Sealing properties of endodontic filling materials using radioactive polar and nonpolar isotopes

Kapsimalis, Peter; Evans, Richard

doi:10.1016/0030-4220(66)90313-6

Cited by 80 publications

(17 citation statements)

References 5 publications

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“…Root canals obturated only with sealer are apt to leak because of shrinkage, erosion, and dissolution of the material (Wilson & Batchelor 1970, W'iener & Schilder 1971, Orstavik 1983, Peters 1986. Within a short time after placement, most root fillings become permeable to small molecules (Kapsimalis & Evans 1966, Kerekes & Rowe 1982, Johnson & Zakariasen 1983, Osins ct al. 1983, Kennedy et al 1986.…”

Section: Introductionmentioning

confidence: 99%

Particles and molecules in endodontic leakage

1989

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It is assumed that above a critical level, microleakage causes periapical disease and jeopardizes periapical tissue repair. The purpose of this investigation was first to find out to what degree obturation prevents leakage of bacteria-sized particles or large protein molecules, and second if leakage of the commonly used dye methylene blue is comparable with that of a small bacterial metabolic product of similar molecular size. Sections, 9 mm long, obtained from 46 extracted human incisor roots had their root canals prepared in a standardized manner and obturated in four experimental ways using gutta-percha. The root sections were mounted in the middle of tubes that were closed at both ends with rubber membrane stoppers, which permitted sampling from the apical reservoir. The coronal reservoir was filled with a solution of 1 mg/ml latex beads, 4 micrograms/ml endotoxin, 0.5 per cent butyric acid, 0.1 per cent valeric acid and 0.1 per cent methylene blue water. After 1 and 2 weeks, samples were taken from the apical reservoir and tested for the presence of latex beads by phase-contrast microscopy, for endotoxin with a limulus lysate test, for butyric acid with gas-chromatography and for methylene blue with spectrophotometric analysis. Leakage of bacteria-sized particles and large-sized protein molecules could be prevented only when both sealer and pressure were used in obturating root canals with gutta-percha. Leakage of butyric acid proved to be comparable with leakage of methylene blue; microleakage of these small molecules could not be prevented in this study whatever method of filling was used.

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Section: Introductionmentioning

confidence: 99%

Particles and molecules in endodontic leakage

1989

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“…Up until now, methods for evaluating the ahility of root canal cements to effect a seal in the canal have been limited to dye penetration (Curson & Kirk 1968, 0rstavik et al 1983, Tagger et at. 1983 or radioisotope leakage studies (Kapsimalis & Evans 1966, Higginbotham 1967, Chaisrisookumporn & Rabinowitz 1982. Bacterial microleakage techniques (Kos et al 1982) and human serum leakage techniques (Director & Rabinowitz 1982) have also been developed.…”

Section: Introductionmentioning

confidence: 99%

An assessment in vitro of the sealing properties of Calciobiotic Root Canal Sealer

Cohen¹,

Gutmann²,

Wagner

1985

Int Endodontic J

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“…[12,13] It is, therefore, necessary to study the efficacy of various sealing cements being introduced everyday with claims of ideal sealing abilities.…”

Section: Discussionmentioning

confidence: 99%

Apical sealing ability of two novel root canal sealers: An ex-vivo study

Setia

Sikri

Sroa

et al. 2013

J Int Clin Dent Res Organ

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Objective:The objective was to compare the sealing ability of two root canal sealers viz.: Hybrid Root SEAL (Sun Medical, Tokyo, Japan) and iRoot SP (Innovative BioCeramix Inc., Vancouver, Canada). Materials and Methods: A sample of 60 permanent single rooted, human maxillary central incisors of similar sizes was selected for the study. The teeth were decoronated and randomly divided into two groups viz.: Group A and Group B, comprising of thirty teeth each. In Group A, Hybrid Root SEAL and Group B, iRoot SP were used as root canal sealers along with Gutta-percha cones using lateral condensation technique to obturate the canals. After obturation roots were covered with nail paint except 2.0 mm of root and stored in 0.5% methylene blue dye for 1 week. The teeth were immersed in 10 ml of 65% nitric acid for complete dissolution and subsequently subjected to UV spectrophotometer to quantify the concentration of the dye in each sample. The data were analyzed using the unpaired t-test. Results: The mean dye leakage value in Group B (0.368) was less as compared to Group A (0.408). However, statistically the difference was nonsignifi cant (P = 0.053). Conclusion: There was no statistically signifi cant difference among the two groups.

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Sealing properties of endodontic filling materials using radioactive polar and nonpolar isotopes

Cited by 80 publications

References 5 publications

Particles and molecules in endodontic leakage

Particles and molecules in endodontic leakage

An assessment in vitro of the sealing properties of Calciobiotic Root Canal Sealer

Apical sealing ability of two novel root canal sealers: An ex-vivo study

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