scispace - formally typeset
Search or ask a question
Journal ArticleDOI

The percentage of gutta-percha-filled area in simulated curved canals when filled using Endo Twinn, a new heat device source.

01 Aug 2006-International Endodontic Journal (Int Endod J)-Vol. 39, Iss: 8, pp 610-615
TL;DR: To compare the percentage of gutta-percha-filled area (PGP) in simulated root canals when varying the penetration depth and function of the pluggers (heat versus heat plus vibration) using Endo Twinn, data were analysed using ANOVA test.
Abstract: Aim To compare the percentage of gutta-percha-filled area (PGP) in simulated root canals when varying the penetration depth and function of the pluggers (heat versus heat plus vibration) using Endo Twinn. Methodology Sixty-four resin blocks with simulated 34–35° curved canals were randomly divided into two groups in order to obtain two canal shapes: group A with 0.8 taper and group B with 0.4 taper. The apical portion of each canal was prepared to a size 20 K-file. The canals were filled with gutta-percha in combination with a root canal sealer. In each group 16 canals were filled using the Endo Twinn heat function and 16 canals by means of both the heat and the vibration function. All samples were sectioned horizontally at three levels (1.25, 2.5 and 4.0 mm from the working length) and the PGP was measured. Data were analysed using anova test. Results At the 1.25 mm level PGP was significantly greater using the vibration function (P = 0.0329) and in 0.8 taper canals (P < 0.0001). At the 2.5 mm level the PGP was greater in the canals with 0.8 taper compared with a 0.4 taper with or without vibration (vibration, P = 0.0056; interaction taper-vibration, P = 0.0020). In 0.4 taper canals the PGP was greater when the vibration function was activated. At the 4 mm level in 0.8 taper canals there was no significant difference in PGP with or without the vibration (P = 0.6742). Conclusions 0.8 taper canals had significantly greater PGP than 0.4 taper canals. At the 1.25 mm level there was significantly greater PGP when the vibration function was activated.
Citations
More filters
Journal ArticleDOI
TL;DR: Assessment of canal fillings performed by using current methods during re-treatment with rotary instruments found no statistically significant difference among the 4 filling techniques regarding the amount of residual material in the apical, middle, and coronal thirds and inside the whole canal area.

89 citations

Journal ArticleDOI
TL;DR: Lateral compaction of greater taper gutta-percha cones is a fast and efficient method for obturation of curved canals within the limitations of the in vitro study.
Abstract: The aim of this study was to compare different obturation techniques in severely curved canals in terms of the percentage of gutta-percha filled area and voids. The obturation times and the incidence of extrusion of filling material were also compared. Curved root canals (curvature, 25-35°) of 48 extracted human teeth were enlarged with Mtwo rotary NiTi instruments and obturated as follows: Group A: 0.04/35 matched-single-cone; Group B: cold lateral compaction with 0.04/35 gutta-percha master cone; Group C: warm vertical compaction; Group D: lateral compaction with standardized gutta-percha master cone. In all groups AHPlus was used as sealer. The teeth were sectioned horizontally at 2, 3, 4, 6 and 8 mm from the apex. The total area of each canal segment was measured and the areas of gutta-percha, sealer and voids were converted to percentages of the total area. Data were subjected to the Kruskal-Wallis and post hoc Dunn test. Obturation times were compared using ANOVA and post hoc Student-Newman-Keuls test. The matched-single-cone obturation (group A) was significantly the fastest method while warm vertical compaction (group C) required significantly more time than all other techniques (p 0.05). At all levels, groups B, C, and D produced significantly higher gutta-percha filled areas (p 0.05) regarding gutta-percha and sealer-filled areas. Within the limitations of the in vitro study, it can be concluded that lateral compaction of greater taper gutta-percha cones is a fast and efficient method for obturation of curved canals.

63 citations


Cites background from "The percentage of gutta-percha-fill..."

  • ...While most of these studies evaluated obturation of straight canals [3, 13, 14, 18, 20, 23, 25, 26] data regarding the quality of obturation of severely curved canals is limited [21, 22, 27]....

    [...]

Journal ArticleDOI
TL;DR: Findings point to the potential benefit of micro-CT analyses for in vitro evaluation of root canal obturation systems and provide further information about sealer materials used in combination with a warm gutta-percha vertical compaction technique.
Abstract: Objectives The aim of the present study was to analyze the formation of voids and gaps in root canals obturated with different sealer materials in combination with warm gutta-percha vertical compaction technique by using BeeFill® 2in1.

