Abstract:
OBJECTIVE:A standard top-loading lumbar pedicle screw-rod system is compared with a pedicle screw-plate system with smaller-diameter screws, more medial entry, and lower profile to assess the relative stability, strength, and resistance to fatigue of the 2 systems. METHODS:Seven human cadaveric specimens were studied with each surgical construct. Nondestructive, nonconstraining pure moments were applied to specimens to induce flexion, extension, lateral bending, and axial rotation while recording L5-S1 motion optoelectronically. After initial tests, specimens were fatigued for 10,000 cycles and retested to assess early postoperative loosening. Specimens were then loaded to failure in hyperextension. RESULTS:The standard screw-rod construct reduced range of motion to a mean of 20% of normal, whereas the screw-plate construct reduced range of motion to 13% of normal. Differences between systems were not significant in any loading mode (P > 0.06). The 14% loosening of the screw-rod system with fatigue was not significantly different from the 10% loosening observed with the screw-plate system (P > 0.15). Mean failure loads of 30 Nm for screw-rod and 37 Nm for screw-plate were also not significantly different (P = 0.38). CONCLUSION:Posterior fixation at L5-S1 using the low-profile screw-plate system offers stability, resistance to fatigue, and resistance to failure equivalent to fixation using a standard cantilevered pedicle screw-rod system.
journal_name
Neurosurgeryjournal_title
Neurosurgeryauthors
Crawford NR,Doğan S,Yüksel KZ,Villasana-Ramos O,Soto-Barraza JC,Sawa AG,Porter RW,Marciano FF,Theodore Ndoi
10.1227/01.NEU.0000363701.76835.BFsubject
Has Abstractpub_date
2010-02-01 00:00:00pages
E404-6; discussion E406issue
2eissn
0148-396Xissn
1524-4040pii
00006123-201002000-00032journal_volume
66pub_type
杂志文章相关文献
NEUROSURGERY文献大全abstract::Neurosurgery as a specialty medical field is new in Jordan. This article documents the history, current status, and projected future of neurosurgery in Jordan. Resident training is also highlighted, and challenges for the future of the profession are presented. ...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-199807000-00086
更新日期:1998-07-01 00:00:00
abstract:BACKGROUND:Lesions in the insula and basal ganglia can be risky to resect because of their depth and proximity to critical structures, particularly in the dominant hemisphere. Transsylvian approaches shorten the surgical distance to these lesions, preserve perisylvian temporal and frontal cortex, and minimize brain tra...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/NEU.0b013e318236760d
更新日期:2012-04-01 00:00:00
abstract::A study was undertaken to determine how frequently angiographic vasospasm occurs outside the normal access range of transcranial Doppler ultrasound in patients who have suffered a subarachnoid hemorrhage. Vasospasm located in the basal vessels is readily identifiable using transcranial Doppler ultrasound whereas spasm...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:
更新日期:1990-10-01 00:00:00
abstract:OBJECTIVE:This case report is presented to raise the awareness of the potential risk of reactivation of herpes simplex virus (HSV) encephalitis after intracranial surgery. CLINICAL PRESENTATION:The case of an 8-year-old male patient who suffered a reactivation of HSV encephalitis after undergoing amygdalohippocampecto...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-199903000-00106
更新日期:1999-03-01 00:00:00
abstract:OBJECTIVE AND IMPORTANCE:We present a patient who experienced a subarachnoid hemorrhage secondary to a dissecting aneurysm of the right posteroinferior cerebellar artery (PICA). The use of an encircling clip in treating the aneurysm while preserving supply to brain stem perforators originating near the dissecting segme...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-199808000-00107
更新日期:1998-08-01 00:00:00
abstract::The computed tomographic (CT) scan has replaced angiography in the preoperative neurodiagnostic evaluation of the common pediatric posterior fossa tumors. This case report illustrates that rarely an atypical vascular anomaly may masquerade as a neoplasm and angiography must not be dismissed if the CT scan is any way a...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/00006123-198006000-00011
更新日期:1980-06-01 00:00:00
