Bond strength between dentine and a novel fast‐setting calcium silicate cement with fluoride

Abstract

Bond strength between dentine and a novel fast-setting calcium silicate cement with fluoride Ranjkesh B, Kopperud HM, Kopperud SE, Løvschall H. Bond strength between dentine and a novel fast-setting calcium silicate cement with fluoride. Eur J Oral Sci 2019; 127: 564-569. © 2019 Eur J Oral SciThe aim of this study was to evaluate the dentine bond strength of a novel fast-setting calcium silicate cement (Protooth) versus a calcium hydroxide-based cement (Dycal), a calcium silicate cement (ProRoot MTA), and a glass ionomer cement (Ketac-Molar). Mid-root dentine slices of 1 mm thickness were obtained from human maxillary incisors. After enlarging the lumen of the canal to 1.3 mm, the cavities were randomly filled with test materials. Samples were immersed in physiological-like solution. The push-out bond strength was tested on days 1, 28, and 180 (n = 12). Failure types of bonding were determined using a stereomicroscope. We analysed the data using linear regression. Dycal and day 1 were considered as reference for cement type and assessment time, respectively. Protooth, Ketac-Molar, and ProRoot MTA demonstrated higher push-out bond strength than Dycal. The pushout bond strength in the Protooth group increased on day 28 and 180. The bond strength of Ketac-Molar was significantly reduced on day 28. Dycal showed a significant decrease in bond strength on day 180 compared with that on day 1 and 28. Mixed failure was the dominant failure type. Protooth bonding to dentine was increased with time, in contrast to that of ProRoot MTA, Dycal, and Ketac-Molar, as a function of time.

Calcium hydroxide paste removal strategies and bond strengths of epoxy‐ and silicate‐based sealers

“…The Ca(OH) 2 paste remnants influenced only the bond strength of AH Plus sealer, which in the absence of the Ca(OH) 2 paste in the control group resulted in higher bond strength values than SN, independent of the root third. Furthermore, the SN group presented lower Ca(OH) 2 removal from the root canal, regardless of the root third, and the remaining paste may have changed the interaction of this sealer with the root dentin due to the lower levels covalent bonds formation or root canal dentinal tubule penetration (25‐27), thereby justifying the results obtained. The bond strength values were similar in all cases, except for the middle third of SN, regardless of Ca(OH) 2 paste remnants with regard to the MTA Fillapex sealer.…”

Pull-out bond strength of titanium post cemented with novel fast-setting calcium silicate cement

“…Studies demonstrated that innovated calcium silicate cement (Protooth) has improved diametral tensile strength in comparison to ProRoot MTA ( 19 ), and higher bonding ability to dentine compared to ProRoot MTA and glass ionomer cement ( 21 ). This supports the finding of the current study proposing an improvement on properties of the earlier generation of calcium silicate cement (ProRoot MTA) that would potentially match and exceed the bond strength of traditional zinc phosphate and glass ionomer cements.…”

“…The apatite-forming ability of calcium silicate cement contributes to biomineralization ( 20 ), dentine bonding enhancement ( 21 ), gap closure at the dentine-cement interface ( 20 ), and bacterial microleakage reduction ( 33 ). The presence of fluoride composition accelerates the apatite-forming ability of the cement ( 12 ).…”

“…Induced high alkaline pH due to substantial calcium hydroxide release by calcium silicate cements during setting advocates the antibacterial properties to these cement ( 34 ), which is in contrast to acidic glass ionomer and zinc phosphate cements. Indeed, glass ionomer cements are able to chemically bond to tooth substrates ( 35 ) that tends to decrease overtime ( 21 ). Zinc phosphate cement does not provide a chemical adhesion and the retention basically relies on mechanical retention to rough surface irregularities ( 36 ).…”

“…The Protooth formulation has higher mechanical properties than other calcium silicate cements (ProRoot MTA and Biodentine) ( 19 ) with the ability to support superficial apatite deposition when immersed in phosphate-buffered solution ( 12 ). The apatite-forming ability of Protooth endorses closure of the experimental gaps at the cement-dentine interface ( 20 ), and improves its bonding to dentine over time ( 21 ). Biocompatibility of Protooth has been documented in vitro ( 22 ) and in vivo ( 23 - 25 ).…”