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Surface modification of gutta-percha cones by non-thermal plasma

, : Surface modification of gutta-percha cones by non-thermal plasma. Materials Science & Engineering. C, Materials for Biological Applications 68: 343-349

This study was designed to evaluate the effects of Oxygen and Argon plasma on gutta-percha surfaces. A total of 185 flat smooth gutta-percha surfaces were used. Samples were divided into groups: control: no plasma treatment; Oxygen: treatment with Oxygen plasma for 1min; Argon: treatment with Argon plasma for 1min. Samples were evaluated topographically by scanning electron microscopy and atomic force microscopy; and chemically by Fourier Transform-infrared Spectroscopy. A goniometer was used to determine the surface free energy and the wettability of the endodontic sealers. Additionally 60 bovine teeth were filled using pellets of gutta-percha (control, oxygen and argon plasma) and the sealers. Teeth were evaluated by push-out and microleakage tests. Data were statistically analyzed using specific tests. Argon plasma did not change the surface topography, while Oxygen plasma led to changes. Both treatments chemically modified the gutta-percha surface. Argon and Oxygen plasma increased the surface free energy and favored the wettability of AH Plus and Pulp Canal Sealer EWT. Regarding bond strength analysis, for AH Plus sealer, both plasma treatments on gutta-percha favored the bond strength to dentin. However, for Pulp Canal Sealer, there is no statistically significant influence. For leakage test, dye penetration occurred between sealer and dentin in all groups. In conclusion, Oxygen plasma led to both topographic and chemical changes in the gutta-percha surface, while Argon plasma caused only chemical changes. Both treatments increased the surface free energy, favoring the wettability of AH Plus and Pulp Canal Sealer EWT sealers and influenced positively in the adhesion and leakage.


PMID: 27524029

DOI: 10.1016/j.msec.2016.05.062

Other references

Fujita S.; Obara T.; Tanaka I.; Yamauchi C., 1981: Distribution of environmental temperature and relative humidity according to the number of conditioned air changes in laboratory animal rooms. The relation of the rate of circulating air change to room temperature and relative humidity in animal quarters with a central air-conditioning system during heating and cooling seasons was investigated. During the period of heating, the ambient t...

Macdonald, J.W.; Cornelius, L.W., 1969: Salmonellosis in wild birds. This paper reviews several outbreaks of Salmonella typhimurium infection in wild birds which have occurred in recent years in the South of England. House sparrows (Passer domesticus) and greenfinches (Carduelis chloris) were the most commonly affe...

Faller, H.; Reusch, A.; Vogel, H.; Ehlebracht-König, I.; Petermann, F., 2005: Patient education. Patient education is considered to be a major feature of medical rehabilitation in chronic disorders. The rehabilitation sciences research programme funded by the German Pension Insurance scheme and the Federal Ministry of Education and Research c...

Kuntz, Joseph Anthony, 1954: The action and recovery from the effects of certain stimulants and depressants on individual fibroblasts in a perfusion chamber. Dissertation Absts 14(9): 1308

Sotero, P.; Arce, R., 2000: Photochemistry of perylene adsorbed on models of atmospheric particulate matter. Abstracts of Papers American Chemical Society 220(Part 1): ENVR 229

Anonymous, 1988: Deep-seated mycoses. Clinical aspects, pathology, laboratory diagnosis and therapy as illustrated in case studies. 20th scientific conference of the German-speaking Mycological Society. Freiburg, 22-24 May 1986. Mycoses Suppl 1: 1-108

Buist, G.; Steen, A.; Kok, J.; Kuipers, O.P., 2008: LysM, a widely distributed protein motif for binding to (peptido)glycans. Bacteria retain certain proteins at their cell envelopes by attaching them in a non-covalent manner to peptidoglycan, using specific protein domains, such as the prominent LysM (Lysin Motif) domain. More than 4000 (Pfam PF01476) proteins of both p...

Donohue, T.M.J. ; Barker, K.L., 1983: Glucose 6 phosphate dehydrogenase ec translational regulation of synthesis and regulation of processing of the enzyme in the uterus by estradiol. Twelve hours after i.v. administration of estradiol to ovariectomized mature rats, and 18-fold increase in the rate of synthesis of glucose-6-phosphate dehydrogenase (D-glucose-6-phosphate: NADP+ oxidoreductase, EC is observed. At that t...

Rubino, F.M.; Pitton, M.;, D.; Meroni, G.; Santaniello, E.; Caneva, E.; Pappini, M.; Colombi, A., 2011: Measurement of S-methylcysteine and S-methyl-mercapturic acid in human urine by alkyl-chloroformate extractive derivatization and isotope-dilution gas chromatography-mass spectrometry. S-methylcysteine (SMC) is a minor amino acid naturally excreted in human urine, a protective agent against oxidative stress and a biotransformation product of the fumigant biocide methyl bromide and of nicotine. A metabolic source of SMC is catabo...

Ghatineh, S.; Timbrell, J.A., 1994: The biochemical effects and toxicity of hydrazine in cultured rat hepatocytes. Cultured rat hepatocytes were exposed to hydrazine for 4 hr, 17 hr or 4 hr followed by a 13-hr post-exposure period. Hydrazine was cytotoxic as measured by leakage of lactate dehydrogenase (LDH), caused depletion of ATP and inhibited protein synth...