Micro-computed tomographic analysis of the marginal adaptation of a calcium silicate-based cement to radicular dentin after removal of three different intracanal medicaments - An in vitro study

Abstract

Context: This study focuses on the marginal adaptation of a calcium silicate-based cement to the root dentin after retrieval of different intracanal medicaments. Aim: This study compared the marginal adaptation of a calcium silicate-based cement to radicular dentin in the apical third of the root canal following the use of three different intracanal medicaments. Materials and Methods: Forty single-rooted premolar teeth ( n = 40) were decoronated 13 mm above the root apices; then, 3 mm of the root tips were resected to standardize the root length. Orthograde cleaning and shaping were done using the rotary files and apical enlargement using peeso reamers. Depending on the intracanal medicament used, the samples were equally divided into four groups: Group 1 - control, Group 2 - Metapex, Group 3 - triple antibiotic paste (TAP), and Group 4 - calcium hydroxide with Propolis. Subsequently, the medicament was removed and a 3 mm apical barrier of Biodentine TM was placed and later scanned using an ex vivo micro-computed tomography scanner. Statistical Analysis Used: One-way ANOVA F -test and Tukey's post hoc test were used. Results: Maximum adaptation was seen in control group (0.65) > Propolis (1.47) > TAP (4.37) > Metapex (5.25); a high statistically significant difference between the four groups was found ( P < 0.001) with regard to the external voids between Biodentine TM and radicular dentin. Conclusion: On comparison of the marginal adaptation of Biodentine to root canal dentin following the use of three different intracanal medicaments, maximum adaptation was seen in Group 1, followed by Group 4, Group 3, and Group 2.

Marginal Adaptation and Porosity of a Novel MTA Brand Applied as Root-End Filling Material: A Micro-CT Study

“…Only a limited number of previous studies have used the same methodology to quantitatively assess the volume of interfacial gaps and inner porosity of selected CSCs applied as root-end filling materials. Some of them evaluated the loss of volume and density of tested CSCs exhibited after exposure to acidic or alkaline conditions, blood, or after retrieval of various intracanal medicaments, along with their marginal adaptation [25][26][27][28]. Given the differences in the study designs, our results were compared only with those obtained in similar experimental conditions, i.e., after material immersion in distilled water or in normal saline only.…”

“…Only Jardine et al [27] reported a higher rate of porosity with Biodentine than MTA-Angelus. According to micro-CT investigations, Biodentine demonstrated a TPV% within a range of 2.48-6.66% and external porosity volume percentage (EPV) between 0.616-3.78%, and CPV% varied between 0.024-4.46% [23][24][25][26][27][28]. Only Toia et al [32] reported an unusually high porosity percentage of 50.45%, making this result difficult to interpret.…”