Search Results

You are looking at 41 - 50 of 482 items for :

  • "sagittal alignment" x
Clear All
Restricted access

Renaud Lafage, Ibrahim Obeid, Barthelemy Liabaud, Shay Bess, Douglas Burton, Justin S. Smith, Cyrus Jalai, Richard Hostin, Christopher I. Shaffrey, Christopher Ames, Han Jo Kim, Eric Klineberg, Frank Schwab, Virginie Lafage and the International Spine Study Group

levels above UIV. Statistical Analysis The collected demographic, surgical, and radiographic data were described and analyzed at baseline and immediate postoperative follow-up. Changes in radiographic alignment were also investigated, including a preoperative to postoperative analysis of sagittal alignment and the rate of radiographic PJK. Patients were stratified into 5 groups based on the preoperative to postoperative degree of change in LL: decrease in LL (kyphotic change > 5°), stable (change between −5° and 5°), 5°–15° increase (lordotic change of 5°–15°), 15

Full access

Charles H. Crawford III, Steven D. Glassman, Jeffrey L. Gum and Leah Y. Carreon

A dvancements in the understanding of adult spinal deformity have led to an increased focus on sagittal alignment. 4 Pelvic incidence has emerged as a key radiographic measurement that should closely match ideal lumbar lordosis. 3 , 7 As proper measurement of the pelvic incidence requires accurate identification of the S-1 endplate, lumbosacral transitional anatomy 1 may lead to errors. The current case highlights one of the potential complications that can be avoided with awareness. Case Report This 61-year-old man presented with symptomatic

Restricted access

Sang-Ho Lee, Byung-Uk Kang, Sang Hyeop Jeon, Jong Dae Park, Dae Hyeon Maeng, Young-Geun Choi and Won-Chul Choi

the study design, made an assessment regarding fusion, subsidence, and factors associated with spinal sagittal alignment. Successful radiologically based fusion was confirmed according to the following criteria: the absence of radiographic motion of more than 5° on the dynamic radiographs, absence of radiolucencies around a large area of the cages, and absence of implant failure. 41 In this study, changes in segmental lordosis, whole lumbar lordosis, and sacral tilt were used as parameters to evaluate sagittal alignment after the inter-body fusion. Those parameters

Restricted access

Sharon C. Yson, Edward Rainier G. Santos, Jonathan N. Sembrano and David W. Polly Jr.

adjacent-segment degeneration. It is particularly important to obtain good sagittal alignment when performing single- or multilevel fusions for degenerative lumbar conditions, as arthrodesis in kyphosis can lead to premature adjacent-level degeneration and loss of overall sagittal balance with limited or no ability to compensate. The technique of TLIF has gained popularity in recent years because circumferential fusion is attained via a single posterior approach. It avoids complications associated with ALIF, which include retrograde ejaculation, deep venous thrombosis

Restricted access

Steven W. Hwang, Amer F. Samdani, Mark Tantorski, Patrick Cahill, Jason Nydick, Anthony Fine, Randal R. Betz and M. Darryl Antonacci

and C-7 plumb lines. The Risser score; proximal thoracic, main thoracic, and lumbar curve magnitudes; pelvic incidence; sacral slope; pelvic tilt; and pelvic obliquity were also recorded. Radiographic Data Various techniques for measuring cervical alignment have been described, but because of the clarity of the radiographs, we chose the inferior endplates of C-2 and C-7 as markers. Sagittal alignment of the thoracic spine was measured using the Cobb method from the superior endplate of T-2 and the inferior endplate of T-12; the superior endplate of T-12 and

Restricted access

Blake N. Staub, Renaud Lafage, Han Jo Kim, Christopher I. Shaffrey, Gregory M. Mundis Jr., Richard Hostin, Douglas Burton, Lawrence Lenke, Munish C. Gupta, Christopher Ames, Eric Klineberg, Shay Bess, Frank Schwab, Virginie Lafage and the International Spine Study Group

M uch has been written on the relationship between patient-reported outcomes and sagittal alignment in thoracolumbar deformities. 5–8 , 12 , 17 , 18 , 23 Although simple equations were initially used to identify thoracolumbar deformities, more recently, patient-specific formulas have been developed to more specifically quantify each deformity. 10 , 22 However, cervical spine studies have yet to define a fundamental equation, let alone patient-specific descriptors, that both elucidate a deformity and suggest a nidus for correction. The cervical sagittal

Restricted access

Hironobu Sakaura, Tomoya Yamashita, Toshitada Miwa, Kenji Ohzono and Tetsuo Ohwada

has been our standard procedure for all patients with 2-level DS since 2005. Therefore, with the least bias in determination of operative procedure, the present study reports clinical and radiological outcomes after 2-level PLIF for 2-level DS. In the present study, the mean JOA score–based recovery rate in the patients treated with 2-level PLIF was 51.8%; solid spinal fusion was achieved in 95.0% of these patients, and the mean sagittal alignment of the lumbar spine was more lordotic than before surgery. There has been only one small clinical case series study

Restricted access

George J. Kaptain, Nathan E. Simmons, Robert E. Replogle and Louis Pobereskin

than before your surgery? 28 (62) Knowing what you know now, would you choose to have surgery again? 36 (80) Did surgery help your problems? 31 (69) Radiographic Evaluation Radiographic studies were obtained in all patients whenever possible. Unfortunately, radiographic files are destroyed if they remain inactive for 2 years, and this policy significantly reduced the number of patients in the study group. Radiographs were assessed for sagittal alignment by the method outlined by Katsumi and colleagues. 24 Three categories were

Restricted access

Charles Kuntz IV, Linda S. Levin, Stephen L. Ondra, Christopher I. Shaffrey and Chad J. Morgan

upright sagittal occiput–pelvis alignment in asymptomatic adults. Although the undulating lordotic and kyphotic regional curves vary widely from the occiput to the pelvis in asymptomatic adults, sagittal spinal balance is maintained in a narrower range for alignment of the spine over the pelvis and femoral heads. References 1 Boulay C , Tardieu C , Hecquet J , Benaim C , Mouilleseaux B , Marty C , : Sagittal alignment of spine and pelvis regulated by pelvic incidence: standard values and prediction of lordosis . Eur Spine J 15 : 415 – 422

Restricted access

Hideki Sudo, Itaru Oda, Kuniyoshi Abumi, Manabu Ito, Yoshihisa Kotani and Akio Minami

these issues. The objectives of this study were to compare the biomechanical effects of five different posterior lumbar reconstruction models on the adjacent segments and to analyze the effects of three specific factors: construct stiffness, sagittal alignment, and the number of the fused segments. Materials and Methods Specimens and Experimental Setup We tested 10 cadaveric specimens of calf lumbar spines (from L-3 to the sacrum, obtained in 8–10-week-old calves). To exclude specimens with abnormalities or degenerative changes, anteroposterior and lateral