Using Magnetic Resonance Imaging to Characterize Pedicle Asymmetry in Both Normal Patients and Patients With Adolescent Idiopathic Scoliosis

Rajwani, T.; Bagnall, K. M.; Lambert, R.G.; Videman, Tapio; Kautz, J.; Moreau, Marc; Mahood, James; Raso, V.J.; Bhargava, Ravi

doi:10.1097/01.brs.0000120507.36611.8d

Cited by 23 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We did not statistically analyze the parameters' difference between different genders. Second, all measurements were made from MRI images, which provides for a good evaluation of the vertebral morphology, 6,7 although computer tomography provides finer evaluation of the bony anatomy at the cost of radiation exposure to the patient. Finally, the sample size is relatively small; however, we were limited by the number of patients who had straight normal spines and had an MRI.…”

Section: Discussionmentioning

confidence: 99%

Morphometric Analysis of Vertebral Growth Using Magnetic Resonance Imaging in the Normal Skeletally Immature Spine

Zhang

Sucato

Nurenberg

et al. 2018

Spine

View full text Add to dashboard Cite

The current study established the growth of the pedicle, spinal canal, and vertebral body in vivo in a sample of normal pediatric subjects. The vertebral growth rate in the infantile and the juvenile-young period was significantly greater than that in the juvenile-old period. Spinal canal growth is associated with the growth of the pedicle width and has little growth after the juvenile-young period. Pedicle screw fixation would be unlikely to influence the size of the spinal canal after the early juvenile period, but may disturb the pedicle growth in length.

show abstract

Section: Discussionmentioning

confidence: 99%

Morphometric Analysis of Vertebral Growth Using Magnetic Resonance Imaging in the Normal Skeletally Immature Spine

Zhang

Sucato

Nurenberg

et al. 2018

Spine

View full text Add to dashboard Cite

show abstract

“…O'Brien et al used computed tomography (CT) scans in measuring the width of 512 pedicles in patients with adolescent idiopathic scoliosis (AIS) and found no correlation between age, Risser grade, curve magnitude, axial rotation, and pedicle morphology 34 . Rajwani et al used magnetic resonance imaging (MRI) to evaluate the width of eighty pedicles in patients with AIS and found no correlation between pedicle morphology and location along the convexity or concavity of the curve 30 .…”

mentioning

confidence: 99%

“…The authors of a number of studies have reviewed normal and deformed spines to better understand pedicle morphology [24][25][26][27][28][29][30][31][32] . Parent et al used three-dimensional reconstructions to assess vertebrae in normal and deformed spinal osteologic specimens 33 .…”

mentioning

confidence: 99%

Prevalence, Distribution, and Surgical Relevance of Abnormal Pedicles in Spines with Adolescent Idiopathic Scoliosis vs. No Deformity

Sarwahi

Sugarman

Wollowick

et al. 2014

The Journal of Bone and Joint Surgery

View full text Add to dashboard Cite

show abstract

“…Some studies reported inter and intra observer differences during measurements of sagittal spine curvatures [21][22][23]. The differences are due to the inherent anatomical variants that alters the normal spine symmetry from side-to-side [24,25]. In idiopathic scoliosis, asymmetry is primarily demonstrated by vertebral wedging.…”

Section: Introductionmentioning

confidence: 99%

Influence of implant rod curvature on sagittal correction of scoliosis deformity

et al. 2014

View full text Add to dashboard Cite

PURPOSE:To analyze the changes of implant rod angle of curvature during surgery and establish its influence on sagittal correction of scoliosis deformity. STUDY DESIGN:A retrospective analysis of the preoperative and postoperative implant rod geometry and angle of curvature was conducted.PATIENT SAMPLE: Twenty adolescent idiopathic scoliosis patients underwent surgical operation. Average age at the time of operation was 14 years. OUTCOME MEASURES:The preoperative and postoperative implant rod angle of curvature expressed in degrees was obtained for each patient. METHODS:Two implant rods were attached to the concave and convex side of the spinal deformity. The preoperative implant rod geometry was measured before surgical implantation.The postoperative implant rod geometry after surgery was measured by Computed Tomography scanner. The implant rod angle of curvature at the sagittal plane was obtained from the implant rod geometry. The angle of curvature between the implant rod extreme ends was measured before implantation and after surgery. The sagittal curvature between the corresponding spinal levels of healthy adolescents obtained by previous studies was compared to the implant rod angle of curvature to evaluate the sagittal curve correction. The difference between the postoperative implant rod angle of curvature and normal spine sagittal curvature of the corresponding instrumented level was used to evaluate over or under correction of the sagittal deformity.Page | 3 RESULTS:The implant rods at the concave side of deformity of all patients were significantly deformed after surgery. The average degree of rod deformation Δθ at the concave and convex side was 15.8 deg. and 1.6 deg., respectively. The average preoperative and postoperative implant rod angle of curvature at the concave side was 33.6 deg. and 17.8 degrees, respectively. The average preoperative and postoperative implant rod angle of curvature at the convex side was 25.5 degrees and 23.9 degrees, respectively. A significant relationship was found between the degree of rod deformation and preoperative implant rod angle of curvature (r = 0.60, p < 0.005). The implant rods at the convex side of all patients did not have significant deformation. The results indicate that the postoperative sagittal outcome could be predicted from the initial rod shape. CONCLUSIONS:Changes in implant rod angle of curvature may lead to over or under correction of the sagittal curve. Rod deformation at the concave side suggests that corrective forces acting on that side are higher than the convex side.

show abstract

Using Magnetic Resonance Imaging to Characterize Pedicle Asymmetry in Both Normal Patients and Patients With Adolescent Idiopathic Scoliosis

Cited by 23 publications

References 14 publications

Morphometric Analysis of Vertebral Growth Using Magnetic Resonance Imaging in the Normal Skeletally Immature Spine

Morphometric Analysis of Vertebral Growth Using Magnetic Resonance Imaging in the Normal Skeletally Immature Spine

Prevalence, Distribution, and Surgical Relevance of Abnormal Pedicles in Spines with Adolescent Idiopathic Scoliosis vs. No Deformity

Influence of implant rod curvature on sagittal correction of scoliosis deformity

Contact Info

Product

Resources

About