Filling Index Score of Remplissage (FISOR): a useful measurement tool to evaluate structural outcome after remplissage

BackgroundThe purpose of this study was to evaluate and to grade the extent of filling into the Hill-Sachs lesion quantitatively by use of magnetic resonance arthrography after an arthroscopic remplissage procedure.MethodsThe current study enrolled 23 patients who underwent arthroscopic Bankart repair with a remplissage procedure for a large or engaging Hill-Sachs lesion confirmed by arthroscopic findings. The postoperative filling index was classified into 5 categories by axial and sagittal views of T2-weighted images on magnetic resonance arthrography: complete filling (4 points); partial filling with minor defect (3 points); partial filling with major defect (2 points); minimal filling with significant free fluid level (1 point); and filling failure with dehiscence (0 point). Filling Index Score of Remplissage (FISOR) was also calculated from the total sum of points in the axial and sagittal planes and classified into 5 grades.ResultsThe FISOR was 8 points in 13 patients, 7 points in 2 patients, 6 points in 3 patients, 5 points in 1 patient, 4 points in 1 patient, 3 points in 1 patient, 2 points in 1 patient, and 0 point in 1 patient. According to the FISOR grades, these results were recorded as excellent in 15 patients (65.2%), good in 4 patients (17.4%), fair in 2 patients (8.7%), poor in 1 patient (4.3%), and no evidence of filling in 1 patient (4.3%).ConclusionThe FISOR would be a useful measurement tool for the evaluation of structural outcomes after the remplissage procedure.