Journal title
عنوان نشریه
Journal of Dentomaxillofacial
Literature & Humanities
http://3dj.gums.ac.ir
1
admin
doi
en
jalali
1399
7
1
gregorian
2020
10
1
9
4
online
1
fulltext
en
Research Paper: Investigating the Stress DistributionApplied to Edentulous Ridge from Polyamide and Cbalt-Chrome
Removable-Partial-Denture usingThree-Dimensional Finite-
Element-Analysis
So on
So on
پژوهشي
Original article
<div style="text-align: justify;">Introduction: The objective of this study was to compare the Von-Mises-stress (VMS) distribution applied to the edentulous ridges from a Polyamide RPD (PRPD) with those from a Cobalt-Chrome RPD (CCRPD).<br>
Materials and Methods: A patient with mandibular Kennedy Class I, Mod I was<br>
selected. The patient’s CBCT was cut off at 1 mm sections from the axial dimension. DICOM files were created. A three-dimensional-bone-model was prepared by<br>
segmenting the DICOM files and loading them in MIMICS software and the necessary modifications were applied on them using Geomagic software. The three-dimensional-designs were first developed using Exocad2016 CAD software. An extensive force equivalent to 150N was applied. Abaqus Software was used in order to meshing. Then the stresses applied on the left and right sides of the edentulous ridges were measured.<br>
Results: In both models, the highest distribution of VMS in the edentulous ridges was observed exactly distal to the abutment teeth adjunct to the distal-extension-areas. In CCRPD, the mean stress on the left-edentulous-ridge was 220kPa and on the right-edentulous-ridge was 100kPa. In PARPD, the mean stress on the left-side-edentulous-ridge was 950kPa and on the right-side-edentulous-ridge was 600kPa. The amount of stresses on the edentulous ridges in the PARPD model (form 280Pa to 950PA) were too much less than those of CCRPD model (from 50kPa to 220kPa).<br>
Conclusion:The polyamide bases can be flexed due to the applied forces and the forces can be distributed in them. So that PRPD can transfer very slight stresses to the underneath surfaces compared to CCRPD.<br>
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</div>
Denture, Partial, Removable, Finite Element Analysis, Chromium Alloys
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http://3dj.gums.ac.ir/browse.php?a_code=A-10-1-153&slc_lang=en&sid=1
Mehran
Bahrami
.
0000-0002-1920-6442
No
Assistant professor, Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, North Amirabad Ave, Tehran, Iran.
Bahareh
Shakeri
.
No
Doctor of Dental Surgery (DDS), Private Office, Tehran, Iran
Maryam
Memarian
memarian@sina.tums.ac.ir
0000-0001-5264-4404
Yes
Associate professor, Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, North Amirabad Ave, Tehran, Iran.