The Prevalence and Risk Factors for S2 Alar-Iliac Screw Loosening with a Minimum 2-Year Follow-up.
Bony fusion
Risk factors
S2 alar-iliac screw
Screw loosening
Journal
Asian spine journal
ISSN: 1976-1902
Titre abrégé: Asian Spine J
Pays: Korea (South)
ID NLM: 101314177
Informations de publication
Date de publication:
Apr 2020
Apr 2020
Historique:
received:
30
04
2019
accepted:
25
06
2019
pubmed:
5
11
2019
medline:
5
11
2019
entrez:
5
11
2019
Statut:
ppublish
Résumé
A retrospective cohort study. The purpose of this study was to investigate the prevalence and risk factors for S2 alar-iliac (SAI) screw loosening following lumbosacral fixation, with a minimum 2-year follow-up. Although SAI screws allow surgeons to perform lumbosacral fixation with a low profile and enhanced biomechanical strength, screw loosening following surgery can occur in some cases. However, few studies have investigated the prevalence and risk factors for SAI screw loosening. This retrospective study included 35 patients (mean age, 72.8±8.0 years; male, 10; female, 25) who underwent lumbosacral fixation using SAI screws with at least 2 years of follow-up. SAI screw loosening and L5-S bony fusion were assessed using computed tomography. The period for which the screws appeared loose and the risk factors for SAI screw loosening were investigated 2 years after surgery. A total of 70 SAI screws and 70 S1 pedicle screws were inserted. Loosening was observed 0.5, 1, and 2 years after surgery in 17 (24.3%), 35 (50.0%), and 35 (50.0%) SAI screws, respectively. Bony fusion rate at L5-S was significantly lower in patients with SAI screw loosening than in those without screw loosening (65.0% vs. 93.3%, p =0.048). The score for SAI screw contact with the iliac cortical bone and the bony fusion rate at L5-S were significantly lower in the loosening group than in the non-loosening group (1.8±0.5 vs. 2.2±0.3, p <0.001, respectively). Postoperative pelvic incidence-lumbar lordosis was significantly higher in the loosening group than in the non-loosening group (7.9°±15.4° vs. 0.5°±8.7°, p =0.02, respectively). SAI screw loosening is closely correlated with pseudoarthrosis at L5-S. Appropriate screw insertion and optimal lumbar lordosis restoration are important to prevent postoperative complications related to SAI screws.
Identifiants
pubmed: 31679321
pii: asj.2019.0127
doi: 10.31616/asj.2019.0127
pmc: PMC7113458
doi:
Types de publication
Journal Article
Langues
eng
Pagination
177-184Références
Spine (Phila Pa 1976). 2001 Sep 15;26(18):1950-5
pubmed: 11547192
J Neurosurg Spine. 2015 Jul;23(1):67-76
pubmed: 25840042
Spine (Phila Pa 1976). 2009 May 20;34(12):E439-42
pubmed: 19454996
Spine J. 2010 Jul;10(7):595-601
pubmed: 20434406
Eur Spine J. 2015 May;24(5):1085-91
pubmed: 25323138
J Spinal Disord Tech. 2015 May;28(4):E199-205
pubmed: 25627809
Spine (Phila Pa 1976). 2010 Dec 1;35(25):2245-51
pubmed: 21102300
Spine (Phila Pa 1976). 2010 Sep 15;35(20):1887-92
pubmed: 20802390
Spine (Phila Pa 1976). 2006 Feb 1;31(3):303-8
pubmed: 16449903
Spine (Phila Pa 1976). 2017 Sep 1;42(17):E1024-E1030
pubmed: 27997507
J Korean Neurosurg Soc. 2015 Oct;58(4):357-62
pubmed: 26587190
J Neurosurg Spine. 2010 Nov;13(5):606-11
pubmed: 21039152
World Neurosurg. 2016 Sep;93:253-60
pubmed: 27319308
Spine (Phila Pa 1976). 1998 Nov 1;23(21):2289-94
pubmed: 9820908
J Neurosurg Spine. 2011 Nov;15(5):472-8
pubmed: 21761967
Spine J. 2017 Jun;17(6):875-879
pubmed: 28185981
J Neurosurg Spine. 2013 Oct;19(4):445-53
pubmed: 23909551
Spine (Phila Pa 1976). 2017 Feb;42(3):E142-E149
pubmed: 27254657
Clin Spine Surg. 2017 Feb;30(1):E49-E53
pubmed: 28107243
Spine (Phila Pa 1976). 2006 Sep 15;31(20):2329-36
pubmed: 16985461
J Pediatr Orthop. 2017 Dec;37(8):e470-e475
pubmed: 26756987
Spine (Phila Pa 1976). 2009 Mar 1;34(5):436-40
pubmed: 19247163