. 2021 May 12;13(5):701. doi: 10.3390/pharmaceutics13050701
© 2021 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/).
Figure 6.
I-vation (helical-shaped implant).