Biomechanics Flashcards
T/F: Hydrophilic primers are attached to hydrophobic substances to allow for attachment to other hydrophilic surfaces.
True
What does it mean to have a high contact angle?
The two surfaces experience poor wetting.
T/F: For good wetting a low contact angle is preferred.
True
What is corrosion?
Spontaneous oxidation of metals
What are the different types of corrosion?
Galvanic, Structure Selective, Crevice, Stress
How are ceramics corroded?
Water and acid
How are polymers corroded?
Absorption of water causes dimensional changes
Degradation products can be related to toxicity. Some examples are?
Mercury and bisphenol-A
What is the difference between modulus and toughness?
Modulus = resilience to bend
Toughness = resilience to break
What is creep?
Deformation due to low constant stress
T/F: Teeth are not completely rigid?
True.
Leads to sub clinical movements
Explain buccal-lingual rigidity?
The cusps on the buccal and lingual side balance out the forces. Harder for them to work together with cavity prep.
