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. 2022 Jul 11;26(11):6593–6605. doi: 10.1007/s00784-022-04611-w

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — Scanning electron micrograph images of etched glass–ceramic specimens taken with spot size 3 at magnifications 1200 × (a, c, e), and 5000 × (b, d, f) showing the crystalline morphology for the worn surfaces. PLD; partially crystallized lithium disilicate, FLD; fully crystallized lithium disilicate, ZLS; zirconia-reinforced lithium disilicate. Detached areas (continuous white arrows) and debris (dotted white arrows) are seen on the worn surface of PLD. A transverse crack is obvious on the worn surface of FLD (black arrow)