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Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 4  »  In vivo performance of the new non-instrumentation technology (NIT) for root canal obturation
In vivo performance of the new non-instrumentation technology (NIT) for root canal obturation
Results.



Types of teeth and root canals per tooth (1–4) were equally distributed amongst the various groups ( P = 0.05). The same was true for the distribution of curved canals ( P = 0.05). The PRI Index showed no significant difference between the control group and the NIT-groups.
The root canal fillings of the control group (0.1 0.1 mm) (mean SEM) and those of the NIT/guttapercha group (0.3 0.1 mm) were both overextended when taking the apical constriction as a reference point. Root canal fillings of the NIT/gutta-percha group were statistically ( P < 0.05) significantly longer than those of the NIT-group without gutta-percha. The latter showed slightly underextended root canal fillings (–0.14 0.1 mm) (Fig. 3). The number of gutta-percha cones used with the NIT-obturation technique was weakly correlated with the extension of the root canal filling. Spearman’s Correlation revealed a value of 0.29. Eight per cent of the control group were filled more than 2 mm short of the radiographic apex, with 85% for the NIT and 4.1% when gutta-percha was inserted.
The area of obturation material apical to the apical constriction (=AC) was also evaluated. The mean value was 0.3 0.1 mm 2 for the control group. The value found for the NIT/gutta-percha group (1.0 0.4 mm 2 ) was significantly larger ( P < 0.05) than that of the NIT-group without gutta-percha (0.1 0.01 mm 2 ). No significant differences were found between the control group and NIT/gutta-percha group.

Figure 3. Extension of the root canal filling (mean SEM). Reference point (zero) was the apical constriction AC. Positive values are overextended, negative values are underextended fillings. Significant different values are marked with a line.

Extension of the root canal filling

Figure 4. Obturated area in the apical, middle and coronal part of the root canals (mean SEM). Significant different values are marked with a line.

Obturated area in the apical, middle and coronal part of the root canals

Figure 4 illustrates the fillings within three sections of the root. The teeth obturated with the NIT had the least percentage of complete filling (90.8 2.8%) in the apical part. This result was significantly different from the control group (97.4 0.3%), as well as from the NIT/guttapercha group (99.8 1.0%). In the middle section of the root canal the values for the obturated area ranged from 93.4 0.4% (NIT-group) to 99.9 0.2% (NIT/guttapercha group), the values of these two groups were significantly different ( P < 0.05). In the coronal section, the control group (98.2 0.6%) showed significantly lower values than the other groups ( P < 0.05). As in the apical and middle root sections the NIT/gutta-percha group had the highest scores (100 0%).