Publications by authors named "Fethi Laouissat"
Study Design: Retrospective multicenter study.
Objective: Our objective was to compare the spline-based measurement of sagittal spinal curvatures to fixed landmarks in a normative population.
Summary Of Background Data: Recent research has stressed the importance of considering sagittal curvature in its entirety using a spline reconstruction.
Study Design: National cross-sectional study.
Objective: Thoracic kyphosis (TK) is related to sagittal parameters as pelvic tilt (PT), lumbar lordosis (LL) and pelvic incidence (PI). The equation TK = 2 (PT+LL-PI) was validated for adolescents.
Study Design: Data collection of radiological parameters in non-pathological adult spines.
Objectives: Establishing a baseline database for measurements of the spinal lordosis ratio between upper and lower arcs of the lumbar spine unique to each type of spine described by Roussouly's classification. Illustrating the importance of correct rationing of the upper and lower arcs.
Article Synopsis
- The study was a retrospective cross-sectional analysis aimed at understanding how pelvic incidence (PI) and age influence spinopelvic alignment types, comparing results between pediatric and adult groups according to the Roussouly classification.
- A total of 1,706 non-pathologic individuals aged 5-49 were examined using radiographs, revealing significant differences in global and spinopelvic alignment parameters as individuals grow, particularly noting that certain alignment types are less common in younger populations.
- The findings concluded that global and spinopelvic alignment evolves throughout growth, with specific trends in pelvic incidence observed, particularly highlighting that Type 4 alignment shows the largest increase in PI with age.
Study Design: Retrospective cross-sectional study.
Objective: The aim was to describe existing global sagittal alignment parameters across ages and to analyze differences according to gender and pelvic incidence (PI).
Summary Of Background Data: Variability with age has been reported.
Study Design: Descriptive radiographic analysis of a prospective multi-center database.
Objective: This study aims to provide normative values of spinopelvic parameters and their correlations according to age and pelvic incidence (PI) of subjects without spinal deformity.
Methods: After Institutional Review Board (IRB) approval, 1540 full spine radiographs were analyzed.
Purpose: The aim was to describe radiographic cervical sagittal alignment variations according to age, gender and pelvic incidence (PI) and to investigate relationships with thoracic alignment.
Methods: A total of 2599 individuals (5-93 years) without spinal deformity were studied. Cranial cervical parameters were: McGregor slope, occipita-C2 angle, McGregor-C2 lordosis and C1-C2 lordosis.
Purpose: Regarding the close interaction between the spinal balance and the pelvis orientation no parameter is routinely used to describe and to evaluate the global spinopelvic balance, taking into account simultaneously the spinal part and the pelvic part of the global alignment. The global tilt was described to analyze malalignment, considering spinal and pelvic imbalance together. From a geometrical point of view, the global tilt is the sum of the C7 vertical tilt and the pelvic tilt.
View Article and Find Full Text PDFObjective: The objective of this retrospective study is to identify the best immediate postoperative radiological predictors for the occurrence of proximal junctional kyphosis (PJK). Four proposed methods will be explored.
Methods: A homogeneous database of adult scoliosis from multiple centers was used.
Purpose: Although the Roussouly classification of common variants in spinal sagittal alignment is well accepted, no studies have implemented it in an asymptomatic adult population. In addition, no study investigated the radiographic features of asymptomatic patients with an anteverted pelvis. The aim of this prospective radiographic study of 296 asymptomatic adults without spinal pathology was to investigate how the Roussouly classification could include the anteverted pelvis concept.
View Article and Find Full Text PDFStudy Design: A case series of seven consecutive patients with L5-S1 spondyloptosis (SPP) and Meyerding IV spondylolisthesis (HGSPL) treated consecutively by a new surgical technique with partial reduction and fixation after spinal shortening.
Objective: To report clinical and radiological outcomes of a spinal shortening procedure by a single posterior approach in seven patients with HGSPL and SPP.
Background Data: The surgical treatment of L5-S1 SPP and HGSPL remains challenging, and numbers of surgical treatment options have been described with several principles.