Sacrum osteotomy to change pelvic parameters: Surgical technique and 3D modeling - 23/09/20
, Pascal Khalifé b, Hugues Pascal-Moussellard c
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Abstract |
Purpose |
Some clinical situations, such as great sagittal imbalance, high-grade isthmic spondylolisthesis or sacral malunion could require a sacral osteotomy to decrease pelvic parameters, horizontalize the sacrum or correct sacral malunion. Here is described a novel technique to perform a sacral osteotomy to decrease pelvic parameters with a lumbo-pelvic construct, with first a sacral slope decrease, then a pelvic tilt decrease.
Methods |
Simulations have been performed using tridimensional reconstructions of the lumbar spine and pelvis, made from CT-scan images of a healthy individual. A cadaveric study has then been performed.
Results |
3D modeling exhibited linear relationship between osteotomy angle and pelvic incidence correction, through multiple simulations with 1° increment. Cadaveric study demonstrated feasibility.
Conclusion |
This preliminary work shows that this technique is efficient to decrease pelvic parameters. A linear relationship has been exhibited between osteotomy angle and PI decrease, as per the following formula: osteotomy angle=PI change/0.84.
Le texte complet de cet article est disponible en PDF.Keywords : Sacrum osteotomy, Pelvic parameters, Pelvic incidence, Sagittal alignment
Plan
Vol 106 - N° 6
P. 1227-1232 - octobre 2020 Retour au numéro
Article précédent
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