Abstract:
STUDY DESIGN:A three-dimensional, nonlinear finite element analysis was performed to predict the in situ contact interaction of prosthesis components of the Prodisc-L in a multisegmental lumbar model following total disc replacement (TDR). OBJECTIVE:Efforts were made to investigate how the TDR implant contact characteristics could affect the 3-dimensional kinematics, facet loads of the lumbar spine following TDR. SUMMARY OF BACKGROUND DATA:Although spinal motion analyses of human lumbar cadaveric models after Prodisc TDR have been widely studied, the interaction of the disc prosthesis, particularly its in situ contact mechanics, is never known. METHODS:A validated intact multisegmental lumbar finite element model L2-L4 was altered to accommodate the TDR prosthesis through anterior approach. At L3-L4 disc space, the Prodisc-L of 6 degrees lordosis angle was implanted centrally. The model was subjected to compressive preload and pure moments to create flexion, extension, lateral bending, and axial rotation motion in physiologic range. The contact interaction between the superior component of Prodisc-L and the UHMWPE inlay were assessed in terms of contact region (CR), contact area (CA), and contact pressure (CP). Parameters of range of motion (ROM) and facet loading transfer were simultaneously analyzed and compared with those of the intact model. RESULTS:The predicted contact area was 3.5 times larger in flexion than that observed in extension, whereas the maximum contact pressure in the disc articulation was very similar with 15.1 MPa for flexion and 14.5 MPa for extension. Joint surface incongruence was developed in extension motion. The implanted model exhibited a 91.4% increase in ROM accompanied by a 150.6% rising in facet force during extension, while the flexion motion showed the least effects of TDR. In lateral bending and axial rotation, the abnormal joint "lift off" was not seen. CONCLUSION:The in situ function of the TDR prosthesis was highly dependent on how well the device could incorporate itself into the mechanical environment in the disc space, which has been determined by the rest of the spinal structures, including the retained disc anulus, articular facets, ligaments, vertebrae, and muscular stabilizers. The different contact interaction of the artificial disc components revealed here could be attributed to the violation of this mechanical environment which, in turn, may bring adverse effects to those spinal elements.
journal_name
Spine (Phila Pa 1976)journal_title
Spineauthors
Chen WM,Park C,Lee K,Lee Sdoi
10.1097/BRS.0b013e3181ae23d1subject
Has Abstractpub_date
2009-09-15 00:00:00pages
E716-23issue
20eissn
0362-2436issn
1528-1159pii
00007632-200909150-00002journal_volume
34pub_type
杂志文章相关文献
SPINE文献大全abstract:STUDY DESIGN:This study determined bone mineral density (BMD) of cervical, thoracic, and lumbar vertebrae in healthy asymptomatic human subjects. OBJECTIVES:To test the hypothesis that BMD of neck vertebrae (C2-C7) is equivalent to BMD of lumbar vertebrae (L2-L4). SUMMARY OF BACKGROUND DATA:BMD of lumbar vertebrae is...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000192684.12046.93
更新日期:2006-01-01 00:00:00
abstract:STUDY DESIGN:This is a case report of a posterior extrusion of the polyethylene core from a CHARITÉ arthroplasty. This is the first reported case of posterior dislocation of the polyethylene and the revision strategies used to correct this problem. OBJECTIVE:To report a novel failure mechanism and revision strategy fo...
journal_title:Spine
pub_type: 杂志文章,评审
doi:10.1097/BRS.0b013e3181e9bf30
更新日期:2010-11-15 00:00:00
abstract::A retrospective review of 20 patients treated nonoperatively for burst fractures of the lumbar spine (L2-L5) was performed. All patients were neurologically intact at the time of injury. Follow-up averaged 3.9 years with a range of 2.1 to 9.1 years. Fourteen patients were men and six were women. The average age at inj...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199303000-00002
更新日期:1993-03-01 00:00:00
abstract:STUDY DESIGN:A case report and review of the literature are presented. OBJECTIVE:To describe an unusual location for a cervical synovial cyst and to review characteristic presentations and findings of synovial cysts in the cervical spine. SUMMARY OF BACKGROUND DATA:Synovial cysts in the cervical spine are rare. To da...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.BRS.0000090501.42188.2A
更新日期:2003-09-01 00:00:00
abstract:STUDY DESIGN:Case report. OBJECTIVE:To provide additional information on possible relations between uterine and spinal manifestations of leiomyosarcoma. SUMMARY OF BACKGROUND DATA:Spinal metastases and primary spinal manifestation of leiomyosarcoma and other malignant smooth muscle tumors are rarely observed. METHOD...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199905150-00011
更新日期:1999-05-15 00:00:00
abstract:STUDY DESIGN:Prospective, randomized, controlled study. OBJECTIVE:To report the results of using the PediGuard (SpineGuard, Inc., San Francisco, CA), a local electrical conductivity measurement device, to reduce radiation exposure while drilling the pilot hole for pedicle screw placement. SUMMARY OF BACKGROUND DATA:R...
