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Preparation and characterization of injectable SMS hydrogel system. A) Digital photograph of the morphology of wet and freeze-dried composite SMS hydrogels with different amounts of VC and MBG. The composite hydrogel with 2% MBG and 1.5% VC (purple circle: SMS hydrogel) was chosen for further study. B) Digital photographs of the SMS hydrogel injected via a fine needle. C) Evaluation of the shapeability of SMS hydrogel in different modulus.
