Biological response to lyophilized demineralized dentin matrix implanted in the subcutaneous tissues of rats.

Autor:	Copelli FA; Postgraduate Program in Dentistry, Federal University of Paraná, Curitiba, Paraná, Brazil., Lima AAS; Department of Stomatology, Federal University of Paraná, Curitiba, Paraná, Brazil., Santos CCO; Department of Restorative Dentistry, Federal University of Paraná, Curitiba, Paraná, Brazil., Carneiro E; Department of Endodontics, Pontifical Catholic University of Paraná, Curitiba, Paraná, Brazil., Cavenago BC; Postgraduate Program in Dentistry, Federal University of Paraná, Curitiba, Paraná, Brazil.
Jazyk:	angličtina
Zdroj:	The Saudi dental journal [Saudi Dent J] 2021 Nov; Vol. 33 (7), pp. 441-447. Date of Electronic Publication: 2020 Dec 15.
DOI:	10.1016/j.sdentj.2020.12.005
Abstrakt:	Aim: Lyophilized demineralized dentin matrix (LDDM) consists of a type 1 collagen complex matrix containing growth factors and no mineral crystals. Although the efficacy of LDDM for bone grafting is well known, there is limited evidence on the biological response to human lyophilized DDM. Therefore, the aim of this study was to evaluate the biological response of subcutaneous tissues in rats to powdered LDDM, mineral trioxide aggregate (MTA), and Biodentine implanted using polyethylene tubes. Methods: Forty Wistar rats were divided into four groups (n = 10 each) depending on the experimental time intervals and were placed in polyethylene tubes containing LDDM, MTA, biodentine, and one empty control. After 3, 7, 15, and 30 observation days, the animals were sacrificed and quantitative and qualitative analysis of the subcutaneous tissue samples was carried out. The intensity of the inflammatory response was scored from 0 (no response) to 3 (severe response), and the data were statistically analyzed using ANOVA and Bonferroni tests (p < 0.05). Results: All groups exhibited moderate inflammation after 3 and 7 days of observation, with presence of inflammatory infiltrate predominantly consisting of macrophages and angioblastic proliferation being observed. After 15 observation days, the control group exhibited mild inflammation and a predominance of fibroblasts, and this differed significantly from the remaining cement groups that exhibited moderate inflammation. After 30 days of observation, all groups exhibited a mild inflammatory response, predominance of fibroblasts, and a greater amount of collagen fibers. Conclusion: Within the limitations of this study, it can be concluded that LDDM exhibited an acceptable biological response similar to MTA and Biodentine in the subcutaneous tissues of rats. Competing Interests: The authors declared that there is no conflict of interest. (© 2020 The Authors.)
Databáze:	MEDLINE
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