TY - JOUR
T1 - A comparison of sealer placement techniques in curved canals
AU - Hall, Michael C.
AU - Clement, David J.
AU - Dove, S. Brent
AU - Walker, William A.
N1 - Funding Information:
Teeth were decalcified in 5% nitric acid, dehydrated in graded ethyl alcohol rinses, and cleared in methyl salicylate according to the technique proposed by Robertson et al. (10). Both proximal surfaces of each tooth were examined under stereomicroscope (Zeiss, Germany) at a power of × 1.2. The apical 10 mm of each proximal view was photographed in color. This produced a total of 90 images. The gutta-percha appeared as a uniform pink color, and sealer appeared gray-black. Buccal and lingual views of the cleared specimens were not photographed. During pilot studies, these views demonstrated too much distortion to be accurately evaluated. Black and white images produced from the color slides clearly show the difference between sealer and gutta-percha (Fig. 2). All images were coded according to group. Percentage of total sealer coverage for each proximal surface was calculated utilizing Adobe Photoshop Version 3.0 (Adobe Systems, Inc.) digitizing software, and NIH Image Version 1.55 (National Institutes of Health, Bethesda, MD) imaging software on a Macintosh Quadm 800 computer (Apple Computers, Inc., Cupertino, CA). Analysis of variance was used to determine the significance of between-group differences.
PY - 1996
Y1 - 1996
N2 - Sealer placement techniques have not been examined in teeth with curved canals prepared with Lightspeed instruments. Three traditional methods of placing sealer were studied, using 45 extracted human single-rooted teeth, divided into 3 groups of 15. Root canal preparations were made with Light-speed nickel-titanium, engine-driven instruments. AH26 sealer was applied with either K-file, lentulo spiral, or master gutta-percha cone. Radiographs were taken after sealer placement and analyzed for amount of canal sealer fill. The teeth were then obturated with laterally condensed gutta-percha, chemically cleared, photographed, and analyzed for total canal wall sealer coverage. The results showed a statistically significant difference in canal sealer fill among the three groups before obturation, but there was no statistical difference in canal wall coverage among the three groups after obturation. None of the examined methods exceeded an average of 62.5% wall coverage of sealer after obturation. This suggests that complete wall coverage after obturation may not be possible.
AB - Sealer placement techniques have not been examined in teeth with curved canals prepared with Lightspeed instruments. Three traditional methods of placing sealer were studied, using 45 extracted human single-rooted teeth, divided into 3 groups of 15. Root canal preparations were made with Light-speed nickel-titanium, engine-driven instruments. AH26 sealer was applied with either K-file, lentulo spiral, or master gutta-percha cone. Radiographs were taken after sealer placement and analyzed for amount of canal sealer fill. The teeth were then obturated with laterally condensed gutta-percha, chemically cleared, photographed, and analyzed for total canal wall sealer coverage. The results showed a statistically significant difference in canal sealer fill among the three groups before obturation, but there was no statistical difference in canal wall coverage among the three groups after obturation. None of the examined methods exceeded an average of 62.5% wall coverage of sealer after obturation. This suggests that complete wall coverage after obturation may not be possible.
UR - http://www.scopus.com/inward/record.url?scp=0030322937&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030322937&partnerID=8YFLogxK
U2 - 10.1016/S0099-2399(96)80055-0
DO - 10.1016/S0099-2399(96)80055-0
M3 - Article
C2 - 9220746
AN - SCOPUS:0030322937
VL - 22
SP - 638
EP - 642
JO - Journal of Endodontics
JF - Journal of Endodontics
SN - 0099-2399
IS - 12
ER -