2.2. Preparation of composite hydrogels

Initially, different proportions of HAMA, GelMA, and nHAP powder particles were added to double-distilled water and magnetically stirred for 1 ​h at 60 ​°C under water bath heating conditions avoiding light. Table 1 shows the composition and abbreviations of the hydrogels in this study. Then, the sufficiently stirred hydrogel solution was subject to ultrasonic stirring whereby the nHAP particles were homogeneously separated within the hydrogel solution, followed by the addition of 0.1% v/v LAP for 2 ​min under 405 ​nm wavelength illumination for photocrosslinking.

The composition of different composite hydrogel.