Revision of the failed pedicle screw in osteoporotic lumbar spine: Biomechanical comparison of kyphoplasty versus transpedicular polymethylmethacrylate augmentation
Yükleniyor...
Tarih
2012
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Turkish Joint Diseases Foundation
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Objectives: In this study, we aimed to compare of kyphoplasty versus transpedicular polymethylmethacrylate (PMMA) augmentation biomechanically in the revision of the failed pedicle screw in osteoporotic lumbar spine. Materials and methods: Bone mineral density (BMD) of, lumbar vertebrae collected from four bovines were measured., Each vertebra was decalcified with hydrochloric acid solution to obtain osteoporotic specimens. Primary polyaxial pedicle screws, were inserted into the pedicles and pulled out until they failed. The pullout strength results of all specimens were recorded. Revision pedicle screws were randomly inserted into the same pedicles by either pedicle hole PMMA augmented (group 1) or kyphoplasty (Xvoid (TM)) PMMA augmented pedicle screws (group 2). The pullout strength results of all specimens were re-recorded. Results: The mean BMD significantly decreased from 1.686 +/- 227.9 g/cm(2) to 1.432 +/- 157.1 g/cm(2) following decalcification (p<0.001). In group 1, the mean pullout strength of primary screws significantly decreased from 3443 +/- 1086 N/m(2) to 2088 +/- 924 N/m(2) following pedicle screw augmentation (p=0.006). In group 2 the mean pullout strength of primary screws decreased from 3702 +/- 1063 N/m(2) to 3664 +/- 1057N/m(2) following kyphoplasty augmentation (p=0.934). Pedicle screw augmentation group achieved significantly lower pullout strength values than kyphoplasty pedicle hole augmentation group (p=0.002). Conclusion: Although pedicle hole PMMA augmentation is the gold standard for the failed screws in an osteoporotic bone, kyphoplasty augmented pedicle screw seems to be more effective method increasing the pullout strength.
Açıklama
Anahtar Kelimeler
Bone screws, lumbar vertebrae surgery, osteoporosis, treatment, failure
Kaynak
Eklem Hastaliklari Ve Cerrahisi-Joint Diseases And Related Surgery
WoS Q Değeri
Q4
Scopus Q Değeri
N/A
Cilt
23
Sayı
2
Künye
Derincek A., Türker M., Çınar M., Kalaycıoğlu B., Çetik Ö. (2012). Revision of the failed pedicle screw in osteoporotic lumbar spine: Biomechanical comparison of kyphoplasty versus transpedicular polymethylmethacrylate augmentation. Eklem Hastalıkları ve Cerrahisi Dergisi (Eski Adı: Artroplasti Artroskopik Cerrahi Derg.), 23(2), 106 - 110.
