The Comparison of Retention Between Overdenture Copings Manufactured by DMLS, CAD and Conventional Casting Techniques | ||
| Al-Rafidain Dental Journal | ||
| Article 17, Volume 23, Issue 1, March 2023, Pages 180-186 PDF (444.77 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.33899/rdenj.2021.130871.1120 | ||
| Authors | ||
| Yaman Aahed Alhamamy* ; Ahmed Al-Ali | ||
| Department of Prosthodontics, College of Dentistry, Mosul University, Mosul, Iraq | ||
| Abstract | ||
| Aims: To compare the retention of copings produced by Direct Metal Laser Sintering (DMLS), Hard metal CAM (Computer Assisted Milling) and conventional casting techniques. Materials and Methods: An implant abutment was used as an ideal model which was scanned by 3D scanner and 8 copings of each group were fabricated from a single STL file. Each specimen was seated, luted, and mounted on a vertical column universal testing machine for a pull-off test. Dislodgement readings were recorded and statistically analyzed with ANOVA test and Duncan’s multiple range test. Results: Significant difference was found between the studied groups in retention. The laser-sintered group showed the highest force required for dislodgement followed by conventional casting group then by the hard metal milling group. Conclusions: within the limitations of this study, Laser sintered group has the superior retention above the other two groups | ||
| Keywords | ||
| Retention,,; ,،,؛Overdenture,,; ,،,؛Coping,,; ,،,؛DMLS,,; ,،,؛CAD/CAM | ||
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