I2

Figure 1 shows the bioactivity of bioglass of different formulations. Three bioglass formulations represented by circle, triangle and star are located at In=0. 5 and 10, respectively. a) Explain what Is represents and how it is calculated. b) It is known that bloglass X is capable of integrating with both hard bone and soft tissue, which formulation represents X? c) if it takes 20 days for the bioglass formulation represented by the triangle to have 50% of its surface integrated to the native bone, based on Figure 1, estimate the time needed to achieve 50% surface integration between bone and implanted bioglass X. SIO D d) Please briefly explain the process of the controlled crystallization needed to fabricate glass-ceramics? SIO? 10 CI D CaO ANSO