Abstract:
STUDY DESIGN:Experimental study. OBJECTIVE:To evaluate the biomechanical stability of screws placed in expanded pedicles, and to compare those with the screws placed in the nonexpanded pedicles in an in vivo model. SUMMARY OF BACKGROUND DATA:Pullout strength of a pedicle screw increases as the diameter of the screw gets larger. Small pedicles of pediatric patients prevent the use of large size pedicle screws in this age group. As shown in an in vitro study one option to overcome this problem is to dilate and use larger screw in immature spine. But dilation reduces the pullout strength of pedicle screws in in vitro model. METHODS:Six-week-old 3 pigs were used. One of them was lost in the postoperative period. After posterior subperiosteal exposure of lumbar segments (L1-L5), 4.0 mm diameter and 20 mm long pedicle screws were placed on the left. The right pedicles were dilated with stainless steel dilators and instrumented with screws of same dimension. At the end of 3 months the pigs were killed and the pull out strength of each screw were measured. RESULTS:The average pull out strength of the expanded and nonexpanded screws was 378.7 +/- 73 (542-308) Newton and 397 +/- 80 (535-289) Newton, respectively. There was no statistically significant difference between the 2 groups. CONCLUSION:The biomechanical stability of the same size screws inserted at the expanded and nonexpanded pedicles are the same after 3 months. Even dilation of the pedicle decreases the pullout strength of the screw at the beginning, and the pull out strength of both sides became equal after 3 months. The remodeling capacity of pedicles and overgrowth of bone on screws may have an effect on this result.
journal_name
Spine (Phila Pa 1976)journal_title
Spineauthors
Yilmaz G,Demirkiran G,Ozkan C,Daglioglu K,Pekmezci M,Alanay A,Yazici Mdoi
10.1097/BRS.0b013e3181b0bb9bsubject
Has Abstractpub_date
2009-10-15 00:00:00pages
2378-83issue
22eissn
0362-2436issn
1528-1159pii
00007632-200910150-00004journal_volume
34pub_type
杂志文章相关文献
SPINE文献大全abstract:STUDY DESIGN:A surgical technique for primary closure of postoperative subfascial infections is described. OBJECTIVES:To describe the methods and indications for the use of the interconnected latissimus dorsi-gluteus maximus flap. SUMMARY OF BACKGROUND DATA:Closure of subfascial postoperative infection can be complic...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199703010-00021
更新日期:1997-03-01 00:00:00
abstract:STUDY DESIGN:Analysis of segmental and total lumbar range of motion (ROM) before and after total lumbar disc replacement. OBJECTIVE:To examine the relationship between absolute segmental and total lumbar ROM and evolution of ROM on clinical outcome. SUMMARY OF BACKGROUND DATA:At the moment, data are scarce with regar...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e31819b213c
更新日期:2009-04-20 00:00:00
abstract:STUDY DESIGN:Survey. OBJECTIVE:The aim of this study was to objectify the burden of adolescent idiopathic scoliosis (AIS) to better advocate for scoliosis care in the future. SUMMARY OF BACKGROUND DATA:AIS is a common spinal deformity that can affect individuals on many levels. Patients with big curves usually seek m...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000001708
更新日期:2017-01-15 00:00:00
abstract:STUDY DESIGN:Retrospective review of anterior and posterior fusions for treatment of adolescent idiopathic thoracic scoliosis. OBJECTIVES:To evaluate both the instrumented thoracic and the spontaneous lumbar curve corrections after treatment of the primary thoracic scoliosis by either anterior or posterior fusion. SU...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199908150-00007
更新日期:1999-08-15 00:00:00
abstract:STUDY DESIGN:Case report of late postoperative complication. SUMMARY OF BACKGROUND DATA:There have been a number of reports of migration and extrusion of cervical fusion instrumentation. The majority of such cases have a benign outcome. To our knowledge, cervical instrumentation extrusion resulting in prevertebral abs...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000186861.82651.00
更新日期:2005-11-15 00:00:00
abstract:STUDY DESIGN:This is a technical note and review of the literature. OBJECTIVE:We propose to describe a revised surgical technique of C1 lateral mass screw insertion with protection of C1-C2 venous sinus surrounding the C2 nerve root. SUMMARY OF BACKGROUND DATA:During C1 lateral mass screw insertion and in posterior C...
