Abstract:
STUDY DESIGN:A biomechanical cadaveric study in lumbar calf spine. OBJECTIVE:Evaluation of the effects of selected degrees of freedom (df) on the dynamic stabilization of the spine in terms of segmental range of motion (RoM), center of rotation (CoR), and implant loadings. SUMMARY OF BACKGROUND DATA:For dorsal stabilization, rigid implant systems are becoming increasingly complemented by numerous dynamic systems based on pedicle screws and varying df. However, it is still unclear which df is most suitable to accomplish a physiologically related dynamic stabilization, and which loadings are induced to the implants. Human and calf specimens are reported to show certain similarities in their biomechanics. Young healthy calf specimens are not degenerated and show less interindividual differences than elderly human specimens. However, the existing differences between species limit the conclusions in a preclinical setting. METHODS:Six calf specimens from level L3-L4 were analyzed in flexion and extension with a 6-df robotic spine simulator. A clinical functional radiological examination tool was used and parameters such as RoM, CoR, and implant loadings were determined for 6 configurations: (1) intact, (2) defect, (3) rigid fixation, (4) free craniocaudal (CC) rod-sliding, (5) free polyaxiality, and (6) combined free rod-sliding and free polyaxiality. The location of the CoR was determined relative to vertebral body dimensions. A CoR repositioning was defined as sufficient when its median differed less than 5% of the vertebral body dimensions. RESULTS:Free rod-sliding in the CC direction restored the CoR from the defect back to the intact condition. The RoM could be significantly reduced to approximately 1/2 of the intact condition. Compared with the rigid condition, the implant bending moments increased from 0.3/-0.8 Nm (flexion/extension) to 1.3/-1.2 Nm for the free CC rod-sliding condition. CONCLUSION:Free CC rod-sliding restores the intact conditions of the tested kinematic parameters most suitably and at the same time reduces the RoM. Stabilization toward the intact condition could decrease the risk of stress shielding and the progress of segment degeneration. LEVEL OF EVIDENCE:N/A.
journal_name
Spine (Phila Pa 1976)journal_title
Spineauthors
Schulze M,Hartensuer R,Gehweiler D,Vordemvenne T,Raschke MJ,Trautwein F,Heuer Fdoi
10.1097/BRS.0000000000000702subject
Has Abstractpub_date
2015-02-01 00:00:00pages
E133-40issue
3eissn
0362-2436issn
1528-1159journal_volume
40pub_type
杂志文章相关文献
SPINE文献大全abstract:STUDY DESIGN:A review of the current literature on the role of matrix metalloproteinases in intervertebral disc degeneration. OBJECTIVE:To detail the characteristics of matrix metalloproteinases (classification, structure, substrate specificity and regulation) and to report previous studies of intervertebral discs. S...
journal_title:Spine
pub_type: 杂志文章,评审
doi:10.1097/00007632-199807150-00021
更新日期:1998-07-15 00:00:00
abstract:STUDY DESIGN:A radiographical follow-up and analysis. OBJECTIVE:To identify appropriate radiographical parameters for measuring the extent of distal adding-on and to discuss criteria for determining the onset of distal adding-on. SUMMARY OF BACKGROUND DATA:There is no consensus on how to determine the onset of distal...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e318273ed11
更新日期:2013-03-15 00:00:00
abstract:STUDY DESIGN:Observational cohort study. OBJECTIVE:To evaluate by MRI whether a vertebral fracture during childhood is a risk factor for degeneration of adjacent discs. SUMMARY OF BACKGROUND DATA:Several studies infer that trauma is a major cause of disc degeneration. Only 1 study has by magnetic resonance imaging (M...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3181573d6a
更新日期:2007-10-15 00:00:00
abstract:STUDY DESIGN:A review of controlled trials. OBJECTIVES:To determine which interventions are used to prevent back and neck pain problems as well as what the evidence is for their utility. SUMMARY OF BACKGROUND DATA:Given the difficulty in successfully treating long-term back and neck pain problems, there has been a ca...
