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Dental Materials - 3 Questions
Fusion Temperature of Impression Compound should occur above mouth temperature
What is the maximum weight loss allowed for a specimen surface according to the specification?1) 0.04 mg/cmģ2) 0.69 mg/cmē3) 0.23 mg/cmē4) There is no maximum weight loss mentioned
The specification mentions that the weight loss must not be greater than 0.04 mg/cmģ from the specimen surface, which is considered negligible from a clinical standpoint.
Ability of an orthodontic wire to spring back to Its original shape is evaluated by
1) Brittleness 2) Resilience 3) Tensile strength 4) Toughness
Resilience is the amount of energy absorbed by a structure when it is stressed to proportional Limit. The elastic area of the stress-strain graph gives resilience; entire area up to breaking point is a measure of toughness. The slope of straight Line gives Young’s modulus.
MCQ