The study of surface properties of SLM 3D printing titanium mesh coating by polyurethane

doi:10.12337/zgkqzzxzz.2022.02.004

Abstract

Abstract: Objective The surface of laser selective melting was treated by the polyurethane electrophoretic coating method. The better effects of titanium surface pretreatment technologies should include the following aspects, the surface is flat, few metal-dust, and the peaks of the blasted surface were found on the surface. Methods Experimental group, Group A: Normal processing; Group B1: SiO₂ sandblasting; Group B2: Al₂O₃ sandblasting; Group C1: SiO₂ sandblasting and acid etching; Group C2: Al₂O₃ sandblasting and acid etching; Group D1: Polyurethane coating (40V); Group D2: Polyurethane coating (60V); Group D3: Polyurethane coating (80V). The surface morphology of each specimen was observed. And its roughness, contact Angle, coating thickness were tested by relevant methods. Results The effect of the polyurethane coating group was significantly better than other surface treatment groups (P<0.001). There is nearly no metal powder on the surface of polyurethane coating with a thickness of 15-20 μm, the quantity of exposed peaks of the blasted surface is decreased. Conclusion The method of polyurethane electrophoretic coating could make the surface of SLM 3D printing titanium mesh more flat and hydrophobic, nearly a few metal-dust and foreign matter were found on the surface, and no Isocyanate monomer was present in the materials. It is expected to reduce the stimulation of gingival soft tissue and prevent the postoperative infection caused by SLM 3D printed titanium mesh. It’s safer to Implant into the alveolar bone.

Key words: Sandblasting, Acid etching, Polyurethane

Han Zekui, Zhang Liang, Xie Fei, Zheng Xiaoxiao, Chen Yingying, Wang Xinyu. The study of surface properties of SLM 3D printing titanium mesh coating by polyurethane[J]. Chinese Journal of Oral Implantology, 2022, 27(1): 16-21.

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