Review of extended-release drug delivery systems for non-surgical treatment of inflammatory periodontal diseases

Relevance. The onset of periodontal pathogen resistance to systemic antibiotics revealed a new direction in periodontics. The characteristics of local drug delivery systems allow for a prolonged impact on periodontal pocket microbiota.Materials and methods. The non-interventional study was carried out by an analytical review of Russian and international scientific publications of independent clinical and laboratory research databases PubMed, ResearchGate, ScienceDirect, and eLIBRARY.RU for the last decade. The search was performed using the keywords: "periochip", "periodontal treatment", "the matrix", "tissue engineering", and "bioactive cryogels". The review included randomized controlled studies, controlled clinical trials, prospective and retrospective comparative cohort studies of drug delivery systems and systematic reviews.Results. In contrast to systemic drug administration, biodegradable local drug delivery systems provide long-lasting and effective treatment at the lesion site at much lower doses and in a shorter period of time. The prolonged drug activity time combined with non-surgical treatment of inflammatory periodontal diseases results in faster soft tissue regeneration. Gels, foams, fibres, bioactive cryogels, micro- and nanoparticles, and chips may be biodegradable matrices for the extended-release drug delivery system. The basic polymer for all these forms can be of natural origin (proteins, collagen), semi-synthetic (cellulose derivatives) or synthetic.Conclusion. Films, chips and bioactive cryogel are nowadays more common forms. Due to its unique structure, the bioactive drug cryogel can serve as a controlled and multifunctional system for drug delivery to the periodontal tissues, which determines its importance in periodontics and high interest f or further research.