Interferometric microscopy study of the surface roughness of Portland cement under the action of different irrigants

Abstract

Objectives: Some investigations suggested common Portland cement (PC) as a substitute material for MTA for endodontic use; both MTA and PC have a similar composition. The aim of this study was to determine the surface roughness of common PC before and after the exposition to different endodontic irrigating solutions: 10% and 20% citric acid, 17% ethylenediaminetetraacetic (EDTA) and 5% sodium hypochlorite. Study Design: Fifty PC samples in the form of cubes were prepared. PC was mixed with distilled water (powder/liquid ratio 3:1 by weight). The samples were immersed for one minute in 10% and 20% citric acid, 17% EDTA and 5% sodium hypochlorite. After gold coating, PC samples were examined using the New View 100 Zygo interferometric microscope. It was used to examine and register the surface roughness and the profile of two different areas of each sample. Analysis of variance (ANOVA) was carried out, and as the requirements were not met, use was made of the Kruskal-Wallis test for analysis of the results obtained, followed by contrasts using Tukey’s contrast tests. Results: Sodium hypochlorite at a concentration of 5% significantly reduced the surface roughness of PC, while 20% citric acid significantly increased surface roughness. The other evaluated citric acid concentration (10%) slightly increased the surface roughness of PC, though statistical significance was not reached. EDTA at a concentration of 17% failed to modify PC surface roughness. Irrigation with 5% sodium hypochlorite and 20% citric acid lowered and raised the roughness values, respectively. Conclusions: The surface texture of PC is modified as the result of treatment with different irrigating solutions commonly used in endodontics, depending on their chemical composition and concentration. Key words:MTA, Portland cement, citric acid, ethylenediaminetetraacetic acid, sodium hypochlorite, surface roughness.

Surface Microhardness and Roughness Properties of Biodentine

“…9,11 A few previous studies tested the effect of irrigating solutions on the microhardness of MTA. 7,11 These studies demonstrated low or decreased microhardness values of MTA following contact with irrigation solutions. To validate endodontic indications of Biodentine, especially in cases of root perforations, we evaluated the effect of immersion in different irrigation solutions on its mechanical properties.…”

“…After a final flushing with a chemical irrigant, some solution may remain in the root canal space, which can affect the surface of the biomaterial, altering its properties and roughness. 7 A previous study of the effect of irrigating solutions on microhardness of MTA showed a change in microhardness values of MTA following contact with irrigation solutions. 8 No previous studies have explored the effect of different irrigants on surface properties of Biodentine, especially in perforation cases.…”

Antimicrobial and antibiofilm activities of MTA supplemented with bismuth lipophilic nanoparticles

“…To determine whether addition of bismuth nanoparticles could change the mechanical properties of MTA, the microhardness and surface roughness were analyzed 19,20) . Disks of 5 mm of diameter and 2 mm of depth of MTA and MTA-BisBAL NPs were employed.…”

A Review Over Benefits and Drawbacks of Combining Sodium Hypochlorite with Other Endodontic Materials

“…Ballester-Palacios et al . [ 69 ] showed that 5% NaOCl significantly reduces the surface roughness of Portland cement. It also lowered the MTA roughness.…”