This review summarized the powder jet deposition (PJD) method used to create a thick hydroxyapatite (HAp) film on a human tooth surface. The PJD method is a technology for creating ceramic films on ceramic substrates in which fine particles of ceramic were accelerated and the only deposition process that could be used in the room temperature and room pressure. The HAp film created in previ-ous studies showed that excellent microstructure and mechanical properties. The possibility of making a new interface between the tooth and biomaterials using the PJD method was indicated.
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