journal_title:Spine
pub_type: 杂志文章,评审
doi:10.1097/BRS.0b013e3181e215ff
更新日期:2010-10-01 00:00:00
abstract:STUDY DESIGN:This case study is designed to report the previously unreported specific complication of acute cauda equina compression after decompression surgery for spinal stenosis. OBJECTIVES:To inform others of the possibility of such a complication; to suggest a possible mechanism for this situation, namely hourgla...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199511001-00017
更新日期:1995-11-15 00:00:00
abstract:STUDY DESIGN:A case is presented with clinical and radiologic follow-up assessment to evaluate the possible effectiveness of tandem interbody fusion grafting. OBJECTIVE:To design a technique for rescuing a long iliac crest bone autograft that is too short or must be shortened because of the undesirable shape some long...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-200106010-00023
更新日期:2001-06-01 00:00:00
abstract:STUDY DESIGN:A retrospective study investigated the progression risk of juvenile scoliosis until skeletal maturity or spinal fusion. OBJECTIVES:To define risk factors of curve progression during pubertal growth and analyze the timing of arthrodesis. SUMMARY OF BACKGROUND DATA:Juvenile scoliosis is characterized by a ...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000229230.68870.97
更新日期:2006-08-01 00:00:00
abstract::In nine patients who underwent anterior cervical fusions for cervical spondylosis, preoperative cervical spine films were compared with radiographs taken seven to 15 years after fusion. Eight of the nine patients were found to have radiographic evidence of increased degenerative diseases located primarily below the le...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198009000-00002
更新日期:1980-09-01 00:00:00
abstract:STUDY DESIGN:Cross-cultural adaptation and psychometric analysis. OBJECTIVE:The aim of this study wad to develop "Fremantle Neck Awareness Questionnaire Turkish (FreNAQ-T)" and to investigate the validity, reliability, and psychometric properties of FreNAQ-T in the Turkish population with chronic neck pain (CNP). SUM...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003207
更新日期:2020-02-01 00:00:00
abstract:STUDY DESIGN:Thirty-five lumbar disc herniations removed at surgery were studied by indirect immunocytochemistry. OBJECTIVES:To localize immunohistochemically both sensory and autonomic nerve terminals in disc herniations. SUMMARY OF BACKGROUND DATA:Using various more or less specific histologic and histochemical met...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199606010-00004
更新日期:1996-06-01 00:00:00
abstract:STUDY DESIGN:Retrospective review. OBJECTIVE:To assess the relationship between age and complications, and report age-stratified complication rates for the surgical treatment of adult scoliosis. SUMMARY OF BACKGROUND DATA:Literature examining age and complication rates for adult scoliosis surgery is conflicting. The ...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000001239
更新日期:2016-03-01 00:00:00
abstract:STUDY DESIGN:Biomechanical spine model. Comparison of stress in the implant and the adjacent cranial segment was done with conventional rigid versus dynamic stabilization system (DS) fixation. OBJECTIVE:The aim of this study was to study stress at the proximal end of spinal fixation with a novel DS. SUMMARY OF BACKGR...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003862
更新日期:2020-12-08 00:00:00
abstract:STUDY DESIGN:Twenty-seven patients underwent instrumented transforaminal lumbar interbody fusion (TLIF) procedures using bioresorbable implants as interbody spacers. The greater than 2-year clinical and radiographic results of this series are presented along with as a review of relevant preclinical and preliminary clin...
journal_title:Spine
pub_type: 临床试验,杂志文章
doi:10.1097/01.brs.0000175185.46433.7a
更新日期:2005-09-01 00:00:00
abstract:STUDY DESIGN:A cross-sectional study. OBJECTIVE:To investigate bone mineral density (BMD) and the change of bone turnover rate in postmenopausal women with lumbar spinal stenosis (LSS). SUMMARY OF BACKGROUND DATA:Symptomatic LSS prevents elderly patients from performing daily activities because of back pain and neuro...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3181829fca
更新日期:2008-10-15 00:00:00
abstract:STUDY DESIGN:A biomechanical study comparing two materials for augmentation of osteoporotic vertebral bodies and vertebral bodies after compression fracture. OBJECTIVES:To compare an injected, biodegradable calcium phosphate bone substitute with injected polymethylmethacrylate bone cement for strengthening osteoporoti...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199908010-00004
更新日期:1999-08-01 00:00:00
abstract:STUDY DESIGN:An in vivo rat-tail model was adopted to study the structural changes of degenerated intervertebral disc after different traction protocols. OBJECTIVE:To investigate the effects of traction with different modes and magnitudes on disc with simulated degeneration. SUMMARY OF BACKGROUND DATA:Traction has be...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3181c617f6
