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Comparative evaluation of shaping ability of two nickel-titanium rotary systems using cone beam computed tomography.

Celikten B, Uzuntas CF, Kursun S, Orhan AI, Tufenkci P, Orhan K, Demiralp KÖ - BMC Oral Health (2015)

Bottom Line: Significant differences were found between apical and coronal levels for both systems (p < 0.05) in canal transportation.In comparing the systems, similar values were found at each level, without significant difference (p > 0.05) in terms of canal curvature and volume.Voxel sizes did not affect the measurements on canal volume, curvature or transportation; no significant difference was found between the 0.100- and 0.125-mm(3) voxel sizes (p > 0.05).

View Article: PubMed Central - PubMed

Affiliation: Faculty of Dentistry, Department of Endodontics, Ankara University, Besevler, 06560, Ankara, Turkey. berkancelikten@yahoo.com.tr.

ABSTRACT

Background: We evaluated and compared the effects of different NiTi rotary systems--ProTaper Next and New One Shape--on the volume of dentin removed, canal transportation, and canal curvature in extracted human teeth using CBCT scanning with different voxel sizes.

Methods: Fifty extracted human maxillary first molars with mesiobuccal canal curvature (25-35°) were used. Specimens were instrumented with the ProTaper Next or New One Shape. Pre- and post-instrumentation scans were performed to compare transportation at the levels of 2, 5, and 8 mm and volumes with two different voxel sizes (0.125-and 0.100-mm(3)) using 3D CBCT images. This study evaluated and compare the volume of dentin removed, canal transportation, and canal curvature. Differences according to instrumentation and voxel sizes were assessed using the Mann-Whitney U-test and the Wilcoxon signed-rank test.

Results: Significant differences were found between apical and coronal levels for both systems (p < 0.05) in canal transportation. In comparing the systems, similar values were found at each level, without significant difference (p > 0.05) in terms of canal curvature and volume. Voxel sizes did not affect the measurements on canal volume, curvature or transportation; no significant difference was found between the 0.100- and 0.125-mm(3) voxel sizes (p > 0.05).

Conclusions: Both instrumentation systems produced similar canal transportation and volume changes. The two voxel resolutions also showed similar results, however a 0.125-mm(3) voxel size can be recommend for a flat panel CBCT scanner with lower exposure dose.

No MeSH data available.


Related in: MedlinePlus

Pre- and post-instrumented measurements were made in the mesial and distal directions on cross-section planes from the apical end of the root at levels of (a) 2 mm, (b) 5 mm, and (c) 8 mm.
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Fig2: Pre- and post-instrumented measurements were made in the mesial and distal directions on cross-section planes from the apical end of the root at levels of (a) 2 mm, (b) 5 mm, and (c) 8 mm.

Mentions: Three cross-section planes from the apical end of root at levels of 2, 5, and 8 mm were used. The pre- and post-instrumented shortest distances from the edge of the canal to the periphery in all the roots were measured in the mesial and distal directions using the Planmeca software (Romexis ver. 3.2, Planmeca, Helsinki, Finland). Transportation was calculated according to Gambill et al. [25] study. All constructions and measurements were performed on a 21.3-inch flat-panel color-active matrix TFT medical display (NEC MultiSync MD215MG, Munich, Germany) with a resolution of 2048 × 2560 at 75 Hz and 0.17-mm dot pitch, operated at 11.9 bits (Figure 2).Figure 2


Comparative evaluation of shaping ability of two nickel-titanium rotary systems using cone beam computed tomography.

Celikten B, Uzuntas CF, Kursun S, Orhan AI, Tufenkci P, Orhan K, Demiralp KÖ - BMC Oral Health (2015)

Pre- and post-instrumented measurements were made in the mesial and distal directions on cross-section planes from the apical end of the root at levels of (a) 2 mm, (b) 5 mm, and (c) 8 mm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4358850&req=5

Fig2: Pre- and post-instrumented measurements were made in the mesial and distal directions on cross-section planes from the apical end of the root at levels of (a) 2 mm, (b) 5 mm, and (c) 8 mm.
Mentions: Three cross-section planes from the apical end of root at levels of 2, 5, and 8 mm were used. The pre- and post-instrumented shortest distances from the edge of the canal to the periphery in all the roots were measured in the mesial and distal directions using the Planmeca software (Romexis ver. 3.2, Planmeca, Helsinki, Finland). Transportation was calculated according to Gambill et al. [25] study. All constructions and measurements were performed on a 21.3-inch flat-panel color-active matrix TFT medical display (NEC MultiSync MD215MG, Munich, Germany) with a resolution of 2048 × 2560 at 75 Hz and 0.17-mm dot pitch, operated at 11.9 bits (Figure 2).Figure 2

Bottom Line: Significant differences were found between apical and coronal levels for both systems (p < 0.05) in canal transportation.In comparing the systems, similar values were found at each level, without significant difference (p > 0.05) in terms of canal curvature and volume.Voxel sizes did not affect the measurements on canal volume, curvature or transportation; no significant difference was found between the 0.100- and 0.125-mm(3) voxel sizes (p > 0.05).

View Article: PubMed Central - PubMed

Affiliation: Faculty of Dentistry, Department of Endodontics, Ankara University, Besevler, 06560, Ankara, Turkey. berkancelikten@yahoo.com.tr.

ABSTRACT

Background: We evaluated and compared the effects of different NiTi rotary systems--ProTaper Next and New One Shape--on the volume of dentin removed, canal transportation, and canal curvature in extracted human teeth using CBCT scanning with different voxel sizes.

Methods: Fifty extracted human maxillary first molars with mesiobuccal canal curvature (25-35°) were used. Specimens were instrumented with the ProTaper Next or New One Shape. Pre- and post-instrumentation scans were performed to compare transportation at the levels of 2, 5, and 8 mm and volumes with two different voxel sizes (0.125-and 0.100-mm(3)) using 3D CBCT images. This study evaluated and compare the volume of dentin removed, canal transportation, and canal curvature. Differences according to instrumentation and voxel sizes were assessed using the Mann-Whitney U-test and the Wilcoxon signed-rank test.

Results: Significant differences were found between apical and coronal levels for both systems (p < 0.05) in canal transportation. In comparing the systems, similar values were found at each level, without significant difference (p > 0.05) in terms of canal curvature and volume. Voxel sizes did not affect the measurements on canal volume, curvature or transportation; no significant difference was found between the 0.100- and 0.125-mm(3) voxel sizes (p > 0.05).

Conclusions: Both instrumentation systems produced similar canal transportation and volume changes. The two voxel resolutions also showed similar results, however a 0.125-mm(3) voxel size can be recommend for a flat panel CBCT scanner with lower exposure dose.

No MeSH data available.


Related in: MedlinePlus