The injectable polymers work through a multi-step process that mimics the natural bone healing process. They offer a minimally invasive technique for bone repair, in which material is injected into the defect site and works by forming a supportive scaffold for cell growth. Afterward, polymer degrades timely to be replaced by new forming bone tissue. Additionally, certain polymers could transfer growth factors for improved healing and encourage cell growth on their surface, a process known as osteoconduction. In certain cases, they even promote vascularization, the formation of new blood vessels, which supplies essential nutrients for a successful repair. This mechanism is shown in Figure and explained in details with following steps: