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Effect of filling technique and root canal area on the percentage of gutta-percha in laterally compacted root fillings.

Abstract：

AIM:To determine the influence of filling technique and root canal area on the percentage of gutta-percha (PGP) in laterally compacted root fillings. METHODOLOGY:Sixty extracted canine teeth were accessed and the root canals instrumented to the same size. They were then divided in three groups and filled with laterally compacted gutta-percha cones and AH Plus using different techniques. A variation of cold lateral compaction using a sequence of spreaders prior to accessory cone placement was compared to two commonly-used techniques. Twenty additional canines with prepared root canals were used as negative controls in which gutta-percha was introduced into the canals but no compaction applied. The roots were sectioned horizontally at 3 and 6 mm from the apex and micro-photographs taken. Using software, the area of the canals and gutta-percha at each level were measured and PGP calculated. A Multivariate analysis was used to determine the variables influencing PGP. A linear regression test was used to verify the variation in PGP explained by canal area. RESULTS:At each level the largest canal was two to three times wider than the smallest. Canal area significantly influenced the PGP at both levels (P < 0.05), however, the variation in PGP was only partially explained by canal area (r(2) = 0.154, 6 mm; r(2) = 0.119, 3 mm). The PGP at the 3 mm level was lower than at 6 mm (P = 0.003). The spreader-sequence technique achieved a higher PGP than the other two techniques (P = 0.00002). The control group had the lowest area of GP. CONCLUSIONS:Variations in root canal filling technique and canal area influenced the percentage of gutta-percha of laterally compacted root fillings. The percentage of gutta-percha was lower at the 3 mm level compared to the 6 mm level.

journal_name

Int Endod J

journal_title

International endodontic journal

authors

Souza EM,Wu MK,van der Sluis LW,Leonardo RT,Bonetti-Filho I,Wesselink PR

doi

10.1111/j.1365-2591.2009.01575.x

subject

Has Abstract

pub_date

2009-08-01 00:00:00

pages

719-26

issue

eissn

0143-2885

issn

1365-2591

pii

IEJ1575

journal_volume

pub_type

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Effect of filling technique and root canal area on the percentage of gutta-percha in laterally compacted root fillings.