ABSTRACT
This cross-sectional survey determined the dental prevalence of apical periodontitis [AP] in selected Iranian population, and evaluated the influence of the quality of root canal treatment [RCT] and their coronal restorations [CR] on the periapical status. A total of 1064 panoramic radiographies were evaluated by two observers during 2009. The quality of RCT i.e. length/density of root fillings and CR in addition to periapical status of endodontically treated teeth were recorded. Their interrelationship was analyzed by Chi-squared, logistic regression and Spearman's rho statistics. Hosmer and Lemeshow tests were used for assessing fitness of logistic regression model and one sample k-s test was used for evaluating of normality of the data. Our results showed that 527 teeth [52%] of the endodontically treated teeth presented with AP radiographically. The percentages of teeth which fulfilled the criteria of an acceptable RCT or CR radiographically were 42.3 and 62.5 respectively. Incidence of AP among teeth with acceptable RCT [29.1%] was significantly lower than those suffering from unacceptable RCT [68.8%] [P<0.001]. Moreover, adequate CR demonstrated a significantly better periapical status [58.6%] compared to teeth with inadequate CR [30.3%] [P<0.001]. The incidence of AP ranged from 25.6% [good qualities] to 79.5% [bad qualities] [P<0.001]. Cases with both unacceptable RCT/CR were 11 times more likely to have AP than cases with acceptable RCT/CR. The quality of RCT and CR were found to impact the periapical health of endodontically treated teeth. There are a significant high number of technically unacceptable endodontic and restorative treatments in Iran; therefore considerable efforts are needed to improve the standards of endodontic and restorative treatments
ABSTRACT
Sealing ability of root-end filling materials is of great importance. It can be investigated by measuring microleakage. The purpose of this in vitro study was to evaluate microleakage of calcium enriched mixture [CEM] cement in two different media including phosphate buffer solution [PBS] and distilled water. Twenty single-rooted human teeth were selected. All teeth were root-end filled with CEM cement. Samples were divided into two groups of 10 each and were placed in PBS or distilled water. The microleakage was measured after 12 and 24 h, 14 and 30 days with Fluid Filtration device. Data were statistically analyzed by repeated measures test. Sealing ability of CEM cement was significantly superior in PBS compared to distilled water [P<0.05]. This study also showed that time had no significant effect on the sealing ability of CEM cement. Media can significantly affect the microleakage of CEM cement. PBS can provide more phosphorous ions for hydroxyapatite formation of CEM cement; therefore, CEM cement can seal more effectively with PBS