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Experimental Study of Osseointegration and Stability of Intentionally Exposed Hydroxyapatite Coating Implants  

Jeong, Kyung-In (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Kim, Su-Gwan (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Moon, Seong-Yong (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Oh, Ji-Su (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Jo, Ji-Ho (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Lim, Hyoung-Sup (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Kim, Jeong-Sun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University)
Lim, Sung-Chul (Department of Pathology, School of Medicine, Chosun University)
Jeong, Mi-Ae (Department of Dental Hygiene, Kangwon National University)
Publication Information
Maxillofacial Plastic and Reconstructive Surgery / v.34, no.1, 2012 , pp. 12-16 More about this Journal
Abstract
Purpose: The purpose of this study is to evaluate the effect of exposure of hydroxyapatite coating on the amount of bone formation and stability in the dogs. Methods: In this study, hydroxyapatite coated implants (HAPTITE) was placed over the femur bone surface of four dogs about 1 mm. The experimental group was divided into 4 weeks group of 8 implants and 8 weeks group of 8 implants, and then they were sacrificed. The stability of implants was evaluated twice with Osstell$^{TM}$ mentor (Osstell AB, Goteborg, Sweden) at right after placement and sacrifice. The amount of bone formation was evaluated through histomorphometric examination. Results: The stability of implants was in normal range, and tended to increase as time goes by. Mean percentages of new bone formation rates were $90.5{\pm}6.6$ at uppermost 1 mm bone level adjacent to soft tissues (level 1) and $92.9{\pm}4.1$ at next 1 mm bone level (level 2) in 4 weeks group, $90.1{\pm}11.5$ at level 1 and $95.9{\pm}2.3$ at level 2 in 8 weeks group. Mean percentages of bone-implant contact rates were $85.1{\pm}10.8$ at level 1 and $88.1{\pm}13.8$ at level 2 in 4 weeks group, $88.5{\pm}14.4$ at level 1 and $95.3{\pm}3.1$ at level 2 in 8 weeks group. There was no statistically significant difference of new bone formation rate and bone-implant contact rate between uppermost 1 mm bone level adjacent to soft tissues and next 1 mm bone level. However, there was no significant difference in bone formation between 4 and 8 weeks groups. Conclusion: These results suggested that exposed hydroxyapatite coated implants to soft tissue showed favorable bone formation and implant stability.
Keywords
Dental implants; Coated materials; Hydroxyapatite;
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Times Cited By KSCI : 1  (Citation Analysis)
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