Transformation of 3-D printing gypsum model to HA by treating in ammonium phosphate solution (Part 2) -Effect of HA powder on the transformation to HA-

Abstract

A rapid prototyping technique, 3-D printing can fabricate any shape of model by gypsum. From our previous experiment, gypsum sample fabricated by 3-D printing could be transformed easier than that of plaster of Paris to hydroxyapatite when treated in ammonium phosphate solution. However, the time consumes to transform the specimen with 4-mm thickness, is quite long. In the present study, the samples of the mixture of 3-D printing and HA are fabricated and treated in 1 M ammonium phosphate solution at 80 C. The transformation to HA of surfaces and the inside parts of the specimens are investigated.