Comparison of fracture resistance between cast, CAD/CAM milling, and direct metal laser sintering metal post systems

Journal of Prosthodontic Research
Mehmet Selim Bilginİbrahim Ersoy

Abstract

The purpose of this study was to compare the fracture resistance of Co-Cr post-cores fabricated with 3 different techniques: traditional casting (TC), computer-aided design and manufacturing (CAD/CAM) milling (CCM) and direct metal laser sintering (DMLS). Forty intact human mandibular premolar were endodontically treated. The roots were then randomly divided into four groups according to the post systems: the control group was only filled with gutta percha. Co-Cr metal posts were fabricated with TC, CCM and DMLS in the other three groups. The posts were luted with a resin cement and subjected to compression test at a crosshead speed of 1mm/min. The statistical analysis of the data was performed using one-way analysis of variance (ANOVA) and multiple comparison post hoc Tukey tests (α=.05). The samples were examined under a stereomicroscope with ×20 magnification for the evaluation of the fracture types. The mean fracture loads were 432.69 N for control, 608.89 N for TC, 689.40 N for DMLS and 959.26 N for CCM. One-way ANOVA revealed significant difference between the groups (p<0.01). In the post hoc Tukey test, there were significant differences between groups except DMLS and TC. While Co-Cr posts fabricated by TC and DMLS syste...Continue Reading

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Citations

Oct 14, 2017·Photomedicine and Laser Surgery·Perihan Oyar
Jun 18, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Marta Revilla-LeónMutlu Özcan
Mar 5, 2020·Biomaterial Investigations in Dentistry·Håvard Jostein HaugenGaute Floer Johnsen
Sep 29, 2019·World Journal of Clinical Cases·Hu-Di XuYu-Feng Zhang

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