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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2017

Open Access 01-12-2017 | Research article

The effect of different screw-rod design on the anti-rotational torque: a biomechanical comparison of three conventional screw-rod constructs

Authors: Zifang Huang, Chongwen Wang, Hengwei Fan, Wenyuan Sui, Xueshi Li, Qifei Wang, Junlin Yang

Published in: BMC Musculoskeletal Disorders | Issue 1/2017

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Abstract

Background

Screw-rod constructs have been widely used to correct spinal deformities, but the effects of different screw-rod systems on anti-rotational torque have not been determined. This study aimed to analyze the biomechanical effect of different rod-screw constructs on anti-rotational torque.

Methods

Three conventional spinal screw-rod systems (Legacy, RF-F-10 and USSII) were used to test the anti-rotational torque in the material test machine. ANOVA was performed to evaluate the anti-rotational capacity of different pedicle screws-rod constructs.

Results

The anti-rotational torque of Legacy group, RF-F-10 group and USSII group were 12.3 ± 1.9 Nm, 6.8 ± 0.4 Nm, and 3.9 ± 0.8 Nm, with a P value lower than 0.05. This results indicated that the Legacy screws-rod construct could provide a highest anti-rotation capacity, which is 68% and 210% greater than RF-F-10 screw-rod construct and USSII screw-rod respectively.

Conclusions

The anti-rotational torque may be mainly affected by screw cap and groove design. Our result showed the anti-rotational torque are: Legacy system > RF-F-10 system > USSII system, suggesting that appropriate rod-screw constructs selection in surgery may be vital for anti-rotational torque improvement and preventing derotation correction loss.
Literature
1.
Cotrel Y, Dubousset J, Guillaumat M. New universal instrumentation in spinal surgery. Clin Orthop Relat Res. 1988;227:10–23.PubMed
2.
Krismer M, Bauer R, Sterzinger W. Scoliosis correction by Cotrel-Dubousset instrumentation. The effect of derotation and three-dimensional correction. Spine. 1992;17:S263–9.CrossRefPubMed
3.
Lee SM, Suk SI, Chung ER. Direct vertebral rotation: a new technique of three-dimensional deformity correction with segmental pedicle screw fixation in adolescent idiopathic scoliosis. Spine. 2004;29:343–9.CrossRefPubMed
4.
Mladenov KV, Vaeterlein C, Stuecker R. Selective posterior thoracic fusion by means of direct vertebral derotation in adolescent idiopathic scoliosis: effects on the sagittal alignment. Eur Spine J. 2011;20:1114–7.CrossRefPubMedPubMedCentral
5.
6.
Hwang SW, Samdani AF, Gressot LV. Effect of direct vertebral body derotation on the sagittal profile in adolescent idiopathic scoliosis. Eur Spine J. 2012;12:31–9.CrossRef
7.
Hwang SW, Dubaz OM, Ames R, et al. The impact of direct vertebal body derotation on the lumbar prominence in Lenke Type 5C curves. J Neurosurg Spine. 2012;17(4):308–13.CrossRefPubMed
8.
Hwang SW, Samdani AF, Lonner B, et al. Impact of direct vertebral body derotation on rib prominence: are preoperative factors predictive of changes in rib prominence? Spine (Phila Pa 1976). 2012;37(2):E86–9.CrossRef
9.
Vallespir GP, Flores JB, Trigueros IS. Vertebral coplanar alignment: a standardized technique for three dimensional correction in scoliosis surgery: technical description and preliminary results in Lenke type 1 curves. Spine. 2008;33:1588–97.CrossRefPubMed
10.
Qiu Y, Zhu F, Wang B. Comparison of surgical outcomes of Lenke type 1 idiopathic scoliosis: vertebral coplanar alignment versus derotation technique. J Spinal Disord Tech. 2011;12:492–9.
11.
Huang Z, Wang Q, Yang J, et al. Vertebral derotation by vertebral column manipulator improves postoperative radiographs outcomes of Lenke 5C patients for follow up minimum 2 year. J Spinal Disord Tech. 2014;4. [Epub ahead of print].
12.
Yang J, Huang Z, Grevitt MP, et al. Double-curve synchronous derotation with convex correction: a new corrective technique for adolescent idiopathic scoliosis with double curves. J Spinal Disord Tech. 2014;27(1):E32–6.CrossRefPubMed
13.
Sun L, Song Y, Liu L, et al. Bilateral apical vertebal derotation technique by vertebral column manipulation compare with vertebral coplanar alignment technique in the correction of Lenke I type idiopathic scoliosis. BMC Musculoskelet Disord. 2013;14:175.CrossRefPubMedPubMedCentral
14.
Fu G, Kawakami N, Goto M. Comparison of vertebral rotation corrected by different techniques and anchors in surgical treatment of adolescent thoracic idiopathic scoliosis. J Spinal Disord Tech. 2009;22:182–9.CrossRefPubMed
15.
Cui G, Watanabe K, Nishiwaki Y, et al. Loss of apical vertebral derotation in adolescent idiopathic scoliosis: 2-year follow-up using multi-planar reconstruction computed tomography. Eur Spine J. 2012;21(6):1111–20.CrossRefPubMedPubMedCentral
16.
Cholewicki J, Crisco JJ 3rd, Oxland TR. Effects of posture and structure on three-dimensional coupled rotations in the lumbar spine. Spine. 1996;21:2421–8.CrossRefPubMed
17.
Perdriolle R, Vidal J. Morphology of scoliosis: three-dimensional evolution. Orthopedics. 1987;10:909–15.PubMed
18.
19.
Weinstein SL, Zavala DC, Ponseti IV. Idiopathic scoliosis: long-term follow-up and prognosis in untreated patients. J Bone Joint Surg Am. 1981;63:702–12.CrossRefPubMed
20.
Aronsson DD, Stokes IA, Ronchetti PJ. Surgical correction of vertebral axial rotation in adolescent idiopathic scoliosis: prediction by lateral bending films. J Spinal Disord. 1996;9:214–9.CrossRefPubMed
21.
Behensky H, Cole AA, Freeman BJ. Fixed lumbar apical vertebral rotation predicts spinal decompensation in Lenke type 3C adolescent idiopathic scoliosis after selective posterior thoracic correction and fusion. Eur Spine J. 2007;16:1570–8.CrossRefPubMedPubMedCentral
22.
Perdriolle R, Vidal J. Thoracic idiopathic scoliosis curve evaluation and prognosis. Spine. 1985;10:785–91.CrossRefPubMed
23.
Steib JP, Dumas R, Mitton D. Surgical correction of scoliosis by in situ contouring: a detorsion analysis. Spine. 2004;29:193–9.CrossRefPubMed
Metadata
Title
The effect of different screw-rod design on the anti-rotational torque: a biomechanical comparison of three conventional screw-rod constructs
Authors
Zifang Huang
Chongwen Wang
Hengwei Fan
Wenyuan Sui
Xueshi Li
Qifei Wang
Junlin Yang
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2017
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-017-1683-1

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