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KMID : 0361920080380050328
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Korean Journal of Orthodontics
2008 Volume.38 No. 5 p.328 ~ p.336
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Effects of surface treatment on the osseointegration potential of orthodontic mini-implant
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Jeon Mi-sun
Kang Yoon-Goo
Mo Sung-Seo
Lee Keun-Hye
Kook Yoon-Ah
Kim Seong-Hun
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Abstract
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Objective: The purpose of this study was to compare the torque resistance to removal of sandblasted large grit and acid etched (SLA) surface treated orthodontic mini-implants and smooth surface orthodontic mini-implants as well as performing histologic observations.
Methods: Two groups of custom screw shaped orthodontic mini-implants (C-implant, 1.8 mm outer diameter × 9.5 mm length, Cimplant, Seoul, Korea) were designated. 22 SLA treated C-implants (SLA group) and 22 machined surface C-implants (machined group) were placed in the tibia metaphysis of 11 adult New Zealand white rabbits. Following a 6-week healing period, the rabbits were sacrificed. Subsequently, the C-implants were removed under reverse torque rotation with a digital torque measuring device and independent t-test was performed. Selected tissues were prepared for histologic observation.
Results: The SLA group presented a higher mean removal torque value (6.286 Ncm) than the machined group (4.491 Ncm) which was statistically significant (p ＜ 0.005). Histologic observation revealed a trend of more new bone formation in contact with the screw surface in the SLA group than the smooth group.
Conclusions: The results of this study suggested that SLA surface treatment can enhance the osseintegration potential for C-orthodontic mini-implants. (Korean J Orthod 2008;38(5):328-336)
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KEYWORD
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Surface treatment, Removal torque, Osseointegration, Skeletal anchorage
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