Subcutaneous Connective Tissue Reactions to Three Types of Bioactive Glass Nanopowders

Mehdikhani-Nahrkhalajil, M; Mh, Fathi; Mortazavi,; Sb, Mousavi; Sm, Razavi

doi:10.1166/jbn.2011.1308

Cited by 6 publications

(3 citation statements)

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“…Because the crystals structure and chemical composition of n-FA was similar to those of HA, n-FA had the analogous physical and chemical properties to n-HA. [24][25][26] it was reasonable to assume that n-FA had much higher solubility or dissociation degree under neutral condition. When ionic species reached super-saturation, nucleation and crystallization occurred on the enamel surface.…”

Section: Discussionmentioning

confidence: 99%

Effects of Different pH Conditions on Enamel Erosion Repair by Nano Fluorapatite Pastes

Wang¹,

Zhang²,

Wei³

et al. 2012

j nanosci nanotechnol

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The effects of different pH conditions on enamel erosion repair by nano fluorapatite (n-FA) pastes were evaluated in this study. Eighteen human dental enamel blocks with artificially-induced erosion were randomly divided into three groups that were coated with n-FA pastes with 3 different pH values (pH < 1, pH = 4.5 and pH = 7.5, respectively) for 15 minutes. SEM, XRD, XPS, Vickers microhardness test and mass measurement were performed for the enamels before and after treatment. A layer of enamel-like fluoride substituted hydroxyapatite was observed on the surface of all the samples. After treatment by n-FA pastes with 3 different pH values (pH < 1, pH = 4.5 and pH = 7.5), the Vickers micro-hardness value was respectively changed to 125.9 HV, 252.1 HV and 304.9 HV from 241.3 HV of the artificial enamel erosion, and mass loss was 0.75 mg/mm2, 0.41 mg/mm2 and 0.30 mg/mm2, respectively. SEM analysis showed that the surface of the enamels treated by n-FA pastes with pH 7.5 and pH 4.5 was smoother than those treated by n-FA pastes with pH < 1. These results suggested that the pH value had significant effects for the repairment of enamel erosion with n-FA pastes. This study demonstrated that the n-FA paste with neutral pH value (7.5) for enamel erosion repair would not only significantly enhance the enamel surface hardness, but also avoid the enamel mass loss and increased surface roughness.

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Section: Discussionmentioning

confidence: 99%

Effects of Different pH Conditions on Enamel Erosion Repair by Nano Fluorapatite Pastes

Wang¹,

Zhang²,

Wei³

et al. 2012

j nanosci nanotechnol

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show abstract

“…BGs possess an antibacterial effect against common bacteria as a result of the high aqueous pH value of the medium. [140][141][142][143][144][145] The pH of the medium increases as a result of the dissolution of alkaline ions such as Na, P, Si and Ca ions from BG. 146 BGs show a variation in sensitivity against both Gram-negative and Grampositive bacteria, which is mainly linked to the composition of BG, in particular, the content of calcium ions (Table 3).…”

Section: Antibacterial Propertiesmentioning

confidence: 99%

“…146 BGs show a variation in sensitivity against both Gram-negative and Grampositive bacteria, which is mainly linked to the composition of BG, in particular, the content of calcium ions (Table 3). [140][141][142][143][144][145] Fig. 11 Comparison of the amount of serum protein adsorbed onto thermally treated and control untreated BG.…”

Section: Antibacterial Propertiesmentioning

confidence: 99%