The two major problems with posterior composite resin materials are
A: A.
wear resistance
B: B.
bulk fracture due to lack of tensile strength
C: C.
difficulty in attaining a good proximal contact
D: D.
difficulty in sealing the gingival margin of a class II preparation
E: E.
precise color matching
A: A.
wear resistance
B: B.
bulk fracture due to lack of tensile strength
C: C.
difficulty in attaining a good proximal contact
D: D.
difficulty in sealing the gingival margin of a class II preparation
E: E.
precise color matching
举一反三
- Which<br/>of the following options is not the difficulty faced by AI in the “AI<br/>winter” ____? A: Lack<br/>of computational power B: Difficulty<br/>of problems C: Lack<br/>of researchers D: Limitation<br/>of theory
- 拉伸强度的英文是 A: tensile strength B: tensile yield C: elongation at break D: tensile fracture stress
- Which of the following is NOT considered as a property of asphalt concrete? A: Thermal cracking resistance B: Tensile strength C: Compressive strength D: Fatigue crack resistance
- The majority of composite use two consistuents: （） A: matrix B: fiber C: resin D: reinforcement
- Fiber reinforced polymer mainly refers to composite materials. If carbon fiber is embedded in epoxy resin, the strength of the composite will be increased.