Abstract
We manufactured three kinds of natural cellulose fiber sheets (Bacterial cellulose fibers sheets (BC-G, BC-H) of which thicknesses are 1 and 2.5 mm before the press and wood cellulose fiber sheet (WC)) for using as a row material of the dental paper point. The mechanical, moisture adsorption-desorption, expansion, and sustained-release properties of the above sheets were compared with them of the sheet (PP) obtained by flattening a ready-made paper point for dental treatment. Each tensile strength of the BC-G, BC-H, and WC was approximately 1.3, 2.2, and 2.6 times higher than the PP. Both equilibrium moisture contents of the BC-G and WC in the adsorption process were approximately 1.3 times higher than the PP. The expansion ratio of the BC-G, BC-H, and WC were about from one order to two orders of magnitude higher than in the PP and exceeded 100%. The WC was the best performance on the sustained-release.
