Departmental Papers (Dental)

Document Type

Journal Article

Date of this Version

5-2016

Publication Source

Restorative Dentistry & Endodontics

Volume

41

Issue

2

Start Page

98

Last Page

105

DOI

10.5395/rde.2016.41.2.98

Abstract

Objectives

The biocompatibility of two experimental scaffolds for potential use in revascularization or pulp regeneration was evaluated.

Materials and Methods

One resilient lyophilized collagen scaffold (COLL), releasing metronidazole and clindamycin, was compared to an experimental injectable poly(lactic-co-glycolic) acid scaffold (PLGA), releasing clindamycin. Human dental pulp stem cells (hDPSCs) were seeded at densities of 1.0 × 104, 2.5 × 104, and 5.0 × 104. The cells were investigated by light microscopy (cell morphology), MTT assay (cell proliferation) and a cytokine (IL-8) ELISA test (biocompatibility).

Results

Under microscope, the morphology of cells coincubated for 7 days with the scaffolds appeared healthy with COLL. Cells in contact with PLGA showed signs of degeneration and apoptosis. MTT assay showed that at 5.0 × 104 hDPSCs, COLL demonstrated significantly higher cell proliferation rates than cells in media only (control, p < 0.01) or cells co-incubated with PLGA (p < 0.01). In ELISA test, no significant differences were observed between cells with media only and COLL at 1, 3, and 6 days. Cells incubated with PLGA expressed significantly higher IL-8 than the control at all time points (p < 0.01) and compared to COLL after 1 and 3 days (p < 0.01).

Conclusions

The COLL showed superior biocompatibility and thus may be suitable for endodontic regeneration purposes.

Copyright/Permission Statement

Made available with a CC BY-NC 4.0 license.

Keywords

clindamycin, matrix, metronidazole, regenerative endodontics, revascularization, scaffold

Department

Endodontics

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Date Posted: 23 July 2018

This document has been peer reviewed.