与标准螺钉相比,多孔螺纹钛植入螺钉具有更高的插入扭矩。

IF 1.4 Q3 ORTHOPEDICS
Andrew P Collins, Stephen J Wallace, Graham J DeKeyser, David W Polly, Reza Firoozabadi
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引用次数: 0

摘要

目的:后骨盆环螺钉脱出和固定丢失可能是由于螺钉购买不当造成的,这在老年骨盆环损伤中很常见,其中松质骨通常是骨质疏松的。为了减少螺钉退出,越来越多地使用多孔螺纹钛植入物(PTTI)螺钉进行骨盆后固定,而不是标准的空心螺纹螺钉。本研究的目的是评估PTTI螺钉与标准空心螺钉的插入扭矩,因为关于螺钉之间生物力学固定剖面的证据有限。方法:15名骨科创伤外科医生将螺钉插入经验证的骨质疏松松质骨替代物。每位外科医生在三种不同的情况下测量螺钉置入过程中的插入扭矩:(1)将标准7.3 mm螺钉置入新骨模型,(2)将PTTI螺钉置入新骨模型,以及(3)将PTTI螺钉通过先前放置的7.3 mm螺钉孔置入,并将其取出(救援螺钉)。结果:7.3 mm螺钉的平均插入扭矩为0.358±0.223 Nm,最大插入扭矩为0.627±0.365 Nm。PTTI螺钉的平均插入扭矩为0.929±0.551 Nm,是7.3 mm螺钉的2.59倍(p < 0.001),最大插入扭矩为1.877±0.671 Nm,是标准螺钉的2.99倍(p < 0.001)。将PTTI螺钉置入先前7.3 mm螺钉孔(救援)时,PTTI螺钉产生的平均插入扭矩为0.711±0.405,仍是7.3 mm螺钉的1.99倍(p < 0.001),最大扭矩为1.607±0.427 Nm,是标准螺钉的2.56倍(p < 0.001)。结论:与标准螺钉相比,PTTI螺钉产生的最大和平均插入扭矩更大,即使在松质骨模型中用作救援螺钉时也是如此。进一步的研究评估PTTI螺钉的临床结果和失败率将更好地确定其临床应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Porous threaded titanium implant screws have higher insertional torque compared to standard screws.

Purpose: Posterior pelvic ring screw back out and loss of fixation may result from poor screw purchase, prevalent in geriatric pelvic ring injuries where the cancellous bone is often osteoporotic. To reduce screw back out, there has been increasing use of porous threaded titanium implant (PTTI) screws for posterior pelvic fixation rather than standard cannulated, buttress threaded screws. This study aims to assess the insertional torque of PTTI screws compared to standard cannulated screws as there is limited evidence regarding the biomechanical fixation profiles among screws.

Methods: Fifteen orthopedic trauma surgeons inserted screws into a validated surrogate for osteoporotic cancellous bone. Insertional torque was measured during screw placement in three separate scenarios for each surgeon: (1) placement of a standard 7.3 mm (mm) screw into a new bone model, (2) placement of a PTTI screw into a new bone model, and (3) placement of a PTTI screw through a previously placed 7.3 mm screw hole from which it was removed (rescue screw). The insertional torque was calculated across all surgeons and analyses were conducted comparing scenarios (1) and (2), and (1) and (3).

Results: The average insertional torque of 7.3 mm screws was 0.358 ± 0.223 Nm, and the maximum insertional torque was 0.627 ± 0.365 Nm. The average insertional torque for the PTTI screws was 0.929 ± 0.551 Nm, 2.59 times more than that of the 7.3 mm screw (p < 0.001) while the maximum insertional torque was 1.877 ± 0.671 Nm, 2.99 times that of the standard screw (p < 0.001). When placed into the prior 7.3 mm screw hole (rescue), the PTTI screws generated an average insertional torque of 0.711 ± 0.405, still 1.99 times greater than that of the 7.3 mm screw (p < 0.001), and maximum torque of 1.607 ± 0.427 Nm, 2.56 times greater than the standard screw (p < 0.001).

Conclusion: Significantly greater maximum and average insertional torque were generated with the PTTI screws compared to the standard screws, even when used as a rescue screw in cancellous bone models. Further studies assessing clinical outcomes and failure rates with PTTI screws will better define their clinical utility.

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来源期刊
CiteScore
3.00
自引率
5.90%
发文量
265
审稿时长
3-8 weeks
期刊介绍: The European Journal of Orthopaedic Surgery and Traumatology (EJOST) aims to publish high quality Orthopedic scientific work. The objective of our journal is to disseminate meaningful, impactful, clinically relevant work from each and every region of the world, that has the potential to change and or inform clinical practice.
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