Preliminary Evidence That Bioactive Cements Occlude Artificial Marginal Gaps

Jefferies, Steven R.; Fuller, Alexander E.; Boston, Daniel W.

doi:10.1111/jerd.12133

Cited by 19 publications

(23 citation statements)

References 30 publications

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“…Thus, an acidic pH induced by glass ionomers presumably describes the inability of glass ionomers to support apatite precipitation. Our findings are in agreement with a previous study which showed that MTA, as a calcium silicate cement, exhibited rapid closure of artificial marginal gaps compared with calcium aluminate‐glass ionomer, whereas conventional glass ionomer and resin‐modified glass ionomers did not reveal gap closure capability .…”

Section: Discussionsupporting

confidence: 93%

Calcium phosphate precipitation in experimental gaps between fluoride‐containing fast‐setting calcium silicate cement and dentin

Ranjkesh

Ding

Dalstra

et al. 2018

European J Oral Sciences

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A novel fast-setting calcium silicate cement containing fluoride (novel-CSC) has been developed for applications in tooth crowns. The aim of this study was to assess the ability of the novel-CSC to close the experimental gaps at the dentin-cement interface. The novel-CSC was tested against Vitrebond and GC Fuji II LC. Experimental gaps of 50 or 300 μm width were created between the materials and dentin. Specimens with the 300-μm-wide gap were immersed in phosphate-buffered saline and the closed gap area was measured during 96 h. All specimens with 50 or 300 μm gap width were analyzed by scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM/EDX) to assess the morphology and chemical composition of the precipitates after 96 h immersion in phosphate-buffered saline. High-resolution micro-computed tomography (μCT) was used to evaluate the integrity and continuity of the precipitiates after 96 h and 180 d. In all novel-CSC samples, precipitates closed the gap area completely after 96 h. The SEM/EDX revealed that the globular precipitates closing the gap area were mainly composed of calcium and phosphorus. After 180 d, μCT indicated thicker precipitates compared with initial precipitates only in the novel-CSC group, whereas no precipitates were observed in resin-modified glass ionomers. Novel-CSC promoted continuous precipitation of calcium phosphate, including apatite, and closed the experimental gaps.

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Section: Discussionsupporting

confidence: 93%

Calcium phosphate precipitation in experimental gaps between fluoride‐containing fast‐setting calcium silicate cement and dentin

Ranjkesh

Ding

Dalstra

et al. 2018

European J Oral Sciences

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“…On the contrary, in a comparative study done by Jefferies et al [50] to explore whether bioactive dental cement has the ability to seal the marginal gap in comparison to other classes of dental cements. They pointed out that Ceramir can occlude the marginal gap areas.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of marginal fit and microleakage of monolithic zirconia crowns cemented by bio-active and glass ionomer cements: In vitro study

Aboelenen

Mokhtar²,

Zaghloul³

2020

BDS

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Objective: To evaluate the marginal fit and microleakage of monolithic zirconia crowns cemented with bioactive cement (Ceramir) compared to that cemented with glass ionomer cement and to evaluate the effect of thermocycling on marginal fit. Materials and methods: Twenty sound human molar teeth were prepared to receive a monolithic zirconia crowns. Teeth were divided randomly into two equal groups according to the type of luting cement. Group I: glass ionomer cement and group II: Ceramir cement. After cementation, the vertical marginal gap was assessed by using stereomicroscope before and after thermocycling. Twenty equidistant measurement points were taken for each crown. Leakage assessment was carried out using Fuchsin dye penetration followed by digital photography under a stereomicroscope. Data were analyzed by Mann-Whitney U test to compare between the two luting cements. Wilcoxon signed-rank test was used to evaluate the effect of thermocycling on the marginal fit (P ≤ 0.05) Results: Whether before or after thermocycling, the results showed no significant difference between the marginal gap values of the two tested groups. For both groups, there was a significant increase in marginal gap values after thermocycling. Also, there was no significant difference between leakage scores of the two tested groups. Conclusions: Similarity in the physical properties and chemical composition of the two cements result in a non- significant effect on the vertical marginal fit and the extent of microleakage of translucent zirconia crowns. Thermocycling had a negative impact on the vertical marginal gap of the two tested luting agents.

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“…Since apatite is the most stable mineral of calcium and phosphate at a pH over 8, the precipitated material was assumed to be apatite 11 . The other clinical function of this precipitated hydroxyapatite is to occlude an open cement gap at a crown margin 12 . In a laboratory study, discs of human dentin and calcium aluminate cement (Ceramir Crown and Bridge) were separated by a mylar film of 50 μm and placed in a phosphate containing solution for up to 8 months.…”

Section: Introductionmentioning

confidence: 99%

“…The gap between the discs was observed with light microcopy, and the calcium aluminate cement specimens were capable of filling the cement gap with an apatite precipitate. 12 A calcium aluminate-based cement was shown to precipitate surface hydroxyapatite, whereas a glass ionomer and a resinglass ionomer hybrid (Activa Bioactive Restorative) material did not. 10,13 Aside from hydroxyapatite deposition, bioactive cements have also been credited with releasing ions that may help prevent demineralization of surrounding tooth structure.…”

mentioning

confidence: 99%

“…11 The other clinical function of this precipitated hydroxyapatite is to occlude an open cement gap at a crown margin. 12 In a laboratory study, discs of human dentin and calcium aluminate cement (Ceramir Crown and Bridge) were separated by a mylar film of 50 μm and placed in a phosphate containing solution for up to 8 months. The gap between the discs was observed with light microcopy, and the calcium aluminate cement specimens were capable of filling the cement gap with an apatite precipitate.…”

mentioning

confidence: 99%

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Inhibition of root dentin demineralization by ion releasing cements

Huang

Blatz

Arce

et al. 2020

J Esthet Restor Dent

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Objectives: To compare the ability of resin-modified glass ionomer (RMGI) and bioactive cements to prevent root dentin demineralization. Materials and Methods: Fifty molars were prepared at the cementum-enamel junction (n = 10) and restored with three bioactive cements (Activa Bioactive Cement, ACT; Ceramir Crown and Bridge, CER; and Theracem, THE), a self-adhesive resin cement (Rely X Unicem 2, UNI), and a RMGI cement (Rely X Luting Plus, LUT). Specimens were cycled for 30 days between a demineralization solution (pH = 4) composed of 0.1 M lactic acid and 3 mM Ca 3 (PO 4) 2 for 4 hours and a remineralization solution (pH = 7.0) composed of 1.5 mM Ca, 0.9 mM P, and 20 mM Tris(hydroxymethyl)-aminomethane for 20 hours. Specimens were sectioned to 100 μm and evaluated with polarized light microscopy. A line was drawn parallel with the zone of demineralization for each tooth. The areas of "inhibition" (external to the line) were measured as positive values and "wall lesions" (pulpal to the line) were measured as negative areas. Results: Significant differences were found between materials for "inhibition/wall lesion"

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Preliminary Evidence That Bioactive Cements Occlude Artificial Marginal Gaps

Cited by 19 publications

References 30 publications

Calcium phosphate precipitation in experimental gaps between fluoride‐containing fast‐setting calcium silicate cement and dentin

Calcium phosphate precipitation in experimental gaps between fluoride‐containing fast‐setting calcium silicate cement and dentin

Evaluation of marginal fit and microleakage of monolithic zirconia crowns cemented by bio-active and glass ionomer cements: In vitro study

Inhibition of root dentin demineralization by ion releasing cements

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