journal_title:Spine
pub_type: 临床试验,杂志文章,评审
doi:10.1097/00007632-200104010-00019
更新日期:2001-04-01 00:00:00
abstract:STUDY DESIGN:A case report of a ganglion cyst rising from the anulus pulposus, causing lumbar nerve root compression. OBJECTIVES:A rare pathologic condition causing sciatica is described. The pathologic anatomy and the magnetic resonance image of the lesion is discussed. SUMMARY OF BACKGROUND DATA:A 35-year-old man w...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199507150-00013
更新日期:1995-07-15 00:00:00
abstract:STUDY DESIGN:Case-control study. OBJECTIVE:This study is to replicate the association between the promoter polymorphisms of matrix metalloproteinase (MMP)-3 (-1171 5A/6A rs3025058) and interleukin (IL)-6 genes (-174G/C rs1800795) and adolescent idiopathic scoliosis (AIS) in a Chinese Han population. SUMMARY OF BACKGR...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3181c6ba13
更新日期:2010-08-15 00:00:00
abstract::Metastatic bone disease in 322 patients was analyzed to assess the frequency and behavior of disseminated carcinoma to the vertebral column. Breast, lung, and prostate neoplasms were the most frequent tumors of origin in the 55% of patients who had vertebral lesions. The lumbar spine was the site of the greatest numbe...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198501000-00003
更新日期:1985-01-01 00:00:00
abstract:STUDY DESIGN:An in vitro biomechanical study. OBJECTIVE:To perform in vitro biomechanical testing on a lumbar spine using a 6-degree-of-freedom machine. To compare the range of motion (ROM), intradiscal pressure, and facet force of different 3-level dynamic stabilization constructs with traditional rigid constructs. T...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3182a6a4ec
更新日期:2013-10-15 00:00:00
abstract:STUDY DESIGN:Retrospective review of all CT scans of pelvis and abdomen performed at our institution in October and November 2000. OBJECTIVE:To determine the prevalence and extent of radiographic pelvic asymmetry in a population of patients not preselected for having low back pain. SUMMARY OF BACKGROUND DATA:Pelvic a...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.BRS.0000065480.44620.C5
更新日期:2003-06-15 00:00:00
abstract:STUDY DESIGN:Randomized, controlled trial. OBJECTIVE:To evaluate a four-session self-management group intervention for patients with pain in primary care, led by trained lay persons with back pain. The intervention was designed to reduce patient worries, encourage self-care, and reduce activity limitations. BACKGROUN...
journal_title:Spine
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1097/00007632-199812010-00016
更新日期:1998-12-01 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:A national hospitalization database was used to determine rates and trends in the treatment of cervical disc disease. OBJECTIVE:To examine the temporal and geographic variations in hospitalizations and surgical procedures for cervical disc disease. SUMMARY OF BACKGROUND DATA:Studies of spinal surgery dur...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.BRS.0000058880.89444.A9
更新日期:2003-05-01 00:00:00
abstract:STUDY DESIGN:A clinical case report of two brothers with Lesch-Nyhan syndrome found to have atlantoaxial instability is reported. OBJECTIVES:To report the clinical and radiologic findings and the operative outcome in these patients. SUMMARY OF BACKGROUND DATA:Both patients had biochemically proven Lesch-Nyhan syndrom...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199603150-00020
更新日期:1996-03-15 00:00:00
abstract::Decisions about when to operate should be based on more than just an arbitrary Cobb measurement. The patient's skeletal maturity, balance, and other parameters of curve size also should be considered. Although it is desirable to fuse as few segments as possible, there is no benefit to fusing short if the top and botto...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199405000-00020
更新日期:1994-05-01 00:00:00
abstract::The somatosensory cortical evoked potentials recorded during posterior spine fusion and instrumentation for 99 consecutive patients with idiopathic scoliosis, 18 years of age or younger, were retrospectively reviewed. The potentials were recorded from scalp electrodes while synchronously stimulating both tibial nerves...
journal_title:Spine
pub_type: 杂志文章
doi:
更新日期:1991-08-01 00:00:00
abstract::It is hypothesized on the basis of experimental intervertebral disc degeneration that herniated disc is actually newly synthesized proliferative metaplastic fibrocartilage and not herniation of pre-existing disc tissue, particularly that of the nucleus pulposus. Human material in selected surgical tissues was examined...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198809000-00014
更新日期:1988-09-01 00:00:00
abstract:STUDY DESIGN:Randomized controlled animal study. OBJECTIVE:Test the effectiveness of a single-strip demineralized bone matrix with hyaluronan and gelatin. SUMMARY OF BACKGROUND DATA:Demineralized bone matrix is widely used to augment spinal fusion, however, the effect of changing the physical characteristic and carri...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000250982.41666.55
更新日期:2007-01-01 00:00:00
abstract:STUDY DESIGN:An immunohistochemical examination of the presence of inflammatory cells in routinely processed resection specimens of the lumbar disc, and a comparison of the histologic results with clinical data collected prospectively before and after surgery. OBJECTIVES:To assess the influence of inflammatory reactio...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-200004010-00017
更新日期:2000-04-01 00:00:00
abstract:STUDY DESIGN:We present a descriptive case series outlining the surgical technique and outcome in six patients managed with a combined anterior neck and sternal splitting approach. OBJECTIVES:To describe a surgical approach used in the management of severe cervicothoracic kyphosis and/or scoliosis in pediatric patient...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000164267.30422.a9
更新日期:2005-06-01 00:00:00
abstract:STUDY DESIGN:A cluster randomized, controlled trial was performed. OBJECTIVES:To assess the clinical effectiveness and cost-effectiveness of adding patients' referral to neuroreflexotherapy intervention to the usual management of subacute and chronic low back pain in routine general practice. SUMMARY OF BACKGROUND DA...
