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KMID : 0361920130430030120
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Korean Journal of Orthodontics
2013 Volume.43 No. 3 p.120 ~ p.126
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Biologic stability of plasma ion-implanted miniscrews
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Cho Young-Chae
Cha Jung-Yul
Hwang Chung-Ju
Park Young-Chel
Jung Han-Sung
Yu Hyung-Seog
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Abstract
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Objective: To gain basic information regarding the biologic stability of plasma ion-implanted miniscrews and their potential clinical applications. Methods: Sixteen plasma ion-implanted and 16 sandblasted and acid-etched (SLA) miniscrews were bilaterally inserted in the mandibles of 4 bea-gles (2 miniscrews of each type per quadrant). Then, 250 - 300 gm of force from Ni-Ti coil springs was applied for 2 different periods: 12 weeks on one side and 3 weeks contralaterally. Thereafter, the animals were sacri-ficed and mandibular specimens including the miniscrews were collected. The insertion torque and mobility were compared between the groups. The bone?implant contact and bone volume ratio were calculated within 800 mm of the miniscrews and compared between the loading periods. The number of osteoblasts was also quantified. The measurements were ex-pressed as percentages and analyzed by independent t-tests (p < 0.05). Results: No significant differences in any of the analyzed parameters were noted between the groups. Conclusions: The preliminary findings indicate that plasma ion-implanted miniscrews have similar biologic characteristics to SLA miniscrews in terms of insertion torque, mobility, bone?implant contact rate, and bone volume rate.
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KEYWORD
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Orthodontic mini-implant, Surface treatment, Histology, Stability
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