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KMID : 0363020120420020059
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Journal of Korean Academy of Periodontology
2012 Volume.42 No. 2 p.59 ~ p.63
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Surface characteristics of a novel hydroxyapatite-coated dental implant
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Jung Ui-Won
Hwang Ji-Wan
Choi Da-Yae
Hu Kyung-Seok
Kwon Mi-Kyung
Choi Seong-Ho
Kim Hee-Jin
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Abstract
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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.
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KEYWORD
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Biocompatible coated materials , Dental implants , Hydroxyapatites , Titanium
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