J Korean Acad Conserv Dent.  2002 Jul;27(4):411-420. 10.5395/JKACD.2002.27.4.411.

A comparison of thermoplasticized injectable gutta-percha techniques in ribbon-shaped canals : adaptation to canal walls

• Hwang HS
• Cho KM
• Kim JW

• KMID: 1987297
• DOI: http://doi.org/10.5395/JKACD.2002.27.4.411

Abstract

The aim of this study is to compare the adaptability of thermoplasticized injectable gutta-percha technique to the canal walls in ribbon-shaped canals. Thirty resin models simulated ribbon-shape canals were instrumented to #40 using .06 taper Profile systems. Three groups of each 10 resin models were obturated by the lateral condensation technique(LC) and the two thermoplasticized injectable gutta-percha technique; Ultrafil Endoset+Obtura II(EO) and Ultrafil Firmset(UF), respectively. After resin model were kept at room temperature for 4 days, they were resected horizontally with microtome at 1, 2, 3, 4 and 5mm levels from apex. At each levels, image of resected surface were taken using CCD camera under a stereomicroscope at x40 magnification and stored. Ratio of the area of gutta-percha was obtained by calculating area of gutta-percha cone to the total area of canal using digitized image-analyzing program. The data were collected then analyzed statistically using One-way ANOVA. The results were as follows. 1. At 1mm levels, there was no statistically significant difference in the mean ratio of gutta-percha among the groups. 2. At 2mm level, EO showed the highest mean ratio of gutta-percha (p<0.05) and there was no significant difference between LC and UF. 3. At 3, 4, 5mm levels, EO and UF had significantly greater mean ratio of gutta-percha than LC(p<0.05) and there was no significant difference between EO and UF. In conclusion, the thermoplasticized injectable gutta-percha techniques demonstrated relatively favorable adaptability to canal walls than lateral condensation technique in ribbon-shaped canals except for 1mm level.

Keyword

Ribbon-shaped canal; Thermoplasticized injectable gutta-percha technique; Adaptability

MeSH Terms

Gutta-Percha
Gutta-Percha

Figure

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  Fig. 1 Mean ratio of area of gutta-percha in each group.

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  Fig. 2 Mean ratio of area of gutta-percha for each level.

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  Fig. 3 Representative photograph of Ultrafil Endoset+Obtura II group at the 1mm level showing the incomplete obturation of isthmus.(orginal magnification ×40)

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  Fig. 4 Representative photograph of Ultrafil Firmset group at the 1mm level showing the incomplete obturation of isthmus.(orginal magnification ×40)

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  Fig. 5 Representative photograph of Lateral condensation group at the 1mm level showing the incomplete obturation of isthmus.(orginal magnification ×40)

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  Fig. 6 Representative photograph of Ultrafil Endoset+Obtura II group at the 2mm level showing the complete obturation of isthmus.(orginal magnification ×40)

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  Fig. 7 Representative photograph of Ultrafil Firmset group at the 2mm level showing the complete obturation of isthmus.(orginal magnification ×40)

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  Fig. 8 Representative photograph of Lateral condensation group at the 2mm level showing the complete obturation of isthmus.(orginal magnification ×40)

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  Fig. 9 Representative photograph of Ultrafil Endoset+Obtura II group at the 3mm level showing the good adaptability to the canal wall.(orginal magnification ×40)

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  Fig. 10 Representative photograph of Ultrafil Firmset group at the 3mm level showing the good adaptability to the canal wall.(orginal magnification ×40)

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  Fig. 11 Representative photograph of Lateral condensation group at the 3mm level showing the gaps between gutta-perchas.(orginal magnification ×40)

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  Fig. 12 Representative photograph of Ultrafil Endoset+Obtura II group at the 4mm level showing the good adaptability to the canal wall.(orginal magnification ×40)

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  Fig. 13 Representative photograph of Ultrafil Firmset group at the 4mm level showing the good adaptability to the canal wall.(orginal magnification ×40)

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  Fig. 14 Representative photograph of Lateral condensation group at the 4mm level showing the gaps between gutta-perchas and canal wall.(orginal magnification ×40)

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  Fig. 15 Representative photograph of Ultrafil Endoset+Obtura II group at the 5mm level showing the good adaptability to the canal wall.(orginal magnification ×40)

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  Fig. 16 Representative photograph of Ultrafil Firmset group at the 5mm level showing the good adaptability to the canal wall.(orginal magnification ×40)

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  Fig. 17 Representative photograph of Lateral condensation group at the 5mm level showing the gaps between gutta-perchas and canal wall.(orginal magnification ×40)

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