“…Numerous studies have shown that chitosan and chitin can be used in a variety of applications in tissue engineering (Yilgor et al., 2009 ; Liu et al., 2016 ; Pangon et al., 2016 ; Islam et al., 2017 ; Ahsan et al., 2018 ). They can be designed into a variety of structures such as gels, membranes nanofibers, nanoparticle and sponges (Singh et al., 2017 ; Smirnova et al., 2019 ; Zubillaga et al., 2020 ). In combination with properties such as its good biocompatibility, biodegradability, nontoxic, anti-inflammatory, adhesion, antibacterial and nerve protection, chitosan can be made into a suitable candidate for growth factors delivery (Rajam et al., 2011 ).…”