Sealing ability of thermoplasticized gutta‐percha in root canal obturation using a sectional vs. a single‐phase technique

Veis, Alexander; Beltes, Panos; Liolios, Evangelos

doi:10.1111/j.1600-9657.1989.tb00343.x

Cited by 3 publications

(6 citation statements)

References 20 publications

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“…In all previous studies the needle tip was placed within the recommended distance from the apical foramen (3-5 mm), whereas in the present study the tip was placed at 3 different levels and only in one group (group A) was the needle tip within the recommended distance. Thus the results from group A in this study can be compared with the results of previous studies, and the 30% of underfilled canals found in group A was in agreement with the 30% of underfilled canals in the study of Mann & McWalter (10) and the 35% in that of Veis et al (20) in straight canals.…”

Section: Discussionsupporting

confidence: 91%

“…The combination of dye penetration and the clear- ing technique has been used before in a few studies (8,20) for the evaluation of seahng properties of endodontic filling materials. In this experimental study the sealing ability of injection-molded thermoplasticized guttapercha was measured by the assessment of linear penetration of India ink in teeth previously cleared.…”

Section: Discussionmentioning

confidence: 99%

“…Although most of the investigators evaluating the injectable thermoplasticized gutta-percha technique mention the possibility of extrusion of the filling material, only few of them refer to the incidence of underextension of gutta-percha (10,15,20). Only Mann & McWalter (10) state that in severely curved canals, where the needle tip has not reached the recommended apical level (less than 5 mm from the apical foramen), the filling tends to be short.…”

Section: Discussionmentioning

confidence: 99%

“…In a recent study, Veis et al (20) found that, with the sectional injection-thermoplasticized technique followed bv vertical condensation, underextension could be avoided. Gutmann & Rakusin (15) emphasize the importance of the preparation of the transitional area from the apical to the middle third of the root canal to allow the movement of the thermoplasticized gutta-percha to the full length of the canal.…”

Section: Discussionmentioning

confidence: 99%

“…In this experimental study the sealing ability of injection-molded thermoplasticized guttapercha was measured by the assessment of linear penetration of India ink in teeth previously cleared. The combination of dye penetration and the clear- ing technique has been used before in a few studies (8,20) for the evaluation of seahng properties of endodontic filling materials. It is a reliable method in which no loss of dental tissues takes place and it enables a full view of the linear penetration and the whole root.…”

Section: Discussionmentioning

confidence: 99%

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Apical placement of needle tip with an injection‐thermoplasticized gutta‐percha technique for root canal obturation

Lambrianidis¹,

Veis²,

Zervas³

et al. 1990

Dental Traumatology

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It is recommended that when injection-thermoplasticized gutta-percha is used as the obturation technique, the root canal space should be prepared in such a way that the 23-gauge injection needle tip can be placed at a distance 3 to 5 mm short of the working length. In this study the apical seal and extent of gutta-percha were evaluated when the 23-gauge tip was placed at a distance 4 mm, 6 mm, and 8 mm short of the working length. Ninety-nine human single-rooted mandibular incisors and premolars divided into 3 equal groups were used. Their crowns were separated at the cementoenamel junction and their roots were stored in sodium hypochlorite for 1 week. The roots were then instrumented from size 20 at the working length to size 70:4 mm short of the working length in group A, 6 mm in group B, and 8 mm in group C. Following instrumentation, 3 randomly selected roots of each group were used as control. The remaining 30 roots of each group were covered with aluminium foil and embedded in acrylic blocks. The root canals were then dried, coated with sealer (Roth 811) and obturated by injection of thermoplasticized gutta-percha using the single-phase technique. Vertical condensation followed. The roots were immersed in dye for 3 days and then demineralized, dehydrated and cleared in xylene. Measurements of linear dye penetration for the apical seal and for underextension were done by 2 independent examiners under a stereomicroscope. The results of this study showed no statistically significant difference in leakage between the groups.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Apical placement of needle tip with an injection‐thermoplasticized gutta‐percha technique for root canal obturation

Lambrianidis¹,

Veis²,

Zervas³

et al. 1990

Dental Traumatology

Self Cite

View full text Add to dashboard Cite

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In vitro evaluation of apical leakage of root canal fillings after in situ obturation with thermoplasticized and laterally condensed gutta‐percha

Veis¹,

Molyvdas²,

Lambrianidis³

et al. 1994

Int Endodontic J

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The purpose of this investigation was to compare in vitro the sealing ability of root canal treatments performed in situ with injected thermoplasticized gutta-percha compared with the lateral condensation technique. Thirty single-rooted teeth with straight canals, due for extraction for orthodontic or periodontal reasons were prepared using a step-back technique. Teeth were then divided randomly into groups A and B and obturated, respectively, with the sectional injection thermoplasticized gutta-percha and the lateral condensation techniques. Teeth were extracted after 15 days, immersed in India ink for 3 days and the leakage was determined using area-metric analysis. The roots were ground transversally and the root portion was incrementaly removed with successive steps of 250 microns each, up to the coronal level of the dye penetration. Every section was photographed with a stereoscopic microscope under the same magnification (x20); 310 photographs were taken. Measurements of the area covered by ink as well as the whole cross-sectional area of the canal were made from each photograph with the aid of a digitizing computer. The measurements were subjected to non-parametric statistical analysis. No significant difference was found (P > 0.05). The technique of lateral condensation proved to be better in the first five sections (1.2 mm from the foramen) while thermoplasticized gutta-percha technique was superior in the rest of the root canal.

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Sealing ability of sectional injection thermoplasticized gutta‐percha technique with varying distance between needle tip and apical foramen

Veis¹,

Lambrianidis²,

Molyvdas³

et al. 1992

Dental Traumatology

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The purpose of this investigation was to evaluate the influence of the distance of the needle tip from the apical foramen on the apical seal and the length control of the root filling material when thermoplasticized gutta-percha is injected using a sectional injection technique. Ninety-nine human single-rooted mandibular incisors and permanent premolars with straight canals were divided into three equal Groups A, B and C. In Group A the teeth had relatively the wider root canal, in Group C the narrowest, while in Group B root canal size was intermediate. The root canals of all teeth were prepared with a step-back technique. Roots of Group A were instrumented to a Size 70 4 mm short of the working length, while roots of Groups B and C to a Size 70 6 mm and 8 mm short of the working length, respectively. The teeth of all groups were covered with aluminium foil and embedded in acrylic blocks. After the placement of sealer (Roth 811) the root canals of all teeth were obturated with injection-molded thermoplasticized gutta-percha using a three-stage sectional technique. The roots remained in India ink for three days and then cleared by successive immersion in nitric acid, ascending grades of alcohol and finally in xylene. The linear dye penetration and the linear apical underextentionion of the root canal filling were measured by two independent examiners under a stereo microscope. There was no significant difference in the linear dye leakage between the groups.(ABSTRACT TRUNCATED AT 250 WORDS)

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Sealing ability of thermoplasticized gutta‐percha in root canal obturation using a sectional vs. a single‐phase technique

Cited by 3 publications

References 20 publications

Apical placement of needle tip with an injection‐thermoplasticized gutta‐percha technique for root canal obturation

Apical placement of needle tip with an injection‐thermoplasticized gutta‐percha technique for root canal obturation

In vitro evaluation of apical leakage of root canal fillings after in situ obturation with thermoplasticized and laterally condensed gutta‐percha

Sealing ability of sectional injection thermoplasticized gutta‐percha technique with varying distance between needle tip and apical foramen

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