Differences in Swelling and Water Content Percentage Between Non-Crosslinked and 0.25% Glutaraldehyde-Crosslinked Chitosan–Gelatin–Carbonate Hydroxyapatite Composite Scaffolds Togi Ozora Sihaloho¹, Devi Rianti²*, Titien Hary Agustantina² Abstract Background: Scaffolds are three-dimensional structures that serve as a site for cell attachment, proliferation, and differentiation in bone tissue engineering. The combination of chitosan, gelatin,