journal_title:Spine
pub_type: 杂志文章,随机对照试验
doi:10.1097/BRS.0b013e3182666adc
更新日期:2012-10-01 00:00:00
abstract::A traditional teaching in orthopaedic surgery has been that, in cases of fusion for L4-5 discopathy or instability, one must include the lumbosacral joint. There is nothing in the literature to support this time-honored dictum. The senior author, among others, has rejected this concept; and, the authors are, therefore...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198904000-00022
更新日期:1989-04-01 00:00:00
abstract:STUDY DESIGN:A retrospective study was undertaken which evaluated the medical records and imaging studies of a subset of patients managed by the spine service at Jackson Memorial Hospital who were diagnosed with an esophageal perforation in the setting of spinal surgery. OBJECTIVE:To assess the safety and efficacy of ...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000182309.97403.ca
更新日期:2005-10-15 00:00:00
abstract::A retrospective review of 326 female patients with untreated idiopathic scoliosis was performed to determine what factors might be useful in predicting the risk of curve progression. Components such as family history, height-weight ratio, lumbosacral transitional anomalies, kyphosis, lordosis, and trunk balance were n...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198610000-00003
更新日期:1986-10-01 00:00:00
abstract:STUDY DESIGN:Retrospective radiographical review. OBJECTIVE:To evaluate the outcome of selective thoracic fusion (STF) by using the Guan-Din method for the treatment of major thoracic compensatory lumbar (MTCL) curves. SUMMARY OF BACKGROUND DATA:Performing STF for MTCL curves is to minimize the loss of lumbar motion ...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000111
更新日期:2014-02-15 00:00:00
abstract:STUDY DESIGN:Retrospective cohort analysis of prospectively collected clinical data. OBJECTIVE:To compare outcomes of elective spine fusion and laminectomy when performed by neurological and orthopedic surgeons. SUMMARY OF BACKGROUND DATA:The relationship between primary specialty training and outcome of spinal surge...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000489
更新日期:2014-09-01 00:00:00
abstract:STUDY DESIGN:Retrospective case series. OBJECTIVE:Our goal was to assess whether en bloc resection had an impact on survival. SUMMARY OF BACKGROUND DATA:Osteogenic sarcoma occurs rarely in the mobile spine, but when it does, the prognosis is poor. Wide resection is recommended for osteogenic sarcoma of the extremitie...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e31822fb1a7
更新日期:2012-03-15 00:00:00
abstract:STUDY DESIGN:Retrospective register-based study using Swedish registers and data prospectively collected in quality register Swespine. OBJECTIVE:Analyze the association of societal costs and spine surgery outcome in low back pain (LBP) patients based on patient reported outcome measures (PROMs). SUMMARY OF BACKGROUND...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003050
更新日期:2019-09-01 00:00:00
abstract:STUDY DESIGN:The results from cervical laminoplasty in 18 patients with diabetes mellitus were compared with results from the same procedure in 34 nondiabetic patients matched for age, gender, and disease. OBJECTIVE:To analyze the effects of diabetes mellitus on the surgical outcome after cervical laminoplasty. SUMMA...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-200003010-00004
更新日期:2000-03-01 00:00:00
abstract:STUDY DESIGN:A case report of a patient suffering from an intradural herniated disc associated with the presence of epidural gas. OBJECTIVE:To advise spine surgeons of the possible association of intradural disc herniation and epidural gas, to prevent overlooking intradural disc fragments during surgery. SUMMARY OF B...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199801150-00027
更新日期:1998-01-15 00:00:00
abstract:STUDY DESIGN:Retrospective database review OBJECTIVE.: The aim of this study was to analyze the implications of solid organ transplant (SOT) on postoperative outcomes following elective one or two-level anterior cervical discectomy and fusion (ACDF). SUMMARY OF BACKGROUND DATA:Although SOTs have been associated with i...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003230
更新日期:2020-02-01 00:00:00
abstract::The biomechanical evaluation of a cervical spine implant must include flexural and torsional testing if it is used for stabilizing a traumatic unstable motion segment. A cadaveric model is presented that allows flexural and torsional testing of a cervical spine motion segment, measuring the tilting angle, the translat...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199103001-00003
更新日期:1991-03-01 00:00:00
abstract:STUDY DESIGN:A case of cervical myelopathy with a severe nape and upper arm pain caused by anomalous bilateral vertebral arteries is reported. OBJECTIVE:To report over six and a half years results of a microsurgical decompression for high cervical myelopathy with a severe pain of nape and upper arm resulting from spin...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e31817c6c17
