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Preoperative prediction of the graft size used in Superior Capsular Reconstruction using MRI
ESSKA Academy. Yiannakopoulos C. Nov 8, 2019; 286382
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Preoperative prediction of the graft size used in Superior Capsular Reconstruction using MRI

ESA Free Oral Presentations

Topic: Imaging

Yiannakopoulos C.1,2, Vlastos I.1, Theotokatos G.1, Zekis T.1, Alexopoulos T.3, Noutsos K.1
1National and Kapodistrian University of Athens, Greece, Biomechanics Laboratory, School of Physical Education and Sport Science, Athens, Greece, 2Metropolitan General Hospital, 2nd Orthopaedic Department, Athens, Greece, 3Metropolitan General Hospital, Medical Imaging, Athens, Greece

Introduction: Superior capsular reconstruction (SCR) for irreparable rotator cuff tears depends, among other factors, on the correct intraoperative measurement of the defect size. Using undersized or oversized grafts lead to inappropriate graft tension and biomechanical failure of the procedure.
Accurate preoperative defect size prediction may be helpful, especially when a fascia lata autograft is used.
Objectives: The primary objective of this study was to compare defect size estimation using intraoperative measurements and preoperative defect size measurements using MRI.
Methods: In this study, 3 Tesla shoulder MRIs of 20 patients who underwent SCR were used. Using sagittal MRI images, the horizontal anteroposterior and lateral defect size was measured at the glenoid and the greater tuberosity level. Using coronal MRI images, the horizontal mediolateral defect size was also measured at the anterior glenoid level and at the infraspinatus level. The same measurements were repeated intraoperatively using a calibrated arthroscopic ruler. The preoperative and the intraoperative defect size measurements were compared using the Independent samples t-test and additionally, a
Pearson Correlation analysis using the r index was performed. A power analysis revealed a sample size of 9 in order to show statistical significance.
Results: There was no statistically significant difference at the p=0.05 level for any the measured sites. The Pearson's correlation index r between the 4 measurements ranged between 0,76 and 0.83.
Conclusions: This study showed that a significant correlation between the preoperative using MRI and the intraoperative rotator defect size measurements exists.
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