Abstract
Traditional methods of bone defect repair include autografts, allografts, surgical reconstruction, and metal implants that have several disadvantages such as donor site morbidity, rejection, risk of disease transmission, and repetitive surgery. Biomaterial-based bone reconstructions can, therefore, be an efficient alternative due to the inherent properties of the materials. Chitosan (CS), the deacetylated form of chitin, is a biopolymer having a wide array of applicability in regenerative tissue applications owing to its biocompatible, in vitro degradative and bioresorbable nature. Extensive studies are being carried out using CS to augment the properties of the already existing methods and to also improve the applicability of CS-based biocomposites in bone tissue repair. In this review, the suitability of CS as a surface modifier has been discussed in detail for the already existing implants, surface modifications of CS-based natural biocomposites for bone tissue regeneration, and the wide range of techniques that can introduce these modifications. CS, being a natural polymer, possesses advantageous properties including surface modifier that makes it a suitable candidate for bone regeneration, and further research to investigate its osteogenic potential in vivo along with the molecular and signaling mechanisms involved in bone regeneration can aid in expanding its applicability in clinical trials.
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