Effect of acidic environment and intracanal medicament on push-out bond strength of biodentine and mineral trioxide aggregate plus: an in vitro study

Abstract

Introduction. This in-vitro study aims to evaluate the effect of acidic environment and intracanal medicament on push out bond strength of Biodentine and Mineral Trioxide Aggregate Plus (MTA Plus)
 Method. Forty extracted single rooted teeth were sectioned below the cement-enamel junction. The root canals were instrumented using rotary files and then peeso reamer was used to obtain standardized root canal dimension. Specimens were randomly classified into following groups- Group 1: calcium hydroxide in the absence of acidic environment; Group 2: calcium hydroxide in the presence of acidic environment; Group 3: no intracanal medicament in the absence of acidic environment; Group 4: no intracanal medicament in the presence of acidic environment. Specimens were kept for 7 days at room temperature. Thereafter, specimens of each group were transversely sectioned into 1 mm thick slices and divided into 2 sub-groups according to the use of biodentine and MTA Plus. Using Universal Testing Machine, push out bond strength test was carried out and the data were analyzed statistically.
 Results. There was no statistically significant difference in the bond strength of biodentine and MTA Plus (P>0.05). For both MTA Plus and biodentine, with or without calcium hydroxide, the push out bond strength was less in acidic environment and this difference was more pronounced without calcium hydroxide. In all the four groups, MTA plus showed comparable bond strength to biodentine.
 Conclusion. MTA Plus is a viable option for apexification. The push out bond strength of Biodentine and MTA Plus is impaired by acidic environment. Prior application of calcium hydroxide slightly increased the bond strength, though the difference was statistically insignificant.
 

An in-vitro comparison of bond strength of three different root end filling materials with Universal testing machine

“…The most important concern is adhesion of material to root wall dentin. 8 The present in vitro study has been carried out to compare the push out bond strength of root end filling materials.…”

Calcium silicate and calcium aluminate cements for dentistry reviewed

“…The calcium silicate cements may not set reliably in the acidic environment of an pulpal or periapical infection, [77][78][79] may dissolve in acidic conditions, and are affected by acidic irrigants 80 used in conjunction with a dental procedure. 81,82 The lower acid resistance of the calcium silicate cement has prevented their use as a restorative material, where materials are constantly exposed to our acidic diets. The advantage of calcium aluminate cement is its acid resistance, such as in bacterial environments, compared to the calcium silicate cements.…”

Effect of blood contamination on bond strength of different root‑end filling materials to dentin

“…2 Ancak MTA'nın uzun sertleşme süresi, zor manipülasyon özellikleri ve renk değişikliği potansiyeli gibi dezavantajları da bulunmaktadır. 3 Bu dezavantajları ortadan kaldırmak için yeni kalsiyum silikat esaslı materyaller geliştirilmiştir. 3 MTA Flow (Ultradent Products Inc., South Jordan, UT, ABD); di-trikalsiyum silikat, radyoopaklaştırıcı olarak bizmut oksit içeren son derece ince, gri renkli bir toz ve su bazlı bir jelden oluşan sıvının bileşimidir.…”

“…3 Bu dezavantajları ortadan kaldırmak için yeni kalsiyum silikat esaslı materyaller geliştirilmiştir. 3 MTA Flow (Ultradent Products Inc., South Jordan, UT, ABD); di-trikalsiyum silikat, radyoopaklaştırıcı olarak bizmut oksit içeren son derece ince, gri renkli bir toz ve su bazlı bir jelden oluşan sıvının bileşimidir. 4 Üretici tarafından, MTA Flow'un farklı toz/jel oranlarında manipüle edilebildiği, içeriğindeki özel jel ve ince taneli toz sayesinde kolayca karıştırılıp pürüzsüz bir kıvama ulaşılabildiği, sıvı ortamda çözünmeye karşı daha dirençli olduğu belirtilir.…”