abstract:OBJECTIVE:Radical resection of facial nerve schwannomas classically implies a high risk of severe facial palsy. Owing to the rarity of facial palsy after gamma knife surgery (GKS) of vestibular schwannomas, functional evaluation after GKS seems rational in this specific group of patients. To our knowledge, no previous ...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/01.NEU.0000249282.46514.DA
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVE:We sought to describe a modified technique for the reduction and stabilization of unstable Jefferson fractures. CLINICAL PRESENTATION:We present the case of an isolated unstable Jefferson fracture in a 33-year-old woman. The patient was the victim of a motor vehicle accident. Her neurological examination was...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/01.neu.0000335022.91240.c9
更新日期:2008-07-01 00:00:00
abstract:BACKGROUND:FLOW 800 delivers a color-coded map for snapshot visualization of the temporal distribution dynamics after indocyanine green angiography with post hoc calculation of FLOW 800-specific hemodynamic parameters. However, the value of these parameters regarding quantitative flow assessment remains unclear. OBJEC...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/NEU.0000000000000277
更新日期:2014-06-01 00:00:00
abstract:OBJECTIVE:We have frequently observed the development of postoperative communicating hydrocephalus in patients undergoing decompressive hemicraniectomy. This condition may persist in some patients after cranioplasty and require permanent cerebrospinal fluid (CSF) diversion. To confirm an independent correlation between...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/01.NEU.0000290894.85072.37
更新日期:2007-09-01 00:00:00
abstract:BACKGROUND:The goals of treating Koos grade IV vestibular schwannomas are to relieve brainstem compression, preserve or restore neurological function, and achieve long-term tumor control while minimizing tumor- and treatment-related morbidity. OBJECTIVE:To propose a treatment paradigm involving the intentional near-to...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1093/neuros/nyx143
更新日期:2018-02-01 00:00:00
abstract:OBJECTIVE:We report our initial clinical experience with a new method for intraoperative blood flow assessment. The purposes of the study were to assess the use of indocyanine green (ICG) video angiography in neurovascular cases, to assess the handling and image quality, to compare the findings with postoperative angio...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-200301000-00017
更新日期:2003-01-01 00:00:00
abstract::A prospective analysis of cranioplasty, vertebral body replacement, and spinal fusion using tobramycin-impregnated methylmethacrylate in 65 patients is presented. Cranioplastic methacrylate (1 packet) was mixed with 1.2 g of powdered tobramycin and placed into the desired location. The polymer was irrigated with bacit...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-199106000-00001
更新日期:1991-06-01 00:00:00
abstract::Two cases of subdural hematoma, one acute and the other chronic, associated with cancer metastatic to the dura are reported. Various mechanisms of the association of hematomas with cancer are reviewed. ...
journal_title:Neurosurgery
pub_type: 杂志文章,评审
doi:10.1097/00006123-199010000-00019
更新日期:1990-10-01 00:00:00
abstract::During a 34-month period, 12 cases of delayed traumatic intracerebral hematoma (DTICH) were diagnosed among 162 consecutive prospectively studied patients admitted to the Medical College of Virginia with severe closed head injuries. All patients were unresponsive to command and unable to utter formed words at the time...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:
更新日期:1979-09-01 00:00:00
abstract:OBJECTIVE:To determine the clinical presentation and morbidity of the surgical management of peripheral nerve sheath tumors (PNSTs). METHODS:We performed a retrospective chart review of surgically treated PNSTs at the University of Miami between 1991 and 2008. RESULTS:There were a total of 140 cases, including 87 sch...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/01.NEU.0000367636.91555.70
更新日期:2010-04-01 00:00:00
abstract::Intracranial epidermoid and dermoid tumors are unusual benign lesions that are potentially curable. Subtotal removal carries a high incidence of recurrence, plus the rare possibility of carcinomatous degeneration of the remnants. Aseptic meningitis from spillage of cyst contents into the subarachnoid space is frequent...
