Effect of calcium hydroxide dressing on microleakage of composite restorations in endodontically treated teeth subsequent to bleaching.
OBJECTIVE
This study evaluates the effect of calcium hydroxide dressing on microleakage of composite restorations following non-vital bleaching.


METHODS
A total of 45 sound extracted human maxillary central incisors underwent endodontic treatment. The teeth were randomly divided into three groups (n=15). In group 1, access cavities were restored with composite. In group 2, the teeth underwent a bleaching procedure for one week before being restored with composite. In group 3, following a bleaching procedure, calcium hydroxide paste was placed in the pulp chamber for one week. The teeth were then restored with composite. The specimens were subjected to a dye leakage test. The data was analyzed using Kruskal-Wallis and Mann-Whitney U tests.


RESULTS
There were significant differences between the groups (P<0.0005). No statistically significant differences were found between groups 2 and 3, while the differences between other groups were significant.


CONCLUSIONS
The bleaching agent increased microleakage of composite restorations in non-vital bleaching, whereas microleakage was not found to be increased by calcium hydroxide.
Rahimi
Saeed
S
Department of Endodontics, School of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Shahi
Shahriar
S
Kimyai
Soodabeh
S
Khayyam
Lali
L
Abdolrahimi
Majid
M
D001458:Bandages; D002126:Calcium Hydroxide / Q000494:pharmacology*; D003763:Dental Leakage / Q000139:chemically induced*; D006801:Humans; D014073:Tooth Bleaching; D019553:Tooth, Nonvital
D002126:Calcium Hydroxide