About Kothiwal Dental College and Research Centre

Kothiwal Dental College and Research Centre

Articles by Kothiwal Dental College and Research Centre

An evaluation of hardness of commercially available provisional restorative materials: An in vitro study

Published on: 9th January, 2020

OCLC Number/Unique Identifier: 8514677712

Statement of problem: Provisional restorations play a critical role in the success of restorative treatment so they must maintain their integrity in the oral environment throughout the diagnostic and restorative phases. Purpose: The aim of this study was to compare and evaluate the hardness of four different materials used fabrication of interim restoration. Material and methods: Ten samples with dimensions of 10mmx10mmx2mm were fabricated from four interim materials (DPI, Tempron, Protemp 4 and Transcan). Hardness of samples was measured using Fischer scope hardness tester. Result: The highest mean hardness was found in Heat polymerizing acrylic resin group. ANOVA test indicated F value to be 2201.01 which was highly significant (p < 0.001). Conclusion: Heat polymerizing resin and bisacrylics may be considered in a long term provisional fixed prosthesis.
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Stress evaluation of maxillary central incisor restored with different post materials: A finite element analysis

Published on: 21st July, 2020

OCLC Number/Unique Identifier: 8639114755

Introduction: With the availability of different post systems and various studies on the strength of teeth restored with posts, the controversy as to which post systems provide better stress distribution of post and longevity of tooth has not been resolved. The purpose of this study was to compare the stress distribution of three different post materials using finite element analysis. Materials and nethod: Three dimensional finite element models of central incisor, three posts with crown were constructed on computer with software. Posts of three different materials (Ni-Cr post, Glass fiber post, and Zirconia post)with zirconia crown were virtually generated and a force of 100 N was applied at an angle of 450 on the palatal surface of the crown. Von Mises stresses were evaluated on the cervical, middle and apical third of the root. Results: The maximum stresses were seen on the cervical one-third in each post material indicating that this region is more prone to fracture in tooth restored with posts. Among the three materials tested, Ni-Cr post showed maximum stress generation followed by Zirconia post and glass fiber post. The maximum stresses generated by the posts were 11.4 MPa, 10.58 MPa and 4.11 MPa respectively. Conclusion: The less rigid post material like glass fiber post can be used in an endodontically treated anterior teeth.
Cite this ArticleCrossMarkPublonsHarvard Library HOLLISGrowKudosResearchGateBase SearchOAI PMHAcademic MicrosoftScilitSemantic ScholarUniversite de ParisUW LibrariesSJSU King LibrarySJSU King LibraryNUS LibraryMcGillDET KGL BIBLiOTEKJCU DiscoveryUniversidad De LimaWorldCatVU on WorldCat
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