AI Article Synopsis
- - The study investigates sacropelvic fixation techniques using new porous fusion/fixation implants (PFFI) along with traditional thoracolumbar instrumentation to improve spinal deformity correction.
- - Three finite element models were tested to compare the effectiveness of PFFI and different fixations on spinal motion during various movements, showing that PFFI improves stability and reduces motion at critical joints.
- - Results suggest that using PFFI can lower the risk of complications such as pseudarthrosis and screw breakage in patients, indicating its potential benefit for clinical outcomes.
Article Abstract
Background: Sacropelvic fixation is frequently combined with thoracolumbar instrumentation for correcting spinal deformities. This study aimed to characterize sacropelvic fixation techniques using novel porous fusion/fixation implants (PFFI).
Methods: Three T10-pelvis finite element models were created: (1) pedicle screws and rods in T10-S1, PFFI bilaterally in S2 alar-iliac (S2AI) trajectory; (2) fixation in T10-S1, PFFI bilaterally in S2AI trajectory, triangular implants bilaterally above the PFFI in a sacro-alar-iliac trajectory (PFFI-IFSAI); and (3) fixation in T10-S1, PFFI bilaterally in S2AI trajectory, PFFI in sacro-alar-iliac trajectory stacked cephalad to those in S2AI position (2-PFFI). Models were loaded with pure moments of 7.5 Nm in flexion-extension, lateral bending, and axial rotation. Outputs were compared against 2 baseline models: (1) pedicle screws and rods in T10-S1 (PED), and (2) pedicle screws and rods in T10-S1, and S2AI screws.
Results: PFFI and S2AI resulted in similar L5-S1 motion; adding another PFFI per side (2-PFFI) further reduced this motion. Sacroiliac joint (SIJ) motion was also similar between PFFI and S2AI; PFFI-IFSAI and 2-PFFI demonstrated a further reduction in SIJ motion. Additionally, PFFI reduced max stresses on S1 pedicle screws and on implants in the S2AI position.
Conclusion: The study shows that supplementing a long construct with PFFI increases the stability of the L5-S1 and SIJ and reduces stresses on the S1 pedicle screws and implants in the S2AI position.
Clinical Relevance: The findings suggest a reduced risk of pseudarthrosis at L5-S1 and screw breakage. Clinical studies may be performed to demonstrate applicability to patient outcomes.
Level Of Evidence: Not applicable (basic science study).
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10478686 | PMC |
| http://dx.doi.org/10.14444/8481 | DOI Listing |
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