Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important?
Background: When selecting zirconia for a dental restoration, laboratory prescriptions often refer to high strength and high translucency. In this survey, zirconia specimens were ordered from various dental laboratories for posterior (high strength) and anterior (high translucency) clinical indicati...
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Elsevier
2023-01-01
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| Series: | JADA Foundational Science |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772414X22000147 |
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| author | Yifeng Liao, PhD Max Gruber, BSE Henry Lukic, BSE Jim McLees, CDT Si Chen, PhD Alan Boghosian, DDS Spiro Megremis, MS, PhD |
| author_facet | Yifeng Liao, PhD Max Gruber, BSE Henry Lukic, BSE Jim McLees, CDT Si Chen, PhD Alan Boghosian, DDS Spiro Megremis, MS, PhD |
| author_sort | Yifeng Liao, PhD |
| collection | DOAJ |
| description | Background: When selecting zirconia for a dental restoration, laboratory prescriptions often refer to high strength and high translucency. In this survey, zirconia specimens were ordered from various dental laboratories for posterior (high strength) and anterior (high translucency) clinical indications. The specimens were then tested and evaluated for their mechanical and physical behaviors. Methods: In a double-blinded manner, 9 laboratories provided 32 specimens from 17 different zirconia blanks, which were tested in the American Dental Association laboratory. Flexural strength tests were performed on standard specimens, and fracture surfaces were examined using both optical and scanning electron microscopy. Chemical composition, Vickers hardness, and absolute transmittance measurements were also performed. Results: A large scatter in the strength values was observed. The zirconia intended for posterior applications displayed strengths (SD) from 195 through 783 MPa (490 [183] MPa), which overlapped greatly with the strengths (SD) of the zirconia intended for anterior applications, 320 through 768 MPa (581 [136] MPa). However, when the strength values were recalculated on the basis of yttria content, the strengths (SD) were 584 (158) MPa for 3 mol% yttria and 373 (104) MPa for 5 mol% yttria. Conclusions: When a prescription was given to dental laboratories to request zirconia on the basis of clinical requirements, there was a large scatter and no consistency in the resulting strength values partly because of mixed use of 3 mol% and 5 mol% yttria zirconia. The 3 mol% materials had much higher strength when the strength values were grouped according to yttria content. Strength was also highly dependent on processing and finishing at the dental laboratories. |
| format | Article |
| id | doaj-art-2966fef1f9f34e1c8603b90e4d557616 |
| institution | DOAJ |
| issn | 2772-414X |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | JADA Foundational Science |
| spelling | doaj-art-2966fef1f9f34e1c8603b90e4d5576162025-08-20T02:46:50ZengElsevierJADA Foundational Science2772-414X2023-01-01210001810.1016/j.jfscie.2022.100018Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important?Yifeng Liao, PhD0Max Gruber, BSE1Henry Lukic, BSE2Jim McLees, CDT3Si Chen, PhD4Alan Boghosian, DDS5Spiro Megremis, MS, PhD6American Dental Association Standards & Research Institute, Chicago, ILAmerican Dental Association Standards & Research Institute, Chicago, ILAmerican Dental Association Standards & Research Institute, Chicago, ILZone Technologies, Kent, WAAdvanced Photon Source, Argonne National Laboratory, Lemont, ILDepartment of Otolaryngology (Dental Surgery), Feinberg School of Medicine, Northwestern University, Chicago, ILAmerican Dental Association Standards & Research Institute, Chicago, IL; Address correspondence to Dr Megremis.Background: When selecting zirconia for a dental restoration, laboratory prescriptions often refer to high strength and high translucency. In this survey, zirconia specimens were ordered from various dental laboratories for posterior (high strength) and anterior (high translucency) clinical indications. The specimens were then tested and evaluated for their mechanical and physical behaviors. Methods: In a double-blinded manner, 9 laboratories provided 32 specimens from 17 different zirconia blanks, which were tested in the American Dental Association laboratory. Flexural strength tests were performed on standard specimens, and fracture surfaces were examined using both optical and scanning electron microscopy. Chemical composition, Vickers hardness, and absolute transmittance measurements were also performed. Results: A large scatter in the strength values was observed. The zirconia intended for posterior applications displayed strengths (SD) from 195 through 783 MPa (490 [183] MPa), which overlapped greatly with the strengths (SD) of the zirconia intended for anterior applications, 320 through 768 MPa (581 [136] MPa). However, when the strength values were recalculated on the basis of yttria content, the strengths (SD) were 584 (158) MPa for 3 mol% yttria and 373 (104) MPa for 5 mol% yttria. Conclusions: When a prescription was given to dental laboratories to request zirconia on the basis of clinical requirements, there was a large scatter and no consistency in the resulting strength values partly because of mixed use of 3 mol% and 5 mol% yttria zirconia. The 3 mol% materials had much higher strength when the strength values were grouped according to yttria content. Strength was also highly dependent on processing and finishing at the dental laboratories.http://www.sciencedirect.com/science/article/pii/S2772414X22000147Dental zirconiayttria3 mol% yttria-tetragonal zirconia polycrystal (3Y-TZP)5 mol% yttria-partially stabilized zirconia (5Y-PSZ)high strengthhigh translucency |
| spellingShingle | Yifeng Liao, PhD Max Gruber, BSE Henry Lukic, BSE Jim McLees, CDT Si Chen, PhD Alan Boghosian, DDS Spiro Megremis, MS, PhD Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important? JADA Foundational Science Dental zirconia yttria 3 mol% yttria-tetragonal zirconia polycrystal (3Y-TZP) 5 mol% yttria-partially stabilized zirconia (5Y-PSZ) high strength high translucency |
| title | Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important? |
| title_full | Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important? |
| title_fullStr | Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important? |
| title_full_unstemmed | Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important? |
| title_short | Survey of the mechanical and physical behaviors of yttria-stabilized zirconia from multiple dental laboratoriesWhy Is This Important? |
| title_sort | survey of the mechanical and physical behaviors of yttria stabilized zirconia from multiple dental laboratorieswhy is this important |
| topic | Dental zirconia yttria 3 mol% yttria-tetragonal zirconia polycrystal (3Y-TZP) 5 mol% yttria-partially stabilized zirconia (5Y-PSZ) high strength high translucency |
| url | http://www.sciencedirect.com/science/article/pii/S2772414X22000147 |
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