Finite Element Analysis of Short- Versus Long-Segment Posterior Fixation for Thoracolumbar Burst Fracture

Başaran, Recep; Efendioğlu, Mustafa; Kaksi, Mustafa; Çelik, Talip; Mutlu, İbrahim; Uçar, Mehmet

doi:10.1016/j.wneu.2019.05.077

Cited by 40 publications

(50 citation statements)

References 39 publications

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“…Currently, a fervent debate is focused on the treatment for OVF using short segment (SSS) or long segment stabilization (LSS). Some surgeons prefer to save motion of adjacent segments, hence choosing SSS, whereas other surgeons opt to obtain a more stable construct with LSS but sacrificing some segment of motion [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Long versus Short Segment Instrumentation in Osteoporotic Thoracolumbar Vertebral Fracture

et al. 2021

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This study aimed to compare clinical and radiological data and rate of mechanical complications in elderly patients treated with short segment (SSS) or long segment stabilization (LSS) for thoracolumbar junction osteoporotic vertebral fractures (OVFs). Overview of Literature: A fervent debate is now focused on the treatment of OVF using SSS or LSS. High rate of complications is associated with pedicle screw fixation because of poor bone quality. Methods: Patients over 65 years old with a T-score of <−2.5, affected by (T10-L2) vertebral fracture treated with LSS or SSS pedicle screw fixation, with at least 24 months of follow-up were evaluated. All patients were analyzed with conventional X-ray to evaluate bisegmental kyphotic angle (BKA) and clinically with Visual Analog Scale (VAS), Oswestry Disability Index (ODI), and rate of mechanical complications at 2, 6, 12, and 24 months. Data were expressed as mean±standard deviation. Student t-test was used to compare clinical scores between populations. Mann-Whitney U-test was used to analyze clinical and radiological variable, whereas Fisher's exact test was used to identify differences in the rate of complications between groups. Results: A total of 37 patients met the inclusion criteria. Mean follow-up was 33.97±9.26 months. For both groups, ODI and VAS significantly decreased over time with good results (p<0.00001). At the final follow-up, no significant differences were found in terms of ODI and VAS. There was no difference in correction of BKA between groups; however, a significant difference was found in LSS group between pre-and postoperative BKA (p=0.046), whereas no difference was found in SSS group. A significant difference in the rate of mechanical complications was found between groups (p=0.011). Conclusions: Both treatments showed good clinical and radiological results; however, LSS group showed better BKA correction and lower mechanical complications than SSS group.

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Section: Introductionmentioning

confidence: 99%

Long versus Short Segment Instrumentation in Osteoporotic Thoracolumbar Vertebral Fracture

et al. 2021

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“…Pedikül vidasının uzunluğu 45 mm, diş dibi çapı 4 mm, diş üstü çapı 6.5 mm, vida adımı 2.5 mm olacak şekilde tasarlanmıştır. Rod çapı ise 6 mm'dir (Basaran et. al.…”

Section: üç Boyutlu Modellemeunclassified

“…Yakınsama çalışmasında modellere farklı element boyutları atanarak analizler gerçekleştirilmiş ve elde edilen gerilme değerleri değerlendirilmiştir. Ayrıca, benzer sonlu elemanlar çalışmaları ile karşılaştırılarak sonuçlar irdelenmiştir (Basaran et. al.…”

Section: Sonlu Elemanlar Modeliunclassified

Pedikül Vidaları İçin PLA Malzeme Kullanımının Mukavemet Açısından Değerlendirilmesi

Çelik

Taşdemirci²,

Mutlu³

et al. 2021

Afyon Kocatepe University Journal of Sciences and Engineering

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Omurga sorunlarında sıklıkla pedikül vida ve rod sistemleri kullanılır. Bu sistemlerin en büyük sorunları vida kırılması ve vida gevşemesidir. Vida ve rod malzemesi olarak halihazırda metalik implantlar kullanılmaktadır ve metalik implantların elastik modüllerinin yüksek olması sebebi ile kemiğe yük aktarımında sıkıntılar oluşabilmektedir. Bu çalışmada, metalik implantlara göre elastiklik modülü daha düşük olan ve son zamanlarda kullanımı artan Polilaktik Asit (PLA) malzemesi ve bu malzemeden oluşturulan Polilaktik Asit/Hidroksiapatit (PLA/HA) kompozit malzemesinin pedikül vidalarında kullanılabilirliği mukavemet yönünden değerlendirilmiştir. Bu amaçla sonlu elemanlar yöntemi kullanılmıştır. T9 omurga modeli MIMICS yazılımı ile oluşturulmuş ve vida-rod modelleri ile ameliyat prosedürüne uygun olarak bilgisayar ortamında birleştirilmiştir. Sonlu elemanlar analizi için pedikül vida malzemeleri Ti6Al4V, PLA ve PLA/HA malzemeleri seçilmiştir. Ayrıca, pedikül vida modeli üzerinde tasarım değiştirerek iki farklı model daha analize katılmıştır. Yapılan 5 farklı analiz sonuçları karşılaştırılmış ve en uygun pedikül malzemesi/tasarımı belirlenmiştir. Sonuç olarak, PLA/HA kompozit malzeme kullanımı yeterli mukavemete ve rijitliğe sahip olmuştur. Ayrıca, vida tasarım değişikliği ile PLA malzemesi pedikül vidalar için kullanılabilir.

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“…Thus, long-segment instrumentations of the thoracic spine achieve a 90 % reduction of extension/flexion [27]. However, more recent finite element analysis shows that short-segment stabilisation may well be sufficient for physiological loading [28].…”

Section: Fusion Lengthmentioning

confidence: 99%

“…So erreichen langstreckige Instrumentierungen an der Brustwirbelsäule eine bis zu 90 %ige Reduktion von Re-/Inklination [27]. Allerdings zeigen neuere Finite-Elemente-Analysen, dass kurzstreckige Stabilisierungen für physiologische Belastungen ausreichend sein könnten [28]. Insbesondere durch die zusätzliche Anwendung sog.…”

Section: Länge Der Stabilisierungunclassified

Traumatic Fractures of the Thoracic Spine

et al. 2020

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The majority of traumatic vertebral fractures occur at the thoracolumbar junction and the lumbar spine and less commonly at the mid-thoracic and upper thoracic spine. In accordance, a high number of articles are dealing with thoracolumbar fractures focusing on the thoracolumbar junction. Nonetheless, the biomechanics of the thoracic spine differ from the thoracolumbar junction and the lumbar vertebral spine. The aim of this review is to screen the literature dealing with acute traumatic thoracic vertebral fractures in patients with normal bone quality. Thereby, the diagnostic of thoracic vertebral body fractures should include a CT examination. Ideally, the CT should include the whole thoracic cage particularly in patients suffering high energy accidents or in those with clinical suspicion of concomitant thoracic injuries. Generally, concomitant thoracic injuries are frequently seen in patients with thoracic spine fractures. Particularly sternal fractures cause an increase in fracture instability. In case of doubt, long segment stabilization is recommended in patients with unstable mid- und upper thoracic fractures, particularly in those patients with a high grade of instability.

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Finite Element Analysis of Short- Versus Long-Segment Posterior Fixation for Thoracolumbar Burst Fracture

Cited by 40 publications

References 39 publications

Long versus Short Segment Instrumentation in Osteoporotic Thoracolumbar Vertebral Fracture

Long versus Short Segment Instrumentation in Osteoporotic Thoracolumbar Vertebral Fracture

Pedikül Vidaları İçin PLA Malzeme Kullanımının Mukavemet Açısından Değerlendirilmesi

Traumatic Fractures of the Thoracic Spine

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