44 citations

Journal ArticleDOI
TL;DR: The percentage of gutta-percha and sealer-filled canal area was similar when canals were filled with different master cones using lateral condensation or single cone techniques.
Abstract: Aim To evaluate the percentage of gutta-percha and sealer-filled canal area when four different types of master gutta-percha cones were used. Methodology Sixty mandibular premolars with straight canals were instrumented using System ProTaper rotary instruments with a crown-down technique and assigned to four groups. Canals were obturated with AH-26 sealer either using lateral condensation and 0.02 taper gutta-percha cones (group A), 0.04 taper gutta-percha cones (group B), nonstandardized F- medium (group C) master gutta-percha cones, or a single System ProTaper gutta-percha cone (group D). The percentage of gutta-percha and sealer-filled area was calculated in horizontal sections of the apical portion of each canal, using image analysis software. The data was statistically analysed using Kruskal–Wallis test. Results The distribution of filling materials amongst groups was not significantly different at each level of sectioning (P > 0.05). Conclusion The percentage of gutta-percha and sealer-filled canal area was similar when canals were filled with different master cones using lateral condensation or single cone techniques.

40 citations


Cites methods from "The percentage of gutta-percha-fill..."

  • ...Area-metric analysis has been applied previously to examine several materials and techniques (Dandakis et al. 2005, Kececi et al. 2005, De-Deus et al. 2006, Pagavino et al. 2006, Gulsahi et al. 2007)....

    [...]

Journal ArticleDOI
TL;DR: Inexperienced students obtained more homogeneous root canal fillings with the vertical compaction method; however, the probability of overextruding filling material with this method was high.
Abstract: Objectives The aim of this study was to determine radiographic and microscopic appearances of root canal fillings performed by undergraduate students using vertical and lateral compaction techniques. Study design Thirty dental students were instructed how to fill curved simulated canals with gutta-percha and sealer using lateral and vertical compaction. Digital radiographs were taken in buccolingual and mesio-distal projections; radiographs were evaluated for homogeneity and root canal wall contact. Plastic blocks with simulated canals were sectioned and cross sections were assessed under a light microscope for voids. Probabilities were expressed as odds ratios (OR) with 95% confidence intervals (CI). Results Radiographs showed that the chances of obtaining a homogeneous root canal filling by using a vertical compaction technique were 3 times higher in the coronal canal third (OR 3.2; CI: 1.9, 5.3), the same in the middle third, and 2 times higher in the apical third (CI: 1.1, 2.4) than when using lateral compaction. Microscopic evaluation of the same canals revealed that the chances of obtaining a homogeneous root canal filling by vertical compaction were 3 times higher in the coronal canal third (CI: 1.6, 5.8), almost 3 times higher in the middle canal third (CI: 1.6, 4.7), and about 10 times higher in the apical canal third (OR 9.8; CI: 2.2, 43.4) than by lateral compaction. The chances of transporting filling material beyond the apex were almost 5 times higher (OR 4.6; CI: 2.8, 7.6) when using vertical rather than lateral compaction. Conclusion Inexperienced students obtained more homogeneous root canal fillings with the vertical compaction method; however, the probability of overextruding filling material with this method was high.

13 citations


Cites methods from "The percentage of gutta-percha-fill..."

  • ...Standardized artificial canals have been used in several earlier investigations to examine the quality of root canal obturation.(4,29) Plastic blocks with simulated canals may be readily cut using a diamond band saw at Table V....

    [...]

References
More filters
Journal ArticleDOI
TL;DR: Long oval canal is common in the apical 5 mm in human teeth and care should be taken in cleaning, shaping, and obturating these oval canals.
Abstract: Objective The aim of this study was to investigate the canal diameters in the apical roots of human teeth to determine prevalence and extent of long oval canals. Study design. This investigation was carried out on 180 extracted human teeth, 20 for each tooth group. Each root was horizontally sectioned at 1, 2, 3, 4, and 5 mm from the apex. Canal diameters were measured with a measuring microscope. Results. In 293 (25%) of the 1181 cross sections investigated, a long oval canal (the long canal diameter was at least 2 times the short canal diameter) was identified. In some tooth groups, the percentage of long oval canals exceeded 50%. In most cases, the long diameter decreased apically; that is, the canal tended toward a rounder cross section. A wide range of diameters existed in all canals. Conclusion. Long oval canal is common in the apical 5 mm in human teeth. Many long and narrow oval canals would be impossible to instrument completely without perforating or significantly weakening the roots. Care should be taken in cleaning, shaping, and obturating these oval canals.

432 citations

Journal ArticleDOI
TL;DR: After storing the specimens in water for 2 years, AH26, Sealapex, Ketac-Endo and PCS-EWT leaked more than before storage in water (P = 0.0008), and it was shown that J&J Bonding Agent allowed less leakage and PC sEWT more leakage than the other four sealers.
Abstract: Summary Long-term sealing ability of root-canal sealer is of clinical importance. We compared the performance of five sealers and a dentine bonding agent, at thicknesses of 0.05 mm (thin layer) and 0.3 mm (thick layer), in 212 standard human root specimens, before and after storage in water for 2 years. Thick layers of Roth and Pulp Canal Sealer EWT (PCS–EWT) allowed more leakage than did thin layers (P = 0.0000, 0.0358 for Roth and PCS–EWT, respectively) whereas no significant difference was found between the thin and thick layers for AH26, Ketac-Endo, Sealapex and J& J Bonding Agent. The pooled results of the thin and thick layers, which have clinical relevance, showed that after storing the specimens in water for 2 years, AH26, Sealapex, Ketac-Endo and PCS–EWT leaked more than before storage in water (P = 0.0008, 0.0000, 0.0035, 0.0257 for AH26, Sealapex, Ketac-Endo and PCS–EWT respectively), and that)&J Bonding Agent allowed less leakage and PCS-EWT more leakage than the other four sealers (P= 0.0000).

