A. Fracture of the wire
B. permanent deformation
C. Spring back
D. Increase in stiffness
Related Mcqs:
- Which of the following has the highest modulus of elasticity ?
A. Dentin
B. Enamel
C. Amalgam
D. Composite Resin - The modulus of elasticity is defined as_______________?
A. The stress at the proportional limit
B. The strain at the proportional limit
C. The stress/strain ratio within the proportional limit
D. None of the above - Modulus of elasticity means_______________?
A. Rigidity or stiffness of the material
B. Ability to be stretched with permanent deformation
C. Ductility of a material
D. Malleability of the metal - Which cement base has the highest modulus of elasticity ?
A. Zinc polycarboxylate
B. Polymer reinforced ZOE cement
C. Zinc phosphate
D. Glass inomer cement - Ability of an orthodontic wire to spring back to its original shape is evaluated by_____________?
A. Brittleness
B. Resilience
C. Tensile strength
D. Toughness - Increase in threshold level on applying subthreshold, slowly rising stimulus is known as ___________?
A. Adaptation
B. Accommodation
C. Refractoriness
D. Electrotonus - On applying pressure on angle of jaw while maintaining patent airway which nerve is likely to be damaged_____________?
A. 6th
B. 7th
C. 4th
D. 9th - For dental amalgam, the elastic modulus and tensile strength is______________?
A. 40 Gpa and 60 – 100 Mpa
B. 21 Gpa and 27 – 55 Mpa
C. 350 Gpa and 10 – 120 Mpa
D. 360 Gpa and 125 – 130 Mpa - 18-B Stainless steel orthodontic wire has_______________?
A. 18% Nickel 8% Chrominum
B. 18% Chromium 8% Nickel
C. 18% Chromium 8% Cobalt
D. 18% Carbon 8% Iron - Stainless steel orthodontic wire can be hardened by________________?
A. Tempering
B. Work hardening
C. Age hardening
D. Precipitation hardening
