الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 131 |  |  |
| | | from | 131 | | |
Abstract
The main aim of this study was to evaluate and compare the sealing capability, adaptability, and antibacterial properties of Nano-MTA Plus in relation to the conventional MTA Fillapex. A set of 60 intact permanent maxillary central incisors, recently taken from human individuals, was acquired. The incisors were chosen for their regular range of curvature, exhibiting an angle of less than 10˚, and uniform radii. After the establishment of a conventional access cavity, the canals underwent instrumentation using a crown-down technique with mpro Rotary Files of varying size, specifically 18/0.04, 20/0.04, and 25/0.06. The cleaning and shaping procedures were conducted utilising a manual stainless steel K-file, extending to a master apical file ISO size #40. During the process of root canal preparation, a solution of sodium hypochlorite (NaOCl) with a concentration of 5.25% was utilised as a root canal irrigant. Following this, a conclusive irrigation procedure was executed by alternating the application of a 5.25% sodium hypochlorite (NaOCl) solution and a 17% ethylenediaminetetraacetic acid (EDTA) solution, with an intermediate rinse of saline. The procedure of root canal obturation was carried out using the cold lateral compaction technique, which involved the use of a gutta-percha master cone with an ISO size of 40. The samples were subjected to radiographic evaluation in both the mesio-distal and bucco-lingual orientations to determine the quality of the obturation. The samples underwent exposure to a controlled environment characterised by a humidity level of 100% and a temperature of 37°C for a period of 7 days. This was done to ensure the complete solidification of the sealer.The specimens were assigned number identifiers and then divided into two groups using a random and fair allocation approach depending on the type of sealer used in the obturation procedure.
The evaluation of antibacterial activity was performed by quantifying the widths of the zones of inhibition in the development of microorganisms. The mean values and standard deviations were calculated for each group, and a statistical analysis was conducted to determine whether there were any significant differences present.
The results revealed that the mean diameter of the inhibition zone in the MTA Fillapex group was 14.25±6.70 mm, but it decreased to 11.00±9.42 mm in the Nano-MTA Plus group.
In summary, drawing from the experimental parameters employed in this in-vitro investigation, it can be deduced that Nano-MTA Plus and MTA Fillapex demonstrate comparable capacity for sealing and effectiveness against bacteria. In the context of adaption, MTA Fillapex has demonstrated a higher level of superiority compared to Nano-MTA Plus.