journal_title:Spine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00007632-200206010-00004
更新日期:2002-06-01 00:00:00
abstract:STUDY DESIGN:A retrospective assessment of coronal, sagittal, and axial correction using convex lumbar pedicle screw constructs compared with hook constructs in patients with idiopathic scoliosis. OBJECTIVE:To determine if pedicle screw constructs can improve coronal, sagittal, and axial correction without increased c...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199605150-00020
更新日期:1996-05-15 00:00:00
abstract:STUDY DESIGN:Histologic analysis of intervertebral disc (IVD) in three types of transgenic mice. OBJECTIVE:To investigate the role of Wnt/β-catenin signaling in regulation of IVD development and organization. SUMMARY OF BACKGROUND DATA:β-catenin dependent Wnt signaling is one of the central regulators in cartilage de...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3181f52cb5
更新日期:2011-04-15 00:00:00
abstract::Bilateral paraspinal electromyogram (EMG) at levels L1-L2 and L4-L5, and abdominal EMG of a group of 20 low-back pain patients were compared to those of a group of 20 pain-free controls during flexion, extension, lateral bending to right and left, and rotation to right and left. The results showed no significant left-...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198710000-00012
更新日期:1987-10-01 00:00:00
abstract:STUDY DESIGN:Retrospective. OBJECTIVE:To examine the relationship between American Society of Anesthesiologists (ASA) score and inpatient pain and narcotics consumption following anterior cervical discectomy and fusion (ACDF). SUMMARY OF BACKGROUND DATA:Higher ASA scores have been previously linked to increased posto...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003135
更新日期:2019-11-15 00:00:00
abstract:STUDY DESIGN:Mechanical and microcomputed tomography (micro-CT) study of cadaver spines. OBJECTIVE:To compare porosity and thickness of vertebral endplates with (1) compressive stresses measured in adjacent intervertebral discs and (2) grade of disc degeneration. SUMMARY OF BACKGROUND DATA:Endplate porosity is import...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000925
更新日期:2015-08-01 00:00:00
abstract:STUDY DESIGN:Systematic review. OBJECTIVE:The authors aim to review comparative outcome measures between robotic and free-hand spine surgical procedures including: accuracy of spinal instrumentation, radiation exposure, operative time, hospital stay, and complication rates. SUMMARY OF BACKGROUND DATA:Misplacement of ...
journal_title:Spine
pub_type: 杂志文章,评审
doi:10.1097/BRS.0000000000002695
更新日期:2018-12-01 00:00:00
abstract:STUDY DESIGN:Retrospective case-control study. OBJECTIVE:The purpose of this study was to examine the factors of postoperative paralysis in patients who have undergone thoracic ossification of posterior longitudinal ligament (OPLL) surgery. SUMMARY OF BACKGROUND DATA:A higher percentage of thoracic OPLL patients expe...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000001585
更新日期:2016-10-01 00:00:00
abstract::The detection of the posterior edge of the L4-L5 intervertebral disc has been accomplished by applying digital image processing techniques on conventional lateral radiograms of the spine, and the method is described. The results of this study have shown that there can be substantial absorption at the site of the disc ...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198209000-00016
更新日期:1982-09-01 00:00:00
abstract:STUDY DESIGN:Literature review and discussion. OBJECTIVE:To discuss the role played by beliefs, expectations, coping, and depression in the transition to chronicity in whiplash-associated disorders (WAD), and to discuss their clinical and research implications. SUMMARY OF BACKGROUND DATA:Psychological factors are imp...
journal_title:Spine
pub_type: 杂志文章,评审
doi:10.1097/BRS.0b013e31823881a4
更新日期:2011-12-01 00:00:00
abstract:STUDY DESIGN:Translation, cross-cultural adaptation and psychometric testing of self-report outcome measurements. OBJECTIVES:The aims of this study were to adapt the Functional Rating Index (FRI) to Brazilian-Portuguese and to test the psychometric properties of this new questionnaire and the Brazilian-Roland Morris D...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e31811eab33
更新日期:2007-08-01 00:00:00