Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
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Surface characteristics of a novel hydroxyapatite-coated dental implant

  • Jung, Ui-Won (Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry) ;
  • Hwang, Ji-Wan (Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry) ;
  • Choi, Da-Yae (Division in Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Center, Yonsei University College of Dentistry) ;
  • Hu, Kyung-Seok (Division in Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Center, Yonsei University College of Dentistry) ;
  • Kwon, Mi-Kyung (Research Institute of Dentis Co.) ;
  • Choi, Seong-Ho (Department of Periodontology, Research Institute for Periodontal Regeneration, Yonsei University College of Dentistry) ;
  • Kim, Hee-Jin (Division in Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Center, Yonsei University College of Dentistry)
  • Received : 2012.02.10
  • Accepted : 2012.03.20
  • Published : 2012.04.30
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Abstract

Purpose: This study evaluated the surface characteristics and bond strength produced using a novel technique for coating hydroxyapatite (HA) onto titanium implants. Methods: HA was coated on the titanium implant surface using a super-high-speed (SHS) blasting method with highly purified HA. The coating was performed at a low temperature, unlike conventional HA coating methods. Coating thickness was measured. The novel HA-coated disc was fabricated. X-ray diffraction analysis was performed directly on the disc to evaluate crystallinity. Four novel HA-coated discs and four resorbable blast medium (RBM) discs were prepared. Their surface roughnesses and areas were measured. Five puretitanium, RBM-treated, and novel HA-coated discs were prepared. Contact angle was measured. Two-way analysis of variance and the post-hoc Scheffe's test were used to analyze differences between the groups, with those with a probability of P<0.05 considered to be statistically significant. To evaluate exfoliation of the coating layer, 7 sites on the mandibles from 7 mongrel dogs were used. Other sites were used for another research project. In total, seven novel HA-coated implants were placed 2 months after extraction of premolars according to the manufacturer's instructions. The dogs were sacrificed 8 weeks after implant surgery. Implants were removed using a ratchet driver. The surface of the retrieved implants was evaluated microscopically. Results: A uniform HA coating layer was formed on the titanium implants with no deformation of the RBM titanium surface microtexture when an SHS blasting method was used. Conclusions: These HA-coated implants exhibited increased roughness, crystallinity, and wettability when compared with RBM implants.

Keywords

References

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