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. 2023 Nov 15;12(22):7103. doi: 10.3390/jcm12227103

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Representative values for morphological comparison. The difference in the length from RP-1 between RRT on the impression data (acquired by digital or conventional impression techniques) (A) and TST on the tissue surface of RPD (B) was defined as the vertical displacement (VD), while the difference in the length from RP-2 between RRT (C) and TST (D) was defined as the horizontal displacement (HD). RP-1: reference plane #1; PR-2: reference plane #2; RRT: residual ridge top; and TST: tissue surface top.