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PubMedDate not supplied

Inability of calcium hydroxide to induce reparative dentinogenesis at non-peripheral sites of dog dental pulp.

The ability of 2 calcium hydroxide-containing materials to induce initiation of reparative dentinogenesis was tested at sites remote from the dentinogenically-active regions of the pulp periphery. Pieces of the cements, Dycal and Life, were implanted in central parenchymal sites of dog dental pulps for periods of 6, 14 and 42 days, respectively. Similar pieces were placed in peripheral capping sites as controls. The responses were analyzed by light and transmission electron microscopy. Induction of tubular dentin matrix lined with elongated and polarized odontoblast-like cells was only seen at peripheral capping sites. In response to the centrally implanted cements, only atubular hard tissue with lining fibroblast-like cells was deposited.

Animals↗
PubMedDate not supplied

Evaluation of apical seal with Renew (calcium hydroxide) and Synthograft (tricalcium phosphate) in teeth with open apices.

The study was conducted in vivo (30 teeth) and in-vitro (135 teeth) to evaluate the leakage of apical plug with Renew, Synthograft and Control. In-vivo it was observed that Renew is significantly effective and it showed its immediate effect after filling whereas the Synthograft is not effective immediately but it is effective after 3 months and in control group the apical plug was effective after six months. When examined in vitro, it was observed that there was more leakage in Synthograft and control as compared to Renew in anterior, premolars and molars.

Calcium Hydroxide↗
PubMed1990

[Penetration of calcium hydroxide based cements by dental enamel conditioning acids].

It was verified the penetration of phosphoric acid into 3 commercial calcium hydroxide-based cements (Life, Renew and Prisma VLC Dycal). The colorimetric method employed permitted the identidication of phosphorus amount in representative samples of 6 successive layers 0.1 mm thick of each material. The acid etching used were the commercial products Scotchbond Etching Gel--3M at 36.114% by weight and Solução Condicionadora--Johnson & Johnson at 36.054% by weight. The contact time was 60 seconds. The result showed that layers 0.1 mm tick for Life and Prisma VLC Dycal and 0.2 mm thick for Renew were able to block the penetration of phosphoric acid solution whereas layers 0.1 mm thick for the 3 cements were able to block the penetration of phosphoric acid gel.

Acid Etching, Dental↗