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            [0] => Risk factors for poor outcome following L3 liv selection in adolescent idiopathic scoliosis (ais)
        )

    [etablissement] => Array
        (
            [0] => hopital d'enfants de tunis
        )

    [nom] => Array
        (
            [0] => mohsni
        )

    [prenom] => Array
        (
            [0] => ahmed amine
        )

    [email] => Array
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            [0] => ahmedaminemohsni@hotmail.com
        )

    [telephone] => Array
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            [0] => 58918474
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            [0] => 
 
Nom prénom / Name Surname: aouinti mohamed  nizar
Email: aouintinizar4@gmail.com
Hôpital / Hospital: hopital d'enfants  de tunis

 
Nom prénom / Name Surname: MOHSENI ahmed
Email: ahmedaminemohsni@hotmail.com
Hôpital / Hospital: hopital d'enfants tunis

 
Nom prénom / Name Surname: abdennaser ben salem
Email: 
Hôpital / Hospital: 

 
Nom prénom / Name Surname: msakni ahmed
Email: 
Hôpital / Hospital: 

 
Nom prénom / Name Surname: mohamed nebil nessib
Email: 
Hôpital / Hospital: 

 
Nom prénom / Name Surname: zairi mohamed
Email: 
Hôpital / Hospital: 

        )

    [mots_cles] => Array
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            [0] => L3 liv selection;
adolescent idiopathic scoliosis (ais);

        )

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            [0] => 3663
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    [user_email] => Array
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            [0] => ahmedaminemohsni@hotmail.com
        )

    [specialite] => Array
        (
            [0] => Chirurgie orthopédique et traumatologique
        )

    [pays] => Array
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            [0] => Tunisie
        )

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        (
            [0] => In surgical planning for AIS, L3 is chosen over L4 whenever possible to maximize motion segments below the LIV and to avoid disc degeneration. Here we present the 5-year outcomes following fusion to L3 and report several pre-operative factors which make patients high-risk for coronal imbalance or revision surgery. 
Hypothesis There are specific pre-operative factors that increase a patient’s risk for poor outcome following fusion to L3.
Design Retrospective Case-Control 
Introduction Fusion to an L3 LIV is common, though the rate of failure and its risk factors have not been described. Our aim was to identify a cohort of patients with poor outcomes and determine factors that make an L3 LIV high-risk. 
Methods In this analysis of prospectively-collected multicenter data of AIS patients who underwent Posterior spinal fusion to an L3 LIV, we identified patients with a “poor outcome”:  required reoperation  at 5 years follow-up. Radiographs were reviewed to identify those patients whose poor result could be specifically attributed to an L3 LIV:  adding on phenomenon, L4 rotation and coronal malalignment. Patients without a poor outcome at 5 years served as controls. Pre-operative patient and radiographic factors were compared between cases and controls to identify risk factors for poor outcome. 
Results Of 187 patients (81% females; 14.7+/-2.1 years at surgery who underwent PSF to L3 with 5 years of follow-up, 11 (5,8%) were judged to have a poor outcome (7 OOB, 4 revisions) attributable to selecting L3 as the LIV. There were statistically significant differences on univariate analysis between cases and controls with respect to several pre-operative factors, including BMI (26.3 in cases vs. 21,1 in controls; p=0.01), lumbar curve 56 vs. 42 deg. 
Discussion: 5,8% of patients with an L3 LIV had a poor result attributable to LIV selection. There are several pre-operative predictors of poor outcome following fusion to L3 such as high lumbar curve.
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