CLINICAL ARTICLESComparison of a Warm Gutta-Percha Obturation Technique and Lateral Condensation
Section snippets
MATERIALS AND METHODS
Tooth blocks were constructed as described by Budd et al. (13) with some modifications. An extracted permanent maxillary central incisor was mounted in clear casting resin (ETI, Fields Landing, CA). Four alignment holes were drilled into the block perpendicular to the long axis of the tooth. After removal of the crown the block and root were sectioned longitudinally in a mesiodistal plane through the center of the root canal, utilizing a Buehler Isomet low-speed saw (Buehler Ltd., Evanston,
RESULTS
A statistically significant difference (p < 0.005) was found between both techniques in all categories. Gutta-percha using the Thermafil technique was better able to flow into lateral spaces, had fewer voids, and replicated the surface of the root better. It also, however, resulted in more apical extrusion than did lateral condensation. Numerical data are presented in Table 1.
DISCUSSION
The length of fill was measured as being either long (+) or short (−) in millimeters. The Thermafil group always had gutta-percha extending beyond the apical constriction up to a maximum of 2 mm. There are several possible reasons for this observation. First thermoplasticized techniques have been shown to improve flow properties of the gutta-percha, which result in an increased incidence of sealer and gutta-percha being extruded out of major and accessory canals. The clinical significance of
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2019, Polymer TestingCitation Excerpt :Many factors affect the sealing effect of RCT, such as root canal preparation, instruments, the effect of stain level, the interior structure of root canal and filling methods [3]. But the primary factor is the property of root canal filling material itself, especially the dimensional stability [7], which can lead to the problem of interfacial gaps and voids [8,9] and even result in the failure of treatment caused by microleakages [10,11]. Some studies focuses on evaluating the microbial leakage caused by volume shrinkage in roots filled with GP points [12–14], which shows that gaps emerged and then created a series of channels for microleakage of bacteria, resulting in the rapid rate of leakage in the GP samples.
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2016, Journal of EndodonticsCitation Excerpt :The higher pain levels associated with the TF obturation technique can be explained by the extrusion of root canal filling material, something that occurs frequently with this technique (14). One of the disadvantages of the TF technique compared with CLC is the higher risk of extruding sealer and/or gutta-percha from the apical foramen as shown in some in vitro studies (31, 32). Although Da Silva et al (32) reported 25%–100% of extruded root canal filling with the TF technique, Abarca et al (33) found no difference in the amount of sealer extruded with the TF and LC techniques.
Dr. Himel has received honoraria from Tulsa/Dentsply for lecturing.