156 citations

Journal ArticleDOI
TL;DR: The percentage of gutta-percha-filled canal area using warm GP was greater than that of the cold GP in oval canals, and the quality of root fillings was evaluated by calculating the percentage of stomach- percha- filled canal area (PGP).
Abstract: Wu M-K, Ka u t’akova A, Wesselink PR. Quality of cold and warm gutta-percha fillings in oval canals in mandibular premolars. International Endodontic Journal , 34 , 485‐491, 2001. Aim The aim of this study was to determine the quality of cold and warm gutta-percha fillings in oval canals. Methodology Two groups of mandibular premolars with oval canals were selected after bucco-lingual and mesio-distal radiographs indicated an internal long : short diameter of ♢ 1.6 at a level 5 mm from the apex. After instrumentation they were obturated, respectively, by cold lateral compaction of gutta-percha cones (cold GP) and vertical compaction of warm gutta-percha (warm GP). Leakage along apical root fillings was measured using a fluid transport model. After the leakage test, horizontal sections were cut 2 and 4 mm from the apex. The area of the canal and gutta-percha in cross-sections was measured using an image analysis program. The quality of root fillings was evaluated by calculating the percentage of gutta-percha-filled canal area (PGP). Results No significant difference in leakage was found between the two groups ( P = 0.570). The warm GP group produced significantly higher PGPs than the cold GP group 4 mm from the apex only ( P = 0.522 at 2 mm; P = 0.000 at 4 mm). Conclusions The percentage of gutta-percha-filled canal area using warm GP was greater than that of the cold GP in oval canals.

152 citations

Journal ArticleDOI
TL;DR: Sealer may be removed from the canal wall by the condensation procedures using three different gutta-percha root-filling techniques.
Abstract: Wu M-K, Ozok AR, Wesselink PR. Sealer distribution in root canals obturated by three techniques. International Endodontic Journal , 33 , 340‐345, 2000. Aim The aim of this study was to observe sealer distribution in root canals filled by different root filling techniques. Methodology AH26 (0.05 mL) dyed with carbon black powder was placed into the prepared root canals of maxillary central incisors using a lentulo spiral. Thereafter the canals were obturated using three different gutta-percha root-filling techniques. Horizontal sections were cut in the apical and middle portions of the filled canals. Images of the cross sections were scanned and the percentage of sealer coated canal perimeter (PSCP) was measured using a computer digital imaging system. Results At 3 mm from the apex, the PSCP after lateral condensation was similar to that after vertical condensation ( P > 0.05). At 6 mm from the apex, however, the PSCP was significantly higher after lateral condensation than after vertical condensation ( P < 0.05). At both levels the PSCP was significantly higher after single cone (no condensation) than after the other two condensation techniques ( P < 0.0001). Conclusions Sealer may be removed from the canal wall by the condensation procedures.

124 citations

Journal ArticleDOI
TL;DR: Through use of these techniques in vitro, Thermafil and JS Quick-Fill with carrier and System B were found to be superior to the lateral condensation technique in terms of core/sealer ratio and dye leakage.
Abstract: Objectives. In this in vitro study, the core (gutta-percha or gutta-percha and carrier)/sealer ratio and the sealing ability were calculated for 4 different gutta-percha techniques: Thermafil, JS Quick-Fill, System B, and lateral condensation. Study Design. One hundred single-rooted teeth were instrumented and obturated. Forty of the teeth were embedded in resin and sectioned horizontally at 1, 2,3, and 4 mm from the anatomic apex. Photographs were taken of each section, and the total area of the canal filled with core material or sealer was calculated. Sixty of the teeth were kept in wet storage for 90 days, after which the teeth were immersed in 2% methylene blue for 48 hours. The length of dye penetration was measured. Results. Roots obturated with Thermafil and JS Quick-Fill contained significantly more core material than did those obturated with System B or with lateral condensation. The lateral condensation technique had the lowest core/sealer ratio (P <.05). Roots using Thermafil and Quick-Fill showed significantly less dye leakage than did the lateral condensation technique. Conclusions. Through use of these techniques in vitro, Thermafil and JS Quick-Fill with carrier and System B were found to be superior to the lateral condensation technique in terms of core/sealer ratio. Thermafil and Quick-Fill were superior to lateral condensation in terms of dye leakage. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2002;93:333-6)

114 citations