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Azerbaycan Saytlari

 »  Home  »  Endodontic Articles 7  »  A preliminary study of the percentage of gutta-percha-filled area in the apical canal filled with vertically compacted warm gutta-percha
A preliminary study of the percentage of gutta-percha-filled area in the apical canal filled with vertically compacted warm gutta-percha
Results.



The results for canal area and PGFA are shown in Table 1, and those for gutta-percha extrusion in Table 2. Guttapercha was apically extruded in 7 of the 60 roots (12%). The canal area varied from 0.15 to 0.69 mm2, with an average of 0.30 mm2.When heat was applied 2 mm from the AF, the PGFA in the root canal at 1.5 mm from the AF reached 100% in 21 roots (70%). When heat was applied 4 mm from the AF, however, the PGFA reached 100% in only four roots (13%). The 2-mm group had larger canals than the 4-mm group (Table 1), but the difference was not statistically significant (P ј 0.078). Although it is difficult to achieve high PGFA in large canals, the average of the PGF As achieved in the 2-mm group was 96.1% (Figs 1and 2), as compared with 87.0% in the 4-mm group (Figs 4 and 5). Of the 25 teeth in which the PGFA reached100% (21from the 2-mmgroup and 4 from the 4-mm group),5 (20%) had gutta-percha extrusion; of the 35 teeth in which the PGFA was <100% (9 from the 2-mm group and 26 from the 4- mm group), 2 (6%) had gutta-percha extrusion.

Table 1. Percentage of PGFA in root canal at1.5 mm from AF.

Percentage of PGFA in root canal at1.5 mm from AF

Table 2. Results of apical extrusion of gutta-percha (AEGP).

Results of apical extrusion of gutta-percha

Figure 1. Across-section from the 2-mm group. The canal area was 0.32 mm2, larger than a #60 file. Perfect adaptation of gutta-percha was demonstrated by a PGFA of 100% (original magnification 50x).

Perfect adaptation of gutta-percha was demonstrated by a PGFA

Figure 2. Across-section from the 2-mm group. The canal area was 0.40 mm2, equivalent to a #70 file. The PGFA was 99.5% (original magnification 50x)..

Across-section

Table 3. Coefficients for each co variable when the dependent variable was percentage of PGFA.

Coefficients for each co variable when the dependent variable was percentage of PGFA

Table 4. Coefficients for each co variable when the dependent variable was occurrence of gutta-percha extrusion.

Coefficients for each co variable when the dependent variable was occurrence of gutta-percha extrusion

The results of multiple linear regression are shown in Tables 3 and 4. The association between the operator and the PGFA was not significant. However, there was a significant association between the depth of heat application and the PGFA, and between the canal area and the PGFA. No significant association was found between the occurrence of gutta-percha extrusion and any of the factors investigated. The PGF A values in each group were plotted in Figs 6 and 7.