pH and calcium ion release evaluation of pure and calcium hydroxide-containing Epiphany for use in retrograde filling

Abstract

ObjectiveHydroxyl (OH-) and calcium (Ca++) ion release was evaluated in six materials: G1) Sealer 26, G2) White mineral trioxide aggregate (MTA), G3) epiphany, G4) epiphany + 10% calcium hydroxide (CH), G5) epiphany + 20% CH, and G6) zinc oxide and eugenol.Material and MethodsSpecimens were placed in polyethylene tubes and immersed in distilled water. After 3, 6, 12, 24, and 48 h, 7, 14, and 28 days, the water was assessed for pH with a pH meter and for Ca++ release by atomic absorption spectrophotometry.ResultsG1, G2, G4, and G5 had the highest pH until 14 days (p<0.05). G1 presented the highest Ca++ release until 6 h, and G4 and G5, from 12 h through 14 days. Ca++ release was greater for G1 and G2 at 28 days. G6 released the least Ca++.ConclusionMTA, Sealer 26, epiphany, and epiphany + CH release OH - and Ca++ ions. Epiphany + CH may be an alternative as retrofilling material.

Evaluation of apoptosis/necrosis and cytokine release provoked by three root canal sealers in human polymorphonuclears and monocytes

“…Such divergence could be explained by differences in the molecular control of PMN apoptosis compared to monocytes, and the difference regarding Ca 2+ release over time by the sealers, which result in pH alterations (Tanomaru‐Filho et al . , Candeiro et al . ).…”

“…) and S26 is an epoxy resin‐based sealer containing calcium hydroxide (Tanomaru‐Filho et al . ), END contains zirconium oxide, calcium silicates, calcium phosphate monobasic and calcium hydroxide (Hess et al . ).…”

Push-out Bond Strength of Root-end Filling Materials

“…Sealer 26 is known for its excellent sealing properties, when used either as root canal sealer or in root-end fillings (9). This material also has biocompatibility if used as root-end filling material (10), proper radiopacity and calcium ion release (11).…”

Determinação do pH e da liberação de íons cálcio de três cimentos endodônticos quando utilizados em obturações, em conjunto com guta-percha, e da qualidade das mesmas. Avaliação realizada em longo prazo

“…No que se refere aos estudos in vitro, várias foram as formas descritas e utilizadas para a determinação do pH, como o uso do potenciômetro (TAMBURIC, VULETA, OGNJANOVIC, 1993), corante (STAEHLE et al, 1995) e peagômetro (ANTHONY; GORDON; DEL RIO, 1982;GORDON, ALEXANDER, 1886;TORABINEJAD et al, 1995;DEAL et al, 2002;DUARTE et al, 2003;DUARTE et al, 2004;FERREIRA et al, 2004;SANTOS et al, 2005;CHNG et al, 2005;YAP., 2006;ELDENIZ et al, 2007;BAE et al, 2011;TANOMARU-FILHO et al, 2011;MASSI et al, 2011;CANDEIRO et al, 2012;FARIA-JÚNIOR et al, 2013;SILVA et al, 2013;KUGA et al, 2014;VIAPIANA et al, 2014). A utilização de corantes como o vermelho cresol a 1%, utilizado por Staehle et al (1995), determina a ocorrência ou não da alcalinização pelo método visual, não fornecendo valores quantitativos.…”

“…A determinação da liberação de íons cálcio pode ser realizada empregando-se o potenciômetro com eletrodo seletivo para cálcio (TAMBURIC; VULETTA; OGNJANOVIVC, 1993;ÇALT et al, 1999), por meio de titulação e analisador específico de cálcio, sendo um método titulométrico (TAGGER; TAGGER; KFIR, 1988) ou por meio do espectrofotômetro de absorção atômica (LEONARDO et al, 1992;SILVA et al, 1997;DUARTE et al, 2000;DUARTE et al, 2003;DUARTE et al, 2004;DUARTE et al, 2009;ELDENIZ et al, 2007;TANOMARU-FILHO et al, 2009;TANOMARU-FILHO et al, 2011;MASSI et al, 2011;CANDEIRO et al, 2012;BORGES et al, 2012;VIAPIANA et al, 2014;KUGA et al, 2014), em dentes de acrílico HUNGARO DUARTE et al, 2012).…”