@article{Al Aali_Alhamdan_Maawadh_Vohra_Abduljabbar_2020, title={Influence of contemporary CAD-CAM milling systems on the fit and adaptation of partially stabilized Zirconia fixed partial dentures}, volume={37}, url={https://www.pjms.org.pk/index.php/pjms/article/view/3490}, DOI={10.12669/pjms.37.1.3490}, abstractNote={<p><em><strong>Objective:</strong></em> To evaluate marginal fit and internal adaptation of three-unit Zr frameworks fabricated from four Zr CAD/CAM milling systems.</p> <p><em><strong>Methods:</strong></em> Fixed partial denture models were replicated (40 stone models) using Polyvinyl Siloxane impression material (PVS) and type IV stone for Zr framework fabrication. FPDs were milled with four CAD/CAM systems, Group-II: LAVA™ Zirconia milled by LAVA™, Group-2: Vita In-Ceram YZ milled by Cerec®, Group-3: Zirconia milled by GM1000 and Group-4: Zirconia milled by DWX-50N. Twelve marginal gap measurements per framework were performed at pre-established points, with a metallurgical microscope (Zeiss, Germany) at 500X magnification. Eight measurements of cement space per section were performed for adaptation. Data was analyzed using ANOVA and Tukey post hoc test.</p> <p><em><strong>Results:</strong></em> Zirconia FPD frameworks exhibited gaps ranging from 16 to 50.1 µm for marginal fit and 26.8 to 102.5 µm for internal adaptation. Group-3 [20.8 (8.3) µm &amp; 50.3 (11.4) µm] and Group-4 [16.0 (4.0) µm &amp; 40.2 (8.8) µm] specimens showed significantly lower marginal fit and internal adaptation gaps compared to Group-I [50.1 (13.4) µm &amp; 100.5 (16.7) µm] and Group-2 [38.9 (8.2) µm &amp; 102.5 (13.4) µm] specimens respectively.</p> <p><em><strong>Conclusions:</strong> </em>Different CAD-CAM systems for fabrication of Zr FPD frameworks displayed a significant influence on marginal fit and internal adaptation of restorations.</p> <p><strong>doi: https://doi.org/10.12669/pjms.37.1.3490</strong></p> <p><em><strong>How to cite this:</strong></em><br>Al-Aali KA, Alhamdan RS, Maawadh AM, Vohra F, Abduljabbar T. Influence of contemporary CAD-CAM milling systems on the fit and adaptation of partially stabilized Zirconia fixed partial dentures. Pak J Med Sci. 2021;37(1):45-51.&nbsp;&nbsp;doi: https://doi.org/10.12669/pjms.37.1.3490</p> <p>This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</p&gt;}, number={1}, journal={Pakistan Journal of Medical Sciences}, author={Al Aali, Khulud and Alhamdan, Rana and Maawadh, Ahmed M and Vohra, Fahim and Abduljabbar, Tariq}, year={2020}, month={Dec.} }