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External root resorption following avulsion injury is a complex process wherein differentiation of macrophages (Mϕ) to multinucleated osteoclasts is temporally regulated by resident periodontal fibroblasts (PDLF). The current study aims to assess the effect of engineered bioactive chitosan nanoparticles (CSNP), sustained released dexamethasone conjugated CSNP (CS-DEX) and CSNP functionalized with photosensitizer Rose Bengal (CSRB) for application in root resorption using an in-vitro PDLF-Mϕ direct coculture model and in-vivo delayed reimplantation model.
Siddappa et al. (Sat,) studied this question.
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