PH CHANGES IN ROOT DENTIN OVER A 4-WEEK PERIOD FOLLOWING ROOT-CANAL DRESSING WITH CALCIUM HYDROXIDE

被引:169
作者
NERWICH, A [1 ]
FIGDOR, D [1 ]
MESSER, HH [1 ]
机构
[1] UNIV MELBOURNE,SCH DENT SCI,FAC MED DENT & HLTH SCI,PARKVILLE,VIC 3052,AUSTRALIA
关键词
D O I
10.1016/S0099-2399(06)80461-9
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Root canals in extracted human teeth were cleaned and shaped and subsequently dressed with a calcium hydroxide root canal dressing. pH Changes in the root dentin were measured over a 4-wk period with microelectrodes in small cavities at apical and cervical levels in inner and outer dentin. The pH increased within hours in the inner dentin, peaking at pH 10.8 cervically and 9.7 apically. However, 1 to 7 days elapsed before the pH began to rise in the outer root dentin, reaching peak levels of pH 9.3 cervically and 9.0 apically after 2 to 3 wk. The results show that hydroxyl ions derived from a calcium hydroxide dressing do diffuse through root dentin. They diffuse faster and reach higher levels cervically than apically. Surface pH measurements showed that hydroxyl ions do not diffuse in more than a minor way through the intact root surface.
引用
收藏
页码:302 / 306
页数:5
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