Evaluation of conventional and digital radiography capacities for distinguishing dental materials on radiograms depending on the present radiopacifying agent

Antonijevic, Djordje; Ilic, Dragan; Medic, Vesna; Dodić, Slobodan; Obradović-Djuričić, Kosovka; Rakocevic, Zoran

doi:10.2298/vsp1411006a

Cited by 15 publications

(29 citation statements)

References 25 publications

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“…The discrepancies in radiopacity among the tested composite materials are mainly attributed to differences in filler composition, and more specifically in concentration and type of included radiopacifying agents . As it mentioned previously, the radiopacifying agents of the dental composite restoratives are inorganic compounds with high atomic numbers, which are incorporated as fillers.…”

Section: Discussionmentioning

confidence: 94%

Effect of filler composition of dental composite restorative materials on radiopacity in digital radiographic images

et al. 2017

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The purpose of this study was to evaluate the effect of filler composition on the radiopacity of 16 dental composite restorative materials using digital radiography. Five disc‐shaped specimens of each composite material were prepared using Teflon molds and five enamel and dentin specimens were prepared from human teeth. The composite specimens were placed on a digital sensor together with a tooth fragment and an aluminum stepwedge and a digital dental X‐ray unit was used at the same exposure conditions. The mean gray values of each composite specimen, tooth fragment, and stepwedge were measured on the digital images using a software program. Statistical analysis of the data was implemented with one‐way ANOVA and post hoc Tukey's HSD test (a = 0.05). The composites presented higher radiopacity than dental tissues (p < 0.05), except Filtek Silorane which exhibited lower radiopacity than enamel (p < 0.05). Linear regressions revealed a very low correlation between radiopacity and filler content of the composites. The composite restoratives presented great variations in radiopacity. Concentration and type of the radiopacifying agents included in the composites crucially affected radiopacity. The choice of the composite restorative materials is of great importance due to large variations in their radiopacity, which depends on their filler composition. POLYM. COMPOS., 39:E351–E357, 2018. © 2017 Society of Plastics Engineers

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Section: Discussionmentioning

confidence: 94%

Effect of filler composition of dental composite restorative materials on radiopacity in digital radiographic images

et al. 2017

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“…Mineral trioxide aggregate is expensive, and accordingly, Portland cement is currently being considered as an alternative root-filling material which could be mixed with a suitable radiopacifier by the clinician [4,[5][6][7]. In this respect, the findings of this study indicate that barium sulphate and zirconium oxide are superior to bismuth oxide with respect to setting time.…”

Section: In Vitro Bioactivitymentioning

confidence: 91%

“…Recent studies have indicated that a number of candidate radiopacifiers, including barium sulphate and zirconium oxide, may possess superior physicochemical, mechanical or biological properties to those of bismuth oxide [3][4][5][6][7][8]. Mineral trioxide aggregate is expensive, and accordingly, Portland cement is currently being considered as an alternative root-filling material which could be mixed with a suitable radiopacifier by the clinician [4,[5][6][7].…”

Section: In Vitro Bioactivitymentioning

confidence: 99%

“…Barium sulphate (BaSO 4 ) and zirconium oxide (ZrO 2 ) are among a range of alternative radiopacifying agents with potentially superior chemical, mechanical and biological properties that are currently under investigation for use in hydraulic calcium silicate cements for dental restorations [4][5][6][7]. Both barium sulphate and zirconium oxide, by virtue of their low solubilities, are currently used as radiographic contrast agents in a number of biomaterials [5,8].…”

Section: Introductionmentioning

confidence: 99%

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In Vitro Bioactivity and Setting Times of White Portland Cement Combined with Different Radio Pacifying Agents

et al. 2017

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Abstract.Commercial formulations based on 80:20 mixtures of Portland cement and bismuth oxide (a radiopacifying agent) are used in dentistry as root-filling materials. This study compares the impact of two alternative radiopacifiers, barium sulphate and zirconium oxide, with that of bismuth oxide, on the setting times and bioactivity of white Portland cement. The findings indicate that bismuth oxide prolongs both the initial and final setting times of the cement, and that barium sulphate and zirconium oxide have no effect on this parameter. Hydroxyapatite (HA) formed on the surfaces of all test samples within 7 days of exposure to simulated body fluid, indicating that they possess the potential to stimulate new hard tissue formation. Fourier transform infrared spectroscopy, the traditional technique for the identification of HA, was not appropriate for the analysis of these cement systems owing to the overlap of signals from each of the radiopacifiers with the characteristic P-O bending modes of HA in the 570 -610 cm -1 region. In this respect, the P-O band at 965 cm -1 of HA in the Raman spectrum was found to be a suitable means of detection since it is discrete with respect to all signals arising from the radiopacifying agents and cement phases.

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“…Micromechanical properties were not affected by using different liquid components [64]. When adding different radiopacifiers to CS cements, engineers should be careful having in mind that some radiopaque agents (BaSO4 and CHI3) result in different radiopacities of the final mixture on dental film and digital sensor [65]. The variations in the radiopacity of tested cements on film and CCD-based digital sensor arise from the different sensitivity of the detector used.…”

Section: Physico-chemical Properties Of Cs Cementsmentioning

confidence: 99%

Physico-chemical and biological properties of dental calcium silicate cements - literature review

Ilic

Antonijević

Biočanin

et al. 2019

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Dental cement materials have been developed with the aim to replace hard dental tissues. The first material used for pulp capping, root canal obturation, bifurcation perforation and apexification is calcium hydroxide (in 1920). A half century later, glass-ionomer cements began to suppress it as dentine substitutes. Finally, in the 1990s, calcium silicate (CS) material appeared in the dental research community as the most promising dentine substitute capable to adequately meet all clinical requirements. The aim of this paper is to present an overview of literature related to studies about CS materials taking into account their physical, chemical and biological properties and clinical applications. This review aims to discuss beneficial and adverse characteristics of CSs concerning interactions to the hard dentine and soft pulp/periodontal tissues. This review article deals with the literature data about currently commercially available CS concerning laboratory and clinical findings. 109 scientific articles were analyzed of which 62 references reported in vitro and 26 in vivo investigations while 21 references comprised reports, reviews and books dealing with both, in vitro and in vivo investigations. Although further data collection is necessary, CSs are promising materials that represent a gold standard for numerous dental clinical procedures.

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Evaluation of conventional and digital radiography capacities for distinguishing dental materials on radiograms depending on the present radiopacifying agent

Cited by 15 publications

References 25 publications

Effect of filler composition of dental composite restorative materials on radiopacity in digital radiographic images

Effect of filler composition of dental composite restorative materials on radiopacity in digital radiographic images

In Vitro Bioactivity and Setting Times of White Portland Cement Combined with Different Radio Pacifying Agents

Physico-chemical and biological properties of dental calcium silicate cements - literature review

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