أسنان القاهرة 🦷

๋࣭ ⭑⚝ ๋࣭ ⭑ give reason :

𔓘 yield strength is of greater importance than ultimate strength (48-49)

𔓘 heating the restoration does not decrease its modulus of elasticity (50)

𔓘 long span bridges must be made of materials with high modulus of elasticity (51)

𔓘 high modulus of elasticity is an advantage in dentistry (51)

𔓘 impression materials need to be highly flexible (51)

𔓘 orthodontic wires need to be resilient (54)

𔓘 it is important to know the impact strength of a material (57)

𔓘 hardness is an advantage and a disadvantage (61)

𔓘 scratching soft materials should be avoided (61)

𔓘 amalgam undergoes creep (64)

𔓘 ceramics do not undergo creep in the oral cavity (64)