Podcast
Questions and Answers
Why is zinc phosphate cement not used for permanent cementation of translucent restorations?
Why is zinc phosphate cement not used for permanent cementation of translucent restorations?
- It is highly soluble
- It has low strength
- The unreacted zinc oxide particles are opaque (correct)
- It is too flowable
What is the function of a liner in a deep cavity when using zinc phosphate cement?
What is the function of a liner in a deep cavity when using zinc phosphate cement?
- It makes the cement more flowable
- It chemically protects the pulp (correct)
- It increases the working time
- It provides mechanical support
What is responsible for the high strength and low solubility of zinc phosphate cement?
What is responsible for the high strength and low solubility of zinc phosphate cement?
- The thin mix
- The zinc oxide particles
- The thick mix (correct)
- The diluted acid
What is the main disadvantage of using zinc phosphate cement as a permanent cementation for translucent restorations?
What is the main disadvantage of using zinc phosphate cement as a permanent cementation for translucent restorations?
What is the function of a liner in a deep cavity when zinc phosphate cement is used for permanent cementation?
What is the function of a liner in a deep cavity when zinc phosphate cement is used for permanent cementation?
What are the factors responsible for high strength and low solubility of zinc phosphate cement?
What are the factors responsible for high strength and low solubility of zinc phosphate cement?
What is the purpose of a liner under zinc phosphate cement in a deep cavity?
What is the purpose of a liner under zinc phosphate cement in a deep cavity?
What is the main disadvantage of using zinc phosphate cement for permanent cementation of translucent restorations?
What is the main disadvantage of using zinc phosphate cement for permanent cementation of translucent restorations?
What method can be used to increase the working time of zinc phosphate cement?
What method can be used to increase the working time of zinc phosphate cement?
Flashcards are hidden until you start studying
Study Notes
Zinc Phosphate Cement
- Zinc phosphate cement is not used for permanent cementation of translucent restorations because it can show through the restoration, affecting its aesthetics.
Function of Liner in Deep Cavity
- In a deep cavity, a liner is used to protect the pulp and to reduce the amount of zinc phosphate cement needed.
Properties of Zinc Phosphate Cement
- The high strength and low solubility of zinc phosphate cement are due to the formation of a strong crystal structure and the reaction between zinc oxide and phosphoric acid.
Disadvantages of Zinc Phosphate Cement
- The main disadvantage of using zinc phosphate cement for permanent cementation of translucent restorations is that it can show through the restoration, affecting its aesthetics.
Purpose of Liner under Zinc Phosphate Cement
- The purpose of a liner under zinc phosphate cement in a deep cavity is to protect the pulp and reduce the amount of cement needed.
Factors Responsible for Properties of Zinc Phosphate Cement
- The factors responsible for the high strength and low solubility of zinc phosphate cement are the formation of a strong crystal structure and the reaction between zinc oxide and phosphoric acid.
Increasing Working Time of Zinc Phosphate Cement
- The working time of zinc phosphate cement can be increased by slowing down the reaction between zinc oxide and phosphoric acid, which can be achieved by controlling the temperature, humidity, and ratio of powder to liquid.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
