pH changes of root dentin following root canal filling with three different calcium silicate-based cements over 4-week period.
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Abstract
Objective: To evaluate the pH changes in root dentin after root canals were filled with ProRoot MTA, Bio-MA or Biodentine at different root levels and times.
Materials and Methods: Fifty-three extracted single-rooted mandibular premolars were instrumented, and three different locations of cavities were prepared on the root surface-two at the middle and one at the apical root levels. Three experimental groups (n=16) were filled with ProRoot MTA, Bio-MA or Biodentine, while a control group (n=5) was filled with deionized water. pH measurements were taken at 2 hours, 1 day, 1-4 weeks. Analysis was performed using the three-way mixed ANOVA (p< 0.05).
Results: Significant alkaline pH changes occurred over a 4-week period in experimental groups at all root levels (p < .001). The Bio-MA group exhibited the highest pH value (9.18) at 1 week at the apical root level and 1 day at the inner middle root levels. The highest pH values for ProRoot MTA and Biodentine groups were 9.12 and 9.07 at 2 weeks and 2 hours at the inner middle and apical root levels, respectively. Notably, the pH values at the outer middle root level were the lowest.
Conclusions: Alkaline pH changes in root dentin persisted for 4 weeks, with the highest recorded values ranging from 9.07-9.18. The outer middle root level displayed the lowest pH values.
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