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KMID : 0361920190490040205
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Korean Journal of Orthodontics
2019 Volume.49 No. 4 p.205 ~ p.213
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Comparison of tooth movement and biological response in corticotomy and micro-osteoperforation in rabbits
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Kim Jung-Han
Kook Yoon-Ah
Bayome Mohamed
Park Jae-Hyun
Lee Won
Choi Ho-Jae
Abbas Noha H.
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Abstract
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Objective: The aim of this study was to evaluate the amount of tooth movement and histologic changes with different corticotomy designs and micro-osteoperforation in rabbits.
Methods: The sample consisted of 24 rabbits divided into three experimental groups (triangular corticotomy [TC] and indentation corticotomy [IC] with flap, and flapless micro-osteoperforations [MP]) and a control. A traction force of 100 cN was applied by connecting the first premolars to the incisors. The amount of tooth movement was measured. Kruskal?Wallis test was used to assess differences in tooth movement between the groups. Micro-computed tomography, hematoxylin and eosin staining, and tartrate-resistant acidic phosphatase (TRAP) analysis were performed. Analysis of variance was applied to assess differences in TRAP-positive osteoclast count between the groups.
Results: The amount of tooth movement increased by 46.5% and 32.0% in the IC and MP groups, respectively, while the bone fraction analysis showed 69.7% and 8.5% less mineralization compared to the control. There were no significant intergroup differences in the number of TRAP-positive osteoclasts.
Conclusions: The micro-osteoperforation group showed no significant differences in the amount of tooth movement compared to the corticotomy groups, nor in the TRAP-positive osteoclast count compared to both corticotomy groups and control.
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KEYWORD
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Histology, Corticotomy, Tooth movement, Root resorption
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