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双侧下颌升支矢状劈开截骨术后五种内固定方法的强度比较：一项研究。

Comparison of strengths of five internal fixation methods used after bilateral sagittal split ramus osteotomy: An study.

作者信息

Sarkarat Farzin, Ahmady Atiye, Farahmand Farzam, Fateh Ali, Kahali Roozbeh, Nourani Amir, Rakhshan Vahid

机构信息

Department of Oral and Maxillofacial Surgery, Tehran, Iran.

Craniomaxillofacial Research Center, Islamic Azad University of Medical Sciences, Tehran, Iran.

出版信息

Dent Res J (Isfahan). 2020 Aug 14;17(4):258-265. eCollection 2020 Jul-Aug.

PMID:33282151
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7688040/
Abstract

BACKGROUND

Results on the strength and displacement of internal fixation methods for bilateral sagittal split ramus osteotomy are controversial, and some designs have not been adequately studied. Therefore, this study was conducted to compare techniques using bicortical or monocortical screws.

MATERIALS AND METHODS

In this study, 35 sheep hemi-mandibles were randomly assigned to five groups of seven each: fixation using (1) a 13 × 2 screw, (2) two 13 × 2 screws (arranged vertically), (3) three 13 × 2 screws, (4) 1 plate with 4 holes and four monocortical screws, and (5) a Y-shaped plate and five monocortical screws. Specimens underwent vertical forces until failure. Breakage forces and displacements of groups were recorded and compared statistically. Using one-way analysis of variance (ANOVA) with a Tukey's post hoc test and Kruskal-Wallis test. Level of significance was predetermined as 0.05.

RESULTS

Strengths of Groups 1-5 were, respectively, 14.43 ± 4.35, 28.00 ± 8.89, 28.29 ± 8.01, 29.43 ± 8.24, and 61.29 ± 12.38 N, respectively ( = 0.000, analysis of variance). The corresponding displacement extents were 7.98 ± 0.04, 7.85 ± 0.26, 8.00 ± 0.00, 7.35 ± 1.73, and 6.79 ± 2.03 mm ( = 0.298, Kruskal-Wallis test).

CONCLUSION

Use of a single bicortical screw is the weakest method, while Y-shaped plates might provide the highest strength. Using two or three bicortical screws or 4-hole plates might deliver similar strengths.

摘要

背景

双侧矢状劈开下颌支截骨术内固定方法的强度和位移结果存在争议，且一些设计尚未得到充分研究。因此，本研究旨在比较使用双皮质螺钉或单皮质螺钉的技术。

材料与方法

在本研究中，35个绵羊半下颌骨被随机分为五组，每组7个：使用（1）一枚13×2螺钉固定，（2）两枚13×2螺钉（垂直排列）固定，（3）三枚13×2螺钉固定，（4）一块4孔钢板和四枚单皮质螺钉固定，以及（5）一块Y形钢板和五枚单皮质螺钉固定。对标本施加垂直力直至失效。记录各组的断裂力和位移，并进行统计学比较。采用单因素方差分析（ANOVA）及Tukey事后检验和Kruskal-Wallis检验。显著性水平预先设定为0.05。

结果

第1 - 5组的强度分别为14.43±4.35、28.00±8.89、28.29±8.01、29.43±8.24和61.29±12.38 N（方差分析，P = 0.000）。相应的位移程度分别为7.98±0.04、7.85±0.26、8.00±0.00、7.35±1.73和6.79±2.03 mm（Kruskal-Wallis检验，P = 0.298）。

结论

使用单枚双皮质螺钉是最弱的方法，而Y形钢板可能提供最高的强度。使用两枚或三枚双皮质螺钉或4孔钢板可能提供相似的强度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/79f82c6e7b29/DRJ-17-258-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/84aecd3d0f74/DRJ-17-258-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/61f2a3c148da/DRJ-17-258-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/90f005b3dd62/DRJ-17-258-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/585676ec5a79/DRJ-17-258-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/7a0d20be1d0e/DRJ-17-258-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/1e6d9cee252d/DRJ-17-258-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/81deda437152/DRJ-17-258-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/79f82c6e7b29/DRJ-17-258-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/84aecd3d0f74/DRJ-17-258-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/61f2a3c148da/DRJ-17-258-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/90f005b3dd62/DRJ-17-258-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/585676ec5a79/DRJ-17-258-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/7a0d20be1d0e/DRJ-17-258-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/1e6d9cee252d/DRJ-17-258-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/81deda437152/DRJ-17-258-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1719/7688040/79f82c6e7b29/DRJ-17-258-g008.jpg

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