Functionality testing of an innovative biomechanically optimized and surface-modified orthodontic mini-screw-a comparative study.

IF 1.3 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Kathrin Duske, Billan Turan, Cornelia Prinz, Jan Hendrik Lenz, Franka Stahl, Mareike Warkentin
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引用次数: 0

Abstract

Purpose: The failure rate of orthodontic mini-screws depends strongly on primary stability and, thus, on insertion torque. Further improvement regarding the failure rate might be achieved by modifying the surface coating. Therefore, the aim of the study was to investigate the stability of a newly designed and surface-modified orthodontic mini-screw in beagle dogs.

Methods: Newly designed mini-screws coated either with DOTIZE® or DOTIZE®-copper (DOT GmbH, Rostock, Germany; each: n = 24) were inserted in the mandibles of eight beagle dogs for a duration of 8 months. Insertion and removal torque were measured. These data were compared to values generated by using the artificial bone material Sawbones® (Sawbones Europe AB, Malmö, Sweden). Experiments with and without torque limitation (each: n = 5) were run. The bone-to-implant contact rate and the amount of bone between the threads were examined. Statistical significance was set at P < 0.05.

Results: The success rates of the in vivo study reached high levels with 95.3% for the DOTIZE-coated and 90.5% for the DOTIZE-copper-coated screws, whereas the insertion and removal torque did not differ between the coatings. During insertion, a torque limitation of 20 Ncm was necessary to ensure that the recommended limit was not exceeded. The insertion in Sawbones without torque limitation revealed a significantly higher torque compared to torque-limited insertion (18.2 ± 1.3 Ncm, 23.6 ± 1.3 Ncm). Bending occurred (n = 5) in the thread-free part of the mini-screw.

Conclusions: Surface coating might be able to improve the performance of orthodontic mini-screws. The study showed high success rates and stable mini-screws until the end of observation. Further investigations are necessary.

Abstract Image

创新型生物力学优化和表面改性正畸微型螺钉的功能测试--一项比较研究。
目的:正畸微型螺钉的失效率在很大程度上取决于初级稳定性,因此也取决于插入扭矩。通过改变表面涂层可以进一步提高失效率。因此,本研究的目的是调查新设计的表面改性正畸微型螺钉在小猎犬体内的稳定性:方法:将涂有 DOTIZE® 或 DOTIZE®-copper 涂层的新设计微型螺钉(DOT GmbH,德国罗斯托克;每种:n = 24)插入八只小猎犬的下颌,为期 8 个月。对插入和取出扭矩进行了测量。这些数据与使用人工骨材料 Sawbones® (Sawbones Europe AB,瑞典马尔默)生成的数值进行了比较。分别进行了有扭矩限制和无扭矩限制的实验(各:n = 5)。对骨与种植体的接触率以及螺纹之间的骨量进行了检测。统计显著性设定为 P 结果:体内研究的成功率很高,涂有 DOTIZE 涂层的螺钉为 95.3%,涂有 DOTIZE 铜涂层的螺钉为 90.5%。在插入过程中,有必要将扭矩限制在 20 Ncm,以确保不超过建议的极限值。在不限制扭矩的情况下插入锯骨时,扭矩明显高于限制扭矩的情况(18.2 ± 1.3 Ncm,23.6 ± 1.3 Ncm)。微型螺钉的无螺纹部分发生了弯曲(n = 5):结论:表面涂层可以改善正畸微型螺钉的性能。研究显示,直到观察结束,微型螺钉的成功率和稳定性都很高。有必要进行进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.90
自引率
0.00%
发文量
64
审稿时长
>12 weeks
期刊介绍: The Journal of Orofacial Orthopedics provides orthodontists and dentists who are also actively interested in orthodontics, whether in university clinics or private practice, with highly authoritative and up-to-date information based on experimental and clinical research. The journal is one of the leading publications for the promulgation of the results of original work both in the areas of scientific and clinical orthodontics and related areas. All articles undergo peer review before publication. The German Society of Orthodontics (DGKFO) also publishes in the journal important communications, statements and announcements.
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