An <i>in‐vitro</i> evaluation of the influence of temperature of plasticization on the sealing ability of Thermafil

Leung, S F; Gulabivala, K

doi:10.1111/j.1365-2591.1994.tb00227.x

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…At the apical end as well, the mean leakage associated with Densfil obturation was found to be comparable to that associated with lateral condensation. These results also agree with some previous studies (8,19,22,(26)(27)(28) but not with others (9,10,29,30). Thus, inconsistency in the results prohibits the drawing of meaningful conclusions regarding the performance of the solid core thermoplasticized gutta-percha technique.…”

Section: Discussionsupporting

confidence: 83%

Sealing capacity in vitro of thermoplasticized gutta‐percha with a solid core endodontic filling technique

Valli

Rafeek

Walker

1998

Dental Traumatology

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8 Munksgaard, 1998. Abstract -This study assessed the sealing capacity of two endodontic gutta-percha filling techniques. Thirty-four single-rooted fully developed teeth were endodontically accessed, instrumented and randomly divided into two experimental groups (n=12) and two control groups (~5 ) .In Group A, root canals were obturated using a solid core thermoplastic technique (Densfil), in Group B and Group C (negative control) canals were obturated with laterally condensed gutta-percha, and in Group D (positive control) canals were left unobturated. AH-26 was used as the sealer. Two days later, the teeth were conventionally prepared for testing apical and coronal leakage, immersed in india ink for 5 days and subsequently cleared. The linear coronal and apical extent of dye penetration was measured under a light dissecting microscope. The mean apical leakage for Group A was 1.39 mm, and for Group B 2.76 mm, whereas the mean coronal leakage for Group A was 2.87 mm, and for Group B 4.03 mm. The differences between the groups were not statistically sigdicant (P'0.05).It has been established that endodontic treatment success depends on the root canal being well sealed by the endodontic filling, both apically (1) and coronally (2-6). Currently, there are several endodontic filling techniques available. The most accepted, and the standard with which all other techniques are compared, is lateral condensation of gutta-percha (7). One endodontic filling technique that has gained popularity is the application of thermoplasticized gutta-percha by means of a solid carrier. The sealing capacity of this filling technique has been investigated, however, with conAicting results (8-1 3). The majority of studies have assessed the sealing ability of this technique by testing apical leakage (1 1-13), but the seal at both the coronal and the apical levels has not been investigated.The aim of this in vitro study was to assess the coronal and apical seal provided by thermoplasticized

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Section: Discussionsupporting

confidence: 83%

Sealing capacity in vitro of thermoplasticized gutta‐percha with a solid core endodontic filling technique

Valli

Rafeek

Walker

1998

Dental Traumatology

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Dental materials: 1994 literature review

Lloyd

Scrimgeour

Brown

et al. 1996

Journal of Dentistry

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An in vitro comparison of thermoplasticised gutta‐percha obturation techniques with cold lateral condensation

Gulabivala¹,

Holt

Long³

1998

Dental Traumatology

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This study compared the apical sealing ability, obturation time and extrusion of gutta-percha and sealer when root canals were obturated using either cold lateral condensation or one of the three methods using thermoplasticised gutta-percha (Alpha Seal, Thermafil or JS Quick Fill) in vitro. One hundred and thirty-one root canals from 78 extracted human teeth were used; 116 canals were divided into five groups so that they were balanced with respect to prepared canal anatomy, and the remaining 15 canals were used as positive and negative controls. The canals in the first four groups were prepared with hand files using the step-down technique to a standard apical size and flare. The last group was prepared using engine-driven rotary nickel-titanium files (McSpadden) to a similar apical size and flare. One of the four obturating techniques was used to fill the canals in each of the first four groups. The fifth group was obturated using the Alpha Seal technique. The roots were immersed in india ink, demineralised and rendered transparent to assess the extent of maximum lincar dye penetration. The Alpha Seal groups had the highest number of specimens without any leakage. There was a significant difference in the proportions of specimens that did not leak when the Alpha Seal (P < 0.01) and cold lateral condensation groups (P < 0.05) were compared with JS Quick Fill. Cold lateral condensation had a higher proportion of specimens with leakage in canals with curvature greater than 20 degrees than in canals with curvatures less than 20 degrees (P < 0.05). The curvature of canals had no effect on the sealing ability of the other techniques. The method of canal preparation had no effect on the sealing ability of Alpha Seal. Alpha Seal, Thermafil and JS Quick Fill were significantly quicker to perform than cold lateral condensation.

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An in‐vitro evaluation of the influence of temperature of plasticization on the sealing ability of Thermafil

Cited by 4 publications

References 26 publications

Sealing capacity in vitro of thermoplasticized gutta‐percha with a solid core endodontic filling technique

Sealing capacity in vitro of thermoplasticized gutta‐percha with a solid core endodontic filling technique

Dental materials: 1994 literature review

An in vitro comparison of thermoplasticised gutta‐percha obturation techniques with cold lateral condensation

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