tooth structure compared to other finish lines
3) Mainly recommended in porcelain restorations
4) None of the above
Prosthodontics
Answer: 3
The dark metallic sulfide pigmentation of gingiva can be removed to some ex tent by
1. treating with oxygen
2. treating with chiorhexidine
3. gingivectomy
4. treating with chlorides
Periodontics
Answer: 1
All of the following features are seen in asbestosis except:
1. Diffuse pulmonary interstitial fibrosis
2. Fibrous pleural thickening
3. Emphysema
4. Calcific pleural plaques
Caldwell-Luc operation indicated in
1) Chronic maxillary sinusitis
2) Fracture floor of the orbit
3) Vidian neurectomy
4) All of the above
Oral medicine
Answer: 4
Which of the following cements bonds to tooth structure, which has an anticariogenic effect, has a degree of translucency and does not irritate the pulp?
1) Polycarboxylate cement
2) Resin cement
3) Silicate Cement
4) Glass ionomer cement
Dental Materials Answer: 4
Chelation of carboxyl groups of the polyacids with the calcium in the apatite of enamel and dentin is the main mechanism through which glass ionomer bonds to tooth structure.
Glass ionomers release fluoride which results in the inhibiton of the progression of secondary caries. GIC is relatively biocompatable.
They elicit a greater pulp reaction as compared to ZnoE but generally less compared to zinc phosphate cement.