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骨质量影响正畸微螺钉的稳定性。

Bone quality affects stability of orthodontic miniscrews.

机构信息

Master Program for Biomedical Engineering, China Medical University, Taichung, 404, Taiwan.

Department of Biomedical Engineering, Hungkuang University, Taichung, 433, Taiwan.

出版信息

Sci Rep. 2022 Feb 18;12(1):2849. doi: 10.1038/s41598-022-06851-y.

DOI:10.1038/s41598-022-06851-y
PMID:35181736
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8857199/
Abstract

The objective of this study was to evaluate the effect of bone-miniscrew contact percentage (BMC%) and bone quality and quantity on orthodontic miniscrew stability and the maximum insertion torque value (ITV). Orthodontic miniscrews of five different dimensions and several bovine iliac bone specimens were used in the evaluation. Miniscrews of each dimension group were inserted into 20 positions in bovine iliac bone specimens. The experiment was divided into three parts: (1) Bone quality and quantity were evaluated using cone-beam computed tomography (CBCT) and microcomputed tomography. (2) The 3D BMC% was calculated. (3) The ITVs during miniscrew insertion were recorded to evaluate the stability of the orthodontic miniscrews. The results indicated that longer and thicker miniscrews enabled higher ITVs. CBCT was used to accurately measure cortical bone thickness (r = 0.939, P < 0.05) and to predict the bone volume fraction of cancellous bone (r = 0.752, P < 0.05). BMC% was significantly influenced by miniscrew length. The contribution of cortical bone thickness to the ITV is greater than that of cancellous bone structure, and the contribution of cortical bone thickness to BMC% is greater than that of cancellous bone structure. Finally, the higher is BMC%, the greater is the ITV. This study concludes that use of CBCT may predict the mechanical stability of orthodontic miniscrews.

摘要

本研究旨在评估骨-微螺钉接触百分比（BMC%）和骨质量与数量对正畸微螺钉稳定性和最大植入扭矩值（ITV）的影响。评估中使用了五种不同尺寸的正畸微螺钉和几个牛髂骨标本。每个尺寸组的微螺钉都被插入到 20 个牛髂骨标本的位置中。实验分为三个部分：（1）使用锥形束 CT（CBCT）和微计算机断层扫描（micro-CT）评估骨质量和数量。（2）计算 3D BMC%。（3）记录微螺钉插入过程中的 ITV，以评估正畸微螺钉的稳定性。结果表明，更长、更厚的微螺钉可实现更高的 ITV。CBCT 可用于准确测量皮质骨厚度（r=0.939，P<0.05），并预测松质骨的骨体积分数（r=0.752，P<0.05）。BMC%受微螺钉长度的显著影响。皮质骨厚度对 ITV 的贡献大于松质骨结构，皮质骨厚度对 BMC%的贡献大于松质骨结构。最后，BMC%越高，ITV 越大。本研究得出结论，使用 CBCT 可能预测正畸微螺钉的机械稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/63662030d543/41598_2022_6851_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/31e22a75dcd7/41598_2022_6851_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/2ddbdac5ca05/41598_2022_6851_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/80b3cf6ac9d8/41598_2022_6851_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/9e4e02a3a685/41598_2022_6851_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/db97fdad7e9a/41598_2022_6851_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/2c8ac8dfa43e/41598_2022_6851_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/d7d5e2a889f5/41598_2022_6851_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/63662030d543/41598_2022_6851_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/31e22a75dcd7/41598_2022_6851_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/2ddbdac5ca05/41598_2022_6851_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/80b3cf6ac9d8/41598_2022_6851_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/9e4e02a3a685/41598_2022_6851_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/db97fdad7e9a/41598_2022_6851_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/2c8ac8dfa43e/41598_2022_6851_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/d7d5e2a889f5/41598_2022_6851_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/507b/8857199/63662030d543/41598_2022_6851_Fig8_HTML.jpg

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