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. 2023 Jun 12;15(12):2649. doi: 10.3390/polym15122649

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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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HPLF-laden collagen scaffolds constructed from dental LEDs. (a) Strain test (%) of collagen structures cured with the dental LED at different times. The stiffness of the 3 s/9 s/21 s group was higher than that of the 0 s group (*** p < 0.001). (b) The cell viability under the LED light for 3 s was higher than that of the 9 s and 21 s groups (** p < 0.01). (c–e) Collagen cell scaffolds were illuminated with the dental LED for 3 s/9 s/21 s and cell viability was tested by Live-Dead (bar: 100 µm).