Thermosensitive hydrogel doped with osteoconductive fillers for the treatment of periodontitis periapicalis chronica : from synthesis to clinical trial

Herein, a chitosan-based thermosensitive hydrogel (CH) containing hydroxyapatite (HAp), poly(lactic acid) (PLDLLA) or their mixture is proposed as an innovative, biomimetic composition with antimicrobial and bone-forming properties for guided bone regeneration. The modified hydrogels were synthesize...

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Published in:Biomaterials science 2024-11, Vol.12 (23), p.6063-6081
Main Authors: Dobrzyńska-Mizera, Monika, Knitter, Monika, Kamińska, Marta, Szymanowska, Daria, Sobczyk-Guzenda, Anna, Różańska, Sylwia, Różański, Jacek, Mikulski, Michał, Muzalewska, Małgorzata, Wyleżoł, Marek, Smuga-Kogut, Małgorzata, Modrzejewska, Zofia, Di Lorenzo, Maria Laura
Format: Article
Language:English
Subjects:
Biomedical materials
Chitosan
Clinical trials
Gum disease
Health services
Hydrogels
Hydroxyapatite
Mechanical properties
Polylactic acid
Radiation crosslinking
Radiation dosage
Regeneration (physiology)
Rheological properties
Rheology
Toxicity testing
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Summary:Herein, a chitosan-based thermosensitive hydrogel (CH) containing hydroxyapatite (HAp), poly(lactic acid) (PLDLLA) or their mixture is proposed as an innovative, biomimetic composition with antimicrobial and bone-forming properties for guided bone regeneration. The modified hydrogels were synthesized and characterized to verify their suitability for the treatment of . Compared to the unmodified hydrogel, both CH_HAp and CH_PLDLLA revealed improved mechanical properties, as evidenced by rotational rheology. FTIR analysis proved that no chemical interplay existed between the components. All the tested samples displayed no cytotoxicity against osteoblast-like cell culture and confirmed antimicrobial features, both crucial from an application perspective. Radiation sterilization dosage was tailored for the tested samples to maintain sterility for a minimum of 8 weeks of storage and limit crosslinking of the samples. Finally, the hydrogel was used in a clinical trial to treat a patient with chronic inflammation of periapical tissues in teeth 26 and 27. The medical procedure proved the safety, nontoxicity, non-allergenicity, and, most importantly, bone-forming properties of the hydrogel formulation. The kinetics of new bone formation was analyzed in-depth using graphical cross-sections of anatomical structures obtained from pre- and post-operative CBCT scans.
ISSN:2047-4830
2047-4849
2047-4849
DOI:10.1039/d4bm00927d