Question 464 · LDEK · Tooth discoloration and bleaching
Choose correct sentences concerning the thermocatalytic technique of bleaching:
1) this method can be used at home, by the patients themselves or in the dental office by the staff;
2) the procedure can be performed during one visit;
3) during the procedure 30% perhydrol (hydrogen peroxide) solution is used;
4) light source should be pointed towards the tooth, which should be exposed for approximately 30 minutes at a time;
5) the procedure should be performed only in the presence of lignin rolls, due to the fact that dental dam degenerates when exposed to perhydrol.
The correct answer is:
2) the procedure can be performed during one visit;
3) during the procedure 30% perhydrol (hydrogen peroxide) solution is used;
4) light source should be pointed towards the tooth, which should be exposed for approximately 30 minutes at a time;
5) the procedure should be performed only in the presence of lignin rolls, due to the fact that dental dam degenerates when exposed to perhydrol.
The correct answer is:
- A. only 1.
- B. 2, 3.
- C. 1, 4.
- D. 2, 3, 5.
- E. 2, 4, 5.
Hint
This technique uses high-concentration peroxide activated by heat — consider where it can be done safely and how soft tissues are protected.
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