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671 Dental

Porcelain denture teeth

AHave a higher coefficient of thermal expansion than acrylic teeth
BHave a lower abrasion resistance than enamel
CShould be used where the inter alveolar clearance is small
DHave a higher abrasion resistance than gold
Dental
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673 Dental

In primary trauma from occlusion:

AThe blood vessels present in periodontal ligament rupture and release contents in surrounding space
BAdaptive capacity of tissues to withstand occlusal forces is impaired resulting in injury from normal occlusal forces
CThe alveolar bone is not damaged
DBifurcations and trifurcations are less susceptible to injury related to this condition
Dental
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