Study of titanium screws as retrograde fillings using bacteria and dye

Luomanen, Marita; Tuompo, Helena

doi:10.1111/j.1600-0722.1985.tb01354.x

Cited by 9 publications

(9 citation statements)

References 11 publications

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“…In contrast, none of the negative controls permitted leakage of bacteria. leakage of radio-isotopes and dyes may be more closely related to small molecular percolation and capillary action than leakage of microorganisms and large molecular toxins (26). However, leakage tests involving microbiology are more technically exacting.…”

Section: Bacterial Leakage Testmentioning

confidence: 99%

Sealing ability of potential retrograde root filling materials

Chong

Ford

Watson

et al. 1995

Dental Traumatology

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The sealing ability of two potential retrograde root filling materials, a light-cured glass ionomer cement (Vitrebond) and a reinforced zinc oxide-eugenol cement (Kalzinol) was compared with that of amalgam using three methods of assessment: bacterial leakage, confocal microscopy and Indian ink leakage. the root canals of 80 extracted human single-rooted teeth were prepared. All the teeth were apicected, retrograde cavities were prepared and then divided into four equal groups of 20 teeth. The teeth were sterilised by autoclaving and the retrograde cavities filled with the test materials. In the control group, retrograde cavities in 10 teeth were left unfilled while cavities in another 10 teeth were sealed with cyanoacrylate cement. The teeth were first subjected to a bacterial leakage test using Enterococcus faecalis as a leakage marker. After which, the adaptation of the retrograde root fillings was assessed using a confocal optical microscope. Finally, the teeth were processed for the Indian ink leakage test. Bacterial leakage occurred in more teeth filled with amalgam compared with both Vitrebond and Kalzinol (P<0.001), between which there were no differences. With confocal microscopy, the size of the marginal gap was largest with amalgam and smallest with Vitrebond; all differences were statistically significant (<0.001). Finally, there was more Indian ink penetration with amalgam compared with both Vitrebond and Kalzinol (P<0.001) but there were no differences between Vitrebond and Kalzinol. Although there were individual differences within samples, overall, the three methods of assessment produced similar results. The sealing ability of Vitrebond and Kalzinol was similar and both materials were better than amalgam.

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Section: Bacterial Leakage Testmentioning

confidence: 99%

Sealing ability of potential retrograde root filling materials

Chong

Ford

Watson

et al. 1995

Dental Traumatology

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“…Comparing the sealing ability of retrograde filling materials by testing leakage has been a common evaluation method, utilizing such tracers as dyes (22, 24, 28, 30-32, 35, 39, 44, 45, 56, 57, 60-65, 69-72), radionucfides (23,36,46,47), pressurized liquid (73), electrolytes (25,74), and bacteria (54,57). The results ofthe studies utilizing those various leakage techniques are not comparable (74,75).…”

Section: Sealabilitymentioning

confidence: 99%

“…Some reports indicate that other materials may have to be considered as retrograde filling materials in the future. These materials are the innert and non-corrosive titanium screws (57), and biomaterials which may be fused to dentin by laser, such as enamel and dentin chips (58) or syntered hydroxyapatite (59).…”

mentioning

confidence: 99%

Retrograde approaches in endodontic therapy

Friedman

1991

Dental Traumatology

117

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The routine use of retrograde fillings during apical surgery, as well as the material of choice for that purpose, have been debated. A retrograde filling is placed so as to seal an infected root canal causing periapical pathosis. Therefore, retrograde root canal fillings should be performed routinely during apical surgery regardless of the apparent technical quality of the root canal obturation, unless orthograde endodontic treatment is performed in conjunction with surgery. When orthograde treatment is not performed, retrograde root canal filling enhances the prognosis of apical surgery. An array of potential retrograde filling materials have been extensively investigated in vitro and in vivo. Once that the biocompatibility of the materials is confirmed a clinical comparison, rather than in vitro sealability studies, is the most valid evaluation method. Some of the difficulties encountered in long term clinical studies in patients may be avoided in animal studies. The review of the relevant literature of the past decade suggests that amalgam used in conjunction with cavity varnish is the retrograde filling material of choice. It must be stressed, however, that retrograde filling is not comparable to debridement and obturation of the entire root canal. Therefore, when the only way to approach the root canal is from the apical direction, rather than placing an apical retrograde filling, a retrograde endodontic treatment of the entire canal should be preferred, if it is feasible.

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“…Sealing ability has been assessed in vttro by a number of means. These include the use of dyes (Pitt Ford 1980, Bramwell & Hicks 1986, radioactive isotopes (Tronstad et al 1983, Szeremeta-Browar et al 1985, bacteria (Luomanen & Tuompo 1985) and scanning electron microscopy (Tanzilli et al 1980 Amalgam has been used as a retrograde filling for some time and still remains the material most commonly employed. Different types of amalgam have been tested (Tronstad et al 1983, Mattison et al 1985 and opinions differ over whether conventional or high copper, zinc-containing or zinc-free amalgams provide the best seal.…”

Section: Introductionmentioning

confidence: 99%

The sealing ability of amalgam used as a retrograde root filling in endodontic surgery

Edmunds

Thirawat

1989

Int Endodontic J

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A dye penetration technique was used to investigate the sealing ability of amalgam retrograde root fillings in vitro. A factorial design was employed to determine the effect of amalgam fillings of 1, 2 and 4 mm in length with and without prior filling of the canals with gutta-percha. The results were compared with a group of teeth filled with laterally condensed gutta-percha alone and another with laterally condensed gutta-percha plus root resection but with no retrograde filling. It was concluded that increasing the length of the amalgam filling did not improve the seal, that prior filling of the canal did not improve the seal, that retrograde root fillings were no worse than laterally condensed gutta-percha alone and that root resection of teeth filled with laterally condensed gutta-percha without retrograde filling was no worse than those filled with laterally condensed gutta-percha without root resection or retrograde root filling.

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Study of titanium screws as retrograde fillings using bacteria and dye

Cited by 9 publications

References 11 publications

Sealing ability of potential retrograde root filling materials

Sealing ability of potential retrograde root filling materials

Retrograde approaches in endodontic therapy

The sealing ability of amalgam used as a retrograde root filling in endodontic surgery

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