Aim and Objective:The aim of this study is to evaluate and compare the effect of one shape, Neolix rotary single-file systems and WaveOne, Reciproc reciprocating single-file systems on pericervical dentin (PCD) using cone-beam computed tomography (CBCT).Materials and Methods:A total of 40 freshly extracted mandibular premolars were collected and divided into two groups, namely, Group A – Rotary: A1 – Neolix and A2 – OneShape and Group B – Reciprocating: B1 – WaveOne and B2 – Reciproc. Preoperative scans of each were taken followed by conventional access cavity preparation and working length determination with 10-k file. Instrumentation of the canal was done according to the respective file system, and postinstrumentation CBCT scans of teeth were obtained. 90 μm thick slices were obtained 4 mm apical and coronal to the cementoenamel junction. The PCD thickness was calculated as the shortest distance from the canal outline to the closest adjacent root surface, which was measured in four surfaces, i.e., facial, lingual, mesial, and distal for all the groups in the two obtained scans.Results:There was no significant difference found between rotary single-file systems and reciprocating single-file systems in their effect on PCD, but in Group B2, there was most significant loss of tooth structure in the mesial, lingual, and distal surface (P < 0.05).Conclusion:Reciproc single-file system removes more PCD as compared to other experimental groups, whereas Neolix single file system had the least effect on PCD.
Aim:
The purpose of this study was to evaluate and compare the effectiveness of phytic acid and ethylendiamine tetraacetic acid (EDTA) in the removal of calcium ion from radicular dentin during endodontic procedure.
Materials and Methods:
Twenty-five single-rooted mandibular premolar teeth were decoronated, and the roots were split longitudinally into two halves. Among obtained specimens, 45 specimens were randomly selected and divided into three groups (
n
= 15): Group 1 – distilled water, Group 2 – 17% EDTA, and Group 3 – 1% phytic acid. Samples in each group were immersed in the test solutions for specific time intervals, after which the same solution samples were subjected for the evaluation of amount of calcium ion release into the solution by Atomic Absorption Spectrophotometer. Data were analyzed using the one-way analysis of variance test.
Results:
The use of 17% EDTA resulted in more calcium ion loss as compared to 1% phytic acid and distilled water.
Conclusion:
One percent phytic acid seems to be an appropriate irrigating solution because of its less demineralizing effect as compared to 17% EDTA on radicular dentin.
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