Özgür IRMAK, Ekim Onur ORHAN, Emre MUMCU

The comparison 24-hour bonding performance of novel OrthoMTA and ProRootMTA on root dentin

Ann Med Res 2021;28(1):37-4237Annals of Medical Research DOI: 10.5455/annalsmedres.2020.04.322Original ArticleReceived: 09.04.2020 Accepted: 18.05.2020 Available online: 25.01.2021Corresponding Author: Ekim Onur Orhan, Department of Endodontics, Faculty of Dentistry, ESOGU, Eskisehir, TurkeyE-mail: ekimonurorhan@gmail.comINTRODUCTIONDental bioceramic cements are bioactive materials and they are indicated to use in multiple clinical conditions such as vital pulp treatments, tooth revitalization, immature roots, iatrogenic perforations and root canal obturation (1,2). ProRoot mineral trioxide aggregate (ProRootMTA) is the first introduced bioceramic cement to the dental market, as a perforation repair and retrograde grafting material (3). ProRootMTA could promote to osteogenic activity in resorptive defects, and apicoectomies (4,5). Moreover, ProRootMTA is the gold standard bioceramic cement for comparative studies in literature due to having long-term clinical results (2,6,7). Bioceramiccementsactasanalternativedentinreplacementmaterials.Thus,theadhesionofthebioceramic cement to dentin is fundamental for sealing. Althoughrootcanalsealersordifferentadhesivestrategies can establish firm adhesion of filling materials to the dentin substrate, the resinous-based relation may leave gaps (8). The contemporary approach in endodontic materialsistoassessvariousalternativeobturationmaterials to gutta-percha and sealers. In this manner, a novel bioceramic cement, OrthoMTA (BioMTA, Seoul, Korea), was introduced for total root canal grafting (9). According to its manufacturer, OrthoMTA was synthesized by the gold standard mineral trioxide aggregate’s active ingredient through a bioceramic manufacturing process (10). However, the composition of OrthoMTA has some differences between the ProRootMTA containing arsenic and chromium concentrations (11). Moreover, physical characteristics of OrthoMTA such as average particle size, curing duration are also different than ProRootMTA. Elemental composition and physical characteristics of bioceramic cements may affect its bioactivity and sealing properties (12). Thus, the purpose of this study was to compare the 24-hour push-out bond strength of OrthoMTA, as a novel canal grafting bioceramic cement, with gold standard ProRootMTA on the root dentin substrate. The 0 hypothesis was that there would not differences between OrthoMTA and ProRootMTA. The comparison 24-hour bonding performance of novel OrthoMTA and ProRootMTA on root dentinEkim Onur Orhan1, Ozgur Irmak2, Emre Mumcu31Department of Endodontics, Faculty of Dentistry, ESOGU, Eskisehir, Turkey2Department of Restorative Dentistry, Faculty of Dentistry, Near East University, Mersin, Turkey3Department of Prosthodontology, Faculty of Dentistry, ESOGU, Eskisehir, TurkeyCopyright@Author(s) - Available online at www.annalsmedres.orgContent of this journal is licensed under a Creative Commons Attribution-NonCommercial 4.0 International LicenseAbstractAim: Bioceramic cements act as an alternative dentin replacement materials. The aim was to compare 24h push-out bond strength of novel OrthoMTA (BioMTA, Seoul, Korea) cement, and ProRootMTA(Dentsply Sirona, Tulsa, OK, USA) cement on root dentin.Materials and Methods: Twenty mandibular first premolar teeth were randomly divided into two groups. In each group, three 1-mm thick slices were obtained from the middle third of the root by cutting horizontally. Thirty root slices were obtained from ten roots. In the sectioned root slices, a cavity-like hole was prepared in the center and OrthoMTA and ProRootMTA were placed into the holes per groups. Samples were kept at 36°C, 100% humidity for 24h. The push-out bond strength was calculated (MPa). The critical point drying of all samples was performed followed by scanning electron microscopy evaluation. Results: Adhesive-type of failure at the cement-dentin interface, cohesive-type of failure within the bioceramic cement, and combination of adhesive- and cohesive-type of failures termed as mixed-type of failure were observed. One-way analysis of variance followed by Tukey's test was performed (p

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