PROBLEM TO BE SOLVED: To provide a material applicable to an implant material and a thin film material for dental treatment.SOLUTION: A material of the invention contains crystalline hydroxyapatite particles made from a peeled film having a uniform thickness and an aspect ratio of 20-400. The material has a sufficient contact area with an object giving good affinity and an excellent packing factor since it contains the hydroxyapatite particles having a scale-like shape of a constant film thickness and a high aspect ratio. The material is thus applicable to an implant material and a thin film material for dental treatment.SELECTED DRAWING: Figure 1