更新日期:2010-06-15 00:00:00
abstract:STUDY DESIGN:An in vivo study was designed to compare the efficacy of biomimetic magnesium-hydroxyapatite (MgHA) and of human demineralized bone matrix (HDBM), both dispersed in a mixture of biomimetic MgHA nanoparticles, with that of an autologous bone graft. OBJECTIVE:The objective of this study was to evaluate 2 ne...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000311
更新日期:2014-05-15 00:00:00
abstract:STUDY DESIGN:T1rho relaxation was quantified and correlated with intervertebral disc degeneration and proteoglycan content in cadaveric human lumbar spine tissue. OBJECTIVE:To show the use of T1rho-weighted magnetic resonance imaging (MRI) for the assessment of degeneration and proteoglycan content in the human interv...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000217708.54880.51
更新日期:2006-05-15 00:00:00
abstract:STUDY DESIGN:Retrospective cohort study. OBJECTIVE:Compare a novel two-step algorithm for indicating a computed tomography angiography (CTA) in the setting of a cervical spine fracture with established gold standard criteria. SUMMARY OF BACKGROUND DATA:As CTA permits the rapid detection of blunt cerebrovascular injur...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003163
更新日期:2019-12-01 00:00:00
abstract:STUDY DESIGN:A report of a case of lumbar spine duplication with the clinical appearance of adolescent scoliosis. OBJECTIVE:To increase knowledge about the pathogenesis and treatment of lumbar spinal duplication. SUMMARY OF BACKGROUND DATA:Although there have been other reports of lumbar spine duplication of this mag...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199802150-00021
更新日期:1998-02-15 00:00:00
abstract:STUDY DESIGN:Experimental study with human mesenchymal stem cells (MSCs) and intervertebral disc (IVD) tissue samples. OBJECTIVE:This study aimed to characterize the effect of MSC homing on the Tie2-positive IVD progenitor cell population, IVD cell survival, and proliferation. SUMMARY OF BACKGROUND DATA:Homing of hum...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003150
更新日期:2019-12-01 00:00:00
abstract:STUDY DESIGN:Retrospective cohort study. OBJECTIVE:To investigate the association between preoperative baseline serum albumin and postoperative surgical complication. SUMMARY OF BACKGROUND DATA:The prevalence of malnutrition in the hospitalized patient population has only been recently recognized. Preoperative hypoal...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000450
更新日期:2014-08-15 00:00:00
abstract:STUDY DESIGN:Prospective cross-sectional study. OBJECTIVE:To analyze the association of tomographically identified axial gouty lesions with clinical and laboratory characteristics. SUMMARY OF BACKGROUND DATA:Axial gout might be more common than previously thought. The true relationship of these lesions to symptoms or...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000633
更新日期:2014-12-01 00:00:00
abstract::A retrospective study has been made of 264 posterior spinal fusions performed between 1972 and 1978 at the Good Samaritan Hospital in Cincinnati. Two hundred ten of the procedures were performed under hypotensive anesthesia. Blood loss and total blood replacement were related to the mean arterial pressure (MAP) during...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198407000-00005
更新日期:1984-07-01 00:00:00
abstract:STUDY DESIGN:Prospective cohort. OBJECTIVE:The purpose of this study was to evaluate changes in bone mineral density (BMD) in the intertransverse fusion mass as representative for the process of bone remodeling after spinal fusion. SUMMARY OF BACKGROUND DATA:Intertransverse bone graft is frequently applied to facilit...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e318276fa27
更新日期:2013-04-15 00:00:00
abstract::An algorithm for the sequential management of the patient with low-back pain has been formulated from evaluation of treatment outcomes. Patients presenting with back pain complaints and cauda equina syndrome are evaluated with immediate myelography. Without this complication, back pain patients are treated with 6 week...
journal_title:Spine
pub_type: 杂志文章
doi:
更新日期:1979-03-01 00:00:00
abstract:STUDY DESIGN:A unique case of pseudo-aneurysm of a lumbar artery after injury of the thoracolumbar spine was presented. OBJECTIVE:To describe the exceptional occurrence of pseudo-aneurysm of a lumbar artery after flexion-distraction fracture of thoracolumbar junction and to discuss the mechanism of formation and the t...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3181624b93
更新日期:2008-02-01 00:00:00
abstract:STUDY DESIGN:Case-control study. OBJECTIVE:We designed a case-control study to analyze the risk factors associated with the development of heterotopic ossification (HO) in patients with traumatic spinal cord injury. SUMMARY OF BACKGROUND DATA:Patients with spinal cord injury have a high risk of developing HO, althoug...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e31825ee81b
更新日期:2012-11-01 00:00:00