Calcium hydroxide has limited effectiveness in eliminating bacteria from human root canal when assessed by culture techniques
AIM To determine to what extent does calcium hydroxide intracanal medication eliminate bacteria from human root canals , compared with the same canals before medication , as measured by the number of positive cultures , in patients undergoing root canal treatment for apical periodontitis ( teeth with an infected root canal system ) .
Investigation of pH at different dentinal sites after placement of calcium hydroxide dressing by two methods.
OBJECTIVE The dentin pH at different sites following placement of calcium hydroxide paste using 2 different methods was evaluated . STUDY DESIGN One hundred twenty Extracted teeth were instrumented and r and omly divided into 6 different groups . Then they were dressed with calcium hydroxide by 2 different methods using paper points or Lentulo spiral , according to their respective groups , and stored . After the experimental period of time , half of the sample s were cut transversally into slices and the other half split longitudinally and rinsed with distilled water . The dentin pH of cervical , middle , and apical thirds was measured from the root canal wall surface and 1 mm away from the root canal lumen in the inner dentin . The results were compared and statistically analyzed . RESULTS The highest pH values were obtained on the root canal walls when the calcium hydroxide was placed with Lentulo spiral filler ( P > .05 ) . There was a significant reduction in pH values in the inner dentin . When the cross sections of teeth were compared at 7 days , the Lentulo group was statistically different only in the apical third . CONCLUSIONS Placement of the calcium hydroxide paste with a Lentulo spiral with subsequent compaction with the blunt end of a sterile paper point obtained a higher pH value on the canal walls and in the inner dentin than paper points only
Calcium hydroxide has limited effectiveness in eliminating bacteria from human root canal when assessed by culture techniques
AIM To determine to what extent does calcium hydroxide intracanal medication eliminate bacteria from human root canals , compared with the same canals before medication , as measured by the number of positive cultures , in patients undergoing root canal treatment for apical periodontitis ( teeth with an infected root canal system ) .