Author/Authors :
Nehme, Alexandre Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , Maalouly, Joseph Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , Jabbour, Fouad Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , Saidy, Elias Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , Lati, Georgio Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , Aouad, Dany Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , Ayoubi, Rami Department of Orthopedic Surgery and Traumatology - Saint George Hospital University Medical Center - Balamand University - Achrafieh - Beirut , Lebanon , El-Hajj, Gerard Department of Radiology - Saint George Hospital University Medical Center - Balamand University- Achrafieh - Beirut, Lebanon
Abstract :
PI is currently used as the gold standard measurement in spinopelvic anatomy. 'ere is a need for a reliable methodto calculate sacral anatomic orientation (SAO) independent of posture and to establish its association with PI, which waspreviously established in a single study (Peleg et al., 2007). 'erefore, the aim of our study is the application and verification of thisassociation on a Lebanese sample.Methods. Methods for measuring SAO and PI on living individuals are described. 'e study wascarried out on 200 adult individuals using CT 3D images (volume-rendering method). Reliability (intratester and intertester) wasevaluated using the intraclass correlation test. A regression analysis was carried out to evaluate the association between the twomeasurements.Results. 'ere were 103 females (51%) and 97 males (49%) with a mean age of 58.68±19.6 years (min�20;max�93). 'e mean SAO and PI in our population were found to be 52.65°(SD�8.16°) and 59.08°(SD�12.53°), respectively.SAO and PI measurements were highly correlated (Pearson correlation test;r� −0.296,P<0.0001 for our general population). PIcan be predicted via SAO, i.e., SAO�(−0.193×PI) + 64.057.Conclusions. SAO may be an important tool, alongside PI, in definingthe sagittal shape of the spine and useful for understanding its association with spinal diseases as they are not affected bypostural changes.
