The Effect of Chlorhexidine on Push-out Bond Strength of Mineral Trioxide Aggregate

Abstract

Background: Trioxide Aggregate (MTA) has been widely used in root canal therapy. MTA has been mixed with chlorhexidine to increase its antimicrobial effect. Objectives: The aim of this study was to evaluate the effect of chlorhexidine (2%) on push-out bond strength of Mineral Trioxide Aggregate (MTA). Materials and Methods:Sixty dentin disks with a thickness of 1.5 ± 0.2 mm and lumen size of 1.3 mm were prepared. Dentin disks were randomly divided into four groups (n = 15), and their lumens were filled with MTA mixed with distilled water (groups 1 and 3) or with chlorhexidine 2% (groups 2 and 4). Specimens were incubated at 37°C for 3 days (groups 1 and 2) or 21 days (groups 3 and 4). Bond strengths of the MTA-treated dentin surfaces were evaluated using a universal testing machine, and bond failure on the disks was examined by light microscope. Data was analyzed using Kruskal-Wallis H test (P = 0.976). Results: There were no statistically significant differences between all the experimental groups. The mode of bond failure was predominantly mixed for distilled water groups and cohesive for CHX groups. Conclusions: This study suggested that chlorhexidine had no negative effect on the bond strengths of MTA-treated dentin.

Evaluation the Marginal Adaptation for the Bio C Repair and Other Root end Filling Material by Using Scanning Electron Microscope (A Comparative In Vitro Study)

“…It should be easy to manipulate and should be radiopaque, among other requirements, addition to these properties, it must be dimensionally stable, non-resorbable, and impervious to moisture. 4 Bioceramic root end filling material has shown to have success rate 86.4-95.6 in the last years and its showed high success rate in comparison to amalgam [2]. MTA was tested extensively in many vivo and vitro studies over the last years.…”

“…3 Root end filling material should be antimicrobial, nontoxic, and biocompatible, radiopaque, non-resorbable, dimensionally stable, resist dislocating forces, withstand breakdown or dissolution by tissue fluids, be easily handled, and be able to adapt to the dentinal walls of root canal system . 4 Numerous materials had been used as root end filling material, Amalgam is one of the most used root-end filling materials its remain the standard to which other materials are evaluated .It is durable, less technically sensitive, easy to handle, has minimal technical time compared to other materials and its corrosion products seal the apex surface and prevent leakage of bacteria. Some of the disadvantages are local allergic reactions, mercury toxicity and lack of chemical bonding with dentin.…”

The effect of chlorhexidine mixed with mineral trioxide aggregate on bacterial leakage of apical plug in simulated immature teeth using human fresh saliva

“…demonstrated that CHX has no adverse effect on setting process of MTA and the push out bond strength of MTA/H 2 O was not significantly different from MTA/CHX. [ 20 ]…”

“…However, it cannot simulate the thermal cycles of the mouth, dietary regimen, or the salivary flow. [ 18 20 22 ]…”