Untitled

Schwend, Richard M.; Sluyters, Romuald; Najdzionek, Jan

doi:10.1097/00007632-200303150-00006

Cited by 7 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CT studies show the ideal entry point of the iliac screw, to obtain the most length and to minimize perforations, should be within the medial portion of a zone 20 mm cranial and 10 mm caudal of the PSIS. 17,18 The trajectory is 22° lateral in the transverse plane and 25° caudal in the sagittal plane. 16,18,19 The average length of this screw has been reported as 124 to 150 mm.…”

Section: Resultsmentioning

confidence: 99%

Anatomic Parameters for Instrumentation of the Sacrum and Pelvis: A Systematic Review of the Literature

et al. 2018

View full text Add to dashboard Cite

Introduction:Multiple cadaver and radiographic analyses have been performed to define the surgical anatomy of the sacrum and pelvis. We provide a comprehensive review of this information, creating an accurate anatomic guide for practice and research.Methods:A systematic review was performed to identify publications citing sacral or iliac morphometric parameters based on cadaver or radiographic anatomy.Results:A total of 780 abstracts were evaluated. Fifty-six articles were included for final review and grouped into four sections: (1) bone density, (2) bony corridors, (3) screw length and trajectory, and (4) neurovascular and alimentary anatomy.Conclusion:A systematic analysis of the radiographic and gross anatomic features of the sacrum has yet to be published. This review includes details on the spatial arrangement of the S1 and S2 pedicle screws, sacroiliac screws, iliac screws, S2 alar iliac screws, and pelvic neurovascular anatomy. The study can be referenced by clinicians for sacral dissection, implant application, and ongoing advances in orthopaedic research.Study Design:Systematic reviewLevel of Evidence:Level IV

show abstract

Section: Resultsmentioning

confidence: 99%

Anatomic Parameters for Instrumentation of the Sacrum and Pelvis: A Systematic Review of the Literature

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Berry et al [15] believed that the optimal entrance point is the PSIS, whereas Schwend et al [16] believed that the screws should enter below the PSIS. By contrast, Schildhauer et al [11] believed that entry above the PSIS is more ideal.…”

Section: Discussionmentioning

confidence: 99%

Radiographic study of iliac screw passages

et al. 2014

View full text Add to dashboard Cite

BackgroundThe optimal iliac screw path was determined to provide references for lumbosacral-pelvic reconstruction.MethodsRadiographic data of 100 patients with normal pelvis were selected for this study. Four paths were designed. Paths A, B, and C were from the starting point of the crossing point of the chiotic line and posterior iliac crest (CLIC, located at 24.0 mm above the posterior superior iliac spine) to the upper edge of the acetabulum, anterior inferior iliac spine, and acetabulum center, respectively. Path D was from the starting point of the posterior superior iliac spine to the anterior inferior iliac spine. The lengths of the different paths of screw passage and bone plate thicknesses of two narrow places were measured and analyzed.ResultsPaths A, B, and D were approximately equal in length, but the thickness of the iliac plate in path A was significantly thicker than those in paths B and D. No significant difference was found between the iliac thickness of paths A and C, but the passage length of path A was significantly longer than that of path C.ConclusionPath A had the longest passage length and thickest iliac plate and could accommodate the relatively longest and thickest iliac screw. Thus, path A was the optimal iliac screw passage.

show abstract

“…The construct with an intrasacral screw is more stable than that with an intrasacral rod against pull- and/or back-out forces because the screw threads interdigitate with the subchondral bone under iliac buttress coverage with the dorsal and ventral cortex of the sacrum. Kuklo et al [4] reported a similar modification of the Galveston iliac rod to the screw and Schwend et al [9] performed a mechanical test in a cadaver model and demonstrated that iliac screws were more than three times stronger than iliac rods.…”

Section: Discussionmentioning

confidence: 99%

Lumbosacral fixation using sacroiliac buttress screws: a modification to the Jackson technique with intrasacral rods

et al. 2014

View full text Add to dashboard Cite

BackgroundThe use of intrasacral rods has been previously reported for posterior lumbosacral fixation. However, problems associated with this technique include poor stability of the rod in the sacrum, difficulty in contouring the rod to fit the lateral sacral mass, and the complicated assembly procedure for the rod and pedicle screws in the thoracolumbar segments after insertion of the rod into the sacrum.MethodsWe used a screw with a polyaxial head instead of an intrasacral rod, which was inserted into the lateral sacral mass and assembled to the rod connected cephalad to pedicle screws. The dorsal side of the screw was stabilized by the sacral subchondral bone at the sacroiliac joint with iliac buttress coverage, and the tip of the screw was anchored by the sacral cortex.ResultsThree different cases were used to illustrate lumbosacral fixation using intrasacral screws as an anchor for the spinal instrumentation. Effective resistance of flexural bending moment and fusion were achieved in these patients at the lumbosacral level.ConclusionsAn intrasacral screw can be stabilized by subchondral bone with iliac buttress coverage at the dorsal and ventral sacral cortex. Posterior spinal fusion with this screw technique enables easier assembly of the instrumentation and presents better stabilization than that provided by the previously reported intrasacral rod technique for correction and fusion of thoracolumbar kyphoscoliosis.

show abstract

Untitled

Cited by 7 publications

References 0 publications

Anatomic Parameters for Instrumentation of the Sacrum and Pelvis: A Systematic Review of the Literature

Anatomic Parameters for Instrumentation of the Sacrum and Pelvis: A Systematic Review of the Literature

Radiographic study of iliac screw passages

Lumbosacral fixation using sacroiliac buttress screws: a modification to the Jackson technique with intrasacral rods

Contact Info

Product

Resources

About