journal_title:Neurosurgery
pub_type: 杂志文章,评审
doi:10.1227/00006123-198904000-00014
更新日期:1989-04-01 00:00:00
abstract:BACKGROUND:Brain metastases represent the most common intracranial tumors and are associated with very poor prognosis. OBJECTIVE:To investigate the feasibility, survival, and cerebral disease control of patients with singular brain metastases treated with stereotactic 125iodine brachytherapy (SBT), to identify prognos...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/NEU.0b013e31820b526a
更新日期:2011-05-01 00:00:00
abstract::We present seven patients with multilevel cervical spondylotic myelopathy and superimposed midline soft disc herniation who were treated by decompressive laminectomies of the spondylotic segments followed by transdural excision of the anteriorly located disc extrusion. There was no perioperative neurological morbidity...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/00006123-199404000-00010
更新日期:1994-04-01 00:00:00
abstract::The authors have reported a clinical trial of an autologous cervical sympathetic ganglion transplanted into the brain of a parkinsonian patient. A 45-year-old woman presented with bradykinesia and a gait disturbance for 8 years under L-dopa treatment. The patient underwent stereotactic transplantation of the right ste...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/00006123-199407000-00026
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVE:Surgical treatment of odontoid fractures that do not allow interfragmentary fracture compression involves either posterior atlantoaxial arthrodesis or additional anterior stabilization using a plate construct. The purpose of this study was to determine the clinical and radiographic outcome after anterior plat...
journal_title:Neurosurgery
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1227/01.NEU.0000339117.60613.8C
更新日期:2009-04-01 00:00:00
abstract::T-lymphocyte subpopulations (Tg or "suppressor cells" and Tm or "helper cells") in the peripheral blood of 16 patients with malignant intracranial gliomas were analyzed. The number of Tm-lymphocytes was very close to normal in both pre- and postoperative samples, whereas Tg-lymphocytes were significantly increased pre...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/00006123-198205000-00004
更新日期:1982-05-01 00:00:00
abstract::Intracisternal thrombolysis with recombinant tissue plasminogen activator (rtPA) was performed in 20 patients with aneurysmal subarachnoid hemorrhage. All patients had blood accumulations in the basal cisterns according to Fisher's Grade III, thus being at a high risk for the development of posthemorrhagic delayed isc...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/00006123-199206000-00010
更新日期:1992-06-01 00:00:00
abstract::An 8-year-old boy presented with acute proptosis of the right eye. Examination revealed 8 mm of exophthalmos, limitation of upward gaze, optic disc swelling, and normal visual acuity, but an inferonasal quadrantic visual field defect. Orbital ultrasound and computed tomographic scanning demonstrated a superotemporal t...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::The failure of most available treatment modalities to improve the survival time and the quality of survival in patients with gliomas calls for the intense biological analysis of glial neoplasia. The untimely activation of cellular protooncogenes is often related to the process of neoplasia. Several protein growth fact...
journal_title:Neurosurgery
pub_type: 杂志文章,评审
doi:10.1097/00006123-198911000-00001
更新日期:1989-11-01 00:00:00
abstract:OBJECTIVE:The angle of arteries at bifurcations, as well as the blood flow, are factors of hemodynamic stress on the apical region, where aneurysms often develop. Using images obtained with three-dimensional computed tomographic angiography, we sought to determine the angles between the A1 and A2 segments of the anteri...
journal_title:Neurosurgery
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00006123-199907000-00021
更新日期:1999-07-01 00:00:00
abstract:OBJECTIVE:The supraorbital approach is well accepted for lesions in the anterior fossa, the sellar region, and the anterior circle of Willis. However, the usefulness of this approach has not yet been elucidated for lesions in the interpeduncular fossa. The technique of an endoscope-assisted, ipsi- and contralateral sup...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-199901000-00062
更新日期:1999-01-01 00:00:00
abstract:OBJECTIVE AND IMPORTANCE:We report an unusual case of basal ganglia granulomas caused by Candida albicans that surrounded the proximal segment of a nonfunctional cerebrospinal fluid shunt in a previously healthy patient. CLINICAL PRESENTATION:A 22-year-old woman had undergone ventriculoatrial cerebrospinal fluid shunt...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1097/00006123-200010000-00037
更新日期:2000-10-01 00:00:00
abstract:BACKGROUND:Joint-distraction and intra-operative manipulation surgeries to correct basilar invagination (BI) and atlantoaxial dislocation (AAD) are becoming standard procedures. However, current data are unable to aid in the understanding of normal and abnormal morphology of the C1/C2 joints. OBJECTIVE:To study variou...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1227/NEU.0000000000000470
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND:Minimal clinically important difference (MCID) is determined when a patient or physician defines the minimal change that outweighs the costs and untoward effects of a treatment. These measurements are "anchored" to validated quality-of-life instruments or physician-rated, disease-activity indices. To capture...
journal_title:Neurosurgery
pub_type: 杂志文章
doi:10.1093/neuros/nyaa490
更新日期:2020-12-28 00:00:00