Carbone Jake, Swink Isaac, Muzzonigro Thomas, Diehl Daniel, Oh Michael, Lindsey Derek P, Yerby Scott, Cheng Boyle C
6596Allegheny Health Network, Pittsburgh, PA, USA.
480623SI-BONE, Inc. Santa Clara, CA, USA.
Global Spine J. 2022 Jan;12(1):45-52. doi: 10.1177/2192568220948028. Epub 2020 Sep 16.
An in vitro biomechanics study.
To evaluate the efficacy of triangular titanium implants in providing mechanical stabilization to a sacroiliac joint with primary and revision sized implants.
Ten lumbopelvic cadaveric specimens were tested in 4 stages: intact, pubic symphysis sectioned, primary, and simulated revision. Primary treatment was performed using 3 laterally placed triangular titanium implants. To simulate revision conditions before and after bone ingrowth and ongrowth on the implants, 7.5-mm and 10.75-mm implants were randomly assigned to one side of each specimen during the simulated revision stage. A 6 degrees of freedom spinal loading frame was used to load specimens in 4 directions: flexion extension, lateral bending, axial torsion, and axial compression. Biomechanical evaluation was based on measures of sacroiliac joint rotational and translational motion.
Both primary and revision implants showed the ability to reduce translational motion to a level significantly lower than the intact condition when loaded in axial compression. Simulated revision conditions showed no statistically significant differences compared with the primary implant condition, with the exception of flexion-extension range of motion where motions associated with the revised condition were significantly lower. Comparison of rotational and translation motions associated with the 7.5- and 10.75-mm implants showed no significant differences between the treatment conditions.
These results indicate that implantation of laterally placed triangular titanium implants significantly reduces the motion of a sacroiliac joint using either the primary and revision sized implants. No statistically significant differences were detected when comparing the efficacy of primary, 7.5-mm revision, or 10.75-mm revision implants.
一项体外生物力学研究。
评估不同尺寸的三角形钛植入物对骶髂关节提供机械稳定作用的效果，包括初次植入和翻修植入。
对10个腰骶部尸体标本分4个阶段进行测试：完整状态、耻骨联合切断、初次植入、模拟翻修。初次治疗采用3枚侧向放置的三角形钛植入物。为模拟植入物骨长入和骨附着前后的翻修情况，在模拟翻修阶段，为每个标本的一侧随机分配7.5毫米和10.75毫米的植入物。使用一个6自由度脊柱加载框架在4个方向对标本加载：屈伸、侧弯、轴向扭转和轴向压缩。生物力学评估基于骶髂关节旋转和平移运动的测量。
在轴向压缩加载时，初次植入和翻修植入物均显示出将平移运动降低到显著低于完整状态水平的能力。模拟翻修情况与初次植入情况相比，除屈伸运动范围外，无统计学显著差异，翻修情况下的运动显著更低。比较7.5毫米和10.75毫米植入物相关的旋转和平移运动，各治疗情况之间无显著差异。
这些结果表明，侧向放置三角形钛植入物，无论是初次植入还是翻修植入，均能显著减少骶髂关节的运动。比较初次植入、7.5毫米翻修或10.75毫米翻修植入物的效果时，未检测到统计学显著差异。
