Abstract:
:The expectations of both the patient and surgeon have been greatly revised in the last 10 years with the introduction of pedicle screws (PS) in spinal surgery. In this study, we have retrospectively evaluated and compared the results of PS instrumentation and the Hybrid System (HS), the latter consists of pedicle screws, sublaminar wire and hooks. The mean follow-up period was 60.1 months (range: 49-94 months) for the patients of the HS group and 29.3 months (range: 24-35 months) for those of the PS group. In the HS group, pedicle screws were used at the thoracolumbar junction and lumbar vertebra, the bilateral pediculotransverse claw hook configuration was used at the cranial end of the instrumentation, sublaminar wire was used on the concave side of the apical region and the compressive hook was used on the convex side. In the PS group, PS were used on the concave sides at all levels and on the convex side of the cranial and caudal end of instrumentation, in the transition zone and at the apex. The two groups were comparable for variables such as mean age, preoperative Cobb angle, thoracic kyphosis angle, lordosis angle, coronal balance, flexibility of the curve, apical vertebra rotation (AVR), apical vertebra rotation (AVT) and the number of vertebrae included in the fusion (p>0.05). The parameters of values of correction, ratio of correction loss, AV derotation, AVT correction ratio, amount of blood loss, operation time, postoperative global coronal and sagittal balance, thoracic kyphosis angle and lumbar lordosis angle were measured at the last follow-up and used for comparing the HS and PS groups. There was no statistically significant difference between the groups for correction ratio, postoperative coronal balance, postoperative thoracic kyphosis and lumbar lordosis angle, operation time, amount of blood loss and number of fixation points (p>0.05) The difference for the ratio of correction loss, AV derotation angle and the AVT correction ratio at the last follow-up visit and for the total follow-up period between the groups was found to be statistically significant (p<0.05). Although it is possible to obtain a similar amount of correction by either instrumentation system, the loss of correction seems to be lower with the more rigid PS construction. The PS system also has a stronger effect on vertebral bodies, thereby providing better AV de-rotation. There was no significant difference (p>0.05) between the groups in terms of correction rate, postoperative coronal and sagittal balance, operation time, blood loss and number of fixation points. This may indicate that anchor points are more important than the use--or not--of screws. Correction durability and AV de-rotation was better with PS instrumentation, while AVT was better corrected by HS instrumentation (p<0.05). We propose that the reason for the better correction of AVT with HS instrumentation is the forceful translation offered by the sublaminar wire at the apical region, while the reason for the better correction durability of the PS instrumentation may be due to the fact that multiple pedicle screws which afford three-column control are better at maintaining the correction and preventing late deterioration.
journal_name
Int Orthopjournal_title
International orthopaedicsauthors
Karatoprak O,Unay K,Tezer M,Ozturk C,Aydogan M,Mirzanli Cdoi
10.1007/s00264-007-0359-0subject
Has Abstractpub_date
2008-08-01 00:00:00pages
523-8; discussion 529issue
4eissn
0341-2695issn
1432-5195journal_volume
32pub_type
杂志文章abstract::We treated surgically 14 patients with symptomatic complete dislocation of the acromioclavicular joint. The surgical procedure included reconstruction of the coracoclavicular ligament using the coracoacromial ligament as substitute, reconstruction of the acromioclavicular ligament, and imbrications of the deltotrapezi...
journal_title:International orthopaedics
pub_type: 杂志文章
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journal_title:International orthopaedics
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journal_title:International orthopaedics
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journal_title:International orthopaedics
pub_type: 古典文章,历史文章,杂志文章
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journal_title:International orthopaedics
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pub_type: 杂志文章
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更新日期:2015-04-01 00:00:00
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更新日期:2018-06-01 00:00:00
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更新日期:2020-09-24 00:00:00
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pub_type: 杂志文章
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更新日期:2009-06-01 00:00:00
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pub_type: 杂志文章,评审
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pub_type: 杂志文章
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更新日期:2012-10-01 00:00:00
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更新日期:2011-11-01 00:00:00
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pub_type: 杂志文章
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journal_title:International orthopaedics
pub_type: 杂志文章
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更新日期:1999-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2016-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2009-02-01 00:00:00
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journal_title:International orthopaedics
pub_type: 杂志文章
doi:10.1007/s002640050223
更新日期:1998-01-01 00:00:00
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pub_type: 杂志文章
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