更新日期:2008-08-01 00:00:00
abstract:STUDY DESIGN:Trunk list was measured using three different techniques to compare accuracy, precision, and ease of use. OBJECTIVE:To obtain a reproducible technique for further studies of the nature, cause, and clinical relevance of trunk list. SUMMARY OF BACKGROUND DATA:Gravity-induced trunk list is a clinical sign t...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199607150-00011
更新日期:1996-07-15 00:00:00
abstract::By measurement of intradiscal pressure in vitro, the hydrostatic properties of the nucleus pulposus of normal lumbar intervertebral disc were proven. The hydrodynamic properties seem to exist also in the somewhat degenerated disc, but not in the more severely deranged ones. Intravitally-performed measurements of disc ...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-198101000-00020
更新日期:1981-01-01 00:00:00
abstract::The authors carried out successful total sacrectomy in three cases, two with giant cell tumors and one with a chordoma. The anterior and posterior approach is feasible for resecting huge sacral tumors en bloc, but it is important to reconstruct the continuity between the pelvic ring and spinal column using spinal inst...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199011010-00024
更新日期:1990-11-01 00:00:00
abstract:STUDY DESIGN:Case report. OBJECTIVE:To describe a rare case of tenosynovial giant cell tumor, diffuse type/pigmented villonodular synovitis (PVNS) in a pars defect in a patient with lumbar spondylolysis. SUMMARY OF BACKGROUND DATE:PVNS rarely occurred in lumbar spine, and no studies in the English literature have rep...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000000923
更新日期:2015-06-15 00:00:00
abstract:STUDY DESIGN:Retrospective review of patient records with current clinical and radiographic assessment. OBJECTIVE:To evaluate the long-term result of anterior and posterior convex spinal growth arrest, with or without instrumentation, in managing infantile idiopathic scoliosis. SUMMARY OF BACKGROUND DATA:There were 1...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199608150-00010
更新日期:1996-08-15 00:00:00
abstract:STUDY DESIGN:Retrospective chart review of prospectively collected data from 2 nonrandomized, nonconcurrent cohorts. OBJECTIVE:Early results of 2 lumbar interbody fusion procedures-open posterior lumbar interbody fusion (PLIF) and minimally invasive (extreme lateral interbody fusion [XLIF])-were compared in octogenari...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0b013e3182023796
更新日期:2010-12-15 00:00:00
abstract:STUDY DESIGN:Pain drawings were scored and their relationship to discographic pain responses was investigated. OBJECTIVES:The purpose of this study was to determine if there was a relationship between patients indicating pain in nonanatomic patterns on pain drawings (possibly suggestive of a tendency to overreport pai...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199503150-00015
更新日期:1995-03-15 00:00:00
abstract:STUDY DESIGN:Pedicle screw fixation for unstable thoracolumbar spine injuries is relatively new. The effect of one or two crosslinks on rotational and lateral bending stiffness was studied. OBJECTIVE:To determine the rotational and bending stiffness values of thoracolumbar fractures fixed by the AO's internal fixation...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/00007632-199707150-00007
更新日期:1997-07-15 00:00:00
abstract:STUDY DESIGN:An anatomical study in fifteen cadavers. OBJECTIVE:To observe the anatomical relationship of the extrapedicular puncture approach with the spinal nerve and its branches, evaluate the risk of injury to these nerves and recommend a safe puncture path for lumbar extrapedicular percutaneous vertebroplasty (PV...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003947
更新日期:2021-01-08 00:00:00
abstract:STUDY DESIGN:A prospective longitudinal study with 1-year follow-up. SUMMARY OF BACKGROUND DATA:Little is known about the consequences of having back pain and the patterns underlying the decisions to use medical care. OBJECTIVES:The aim of this study is to describe care utilization for low back pain (LBP) and to inve...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/01.brs.0000127188.58944.1e
更新日期:2004-06-15 00:00:00
abstract:STUDY DESIGN:A retrospective study. OBJECTIVE:The aim of this study was to identify the relationships between radiological findings and the presence of stooping in lumbar degenerative kyphosis (LDK). SUMMARY OF BACKGROUND DATA:Many studies have addressed fixed sagittal imbalances and surgical treatments. However, inf...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000002363
更新日期:2018-04-15 00:00:00
abstract:STUDY DESIGN:Retro-prospective study. OBJECTIVES:To identify the incidence and the risk factors associated with the development of Facial pressure ulcers (FPU) in patients underwent spine surgery in prone position for at least 3 hours. SUMMARY OF BACKGROUND DATA:FPU is a serious complication that can occur after prol...
journal_title:Spine
pub_type: 杂志文章
doi:10.1097/BRS.0000000000003892
更新日期:2020-12-17 00:00:00