Single-row versus double-row capsulolabral repair : a comparative evaluation of contact pressure and surface area in the capsulolabral complex-glenoid bone interface

Abstract

[한글]

[영문]Background: Despite attentions had been paid to restoration of the capsulolabral complex anatomical insertion onto the glenoid, studies that compared the pressurized contact area and mean interface pressure at the anatomical insertion site between a single-row repair and a double-row labral repair have been uncommon.Purpose: The purpose of our study was to compare the mean interface pressure and pressurized contact area at the anatomical insertion site of the capsulolabral complex between a single-row repair and a double-row repair technique.Methods: Thirty fresh frozen cadaver shoulders (mean age. 61±8 years; range, 48-71 years) were used for this study. Two types of repair were performed on each specimen : (1) a single-row repair and (2) a double-row repair. Using pressure sensitive films (Prescale Ultra Super Low Pressure Fuji Photo Film, C. Itoh & Co, New York, NY), the interface contact area and contact pressure were examined.Results: The mean interface pressure was greater for the double- row repair technique (0.29±0.04 MPa) when compared with the single row repair technique (0.21±0.03 MPa) (p=0.003). The mean pressurized contact area was also significantly greater for the double- row repair technique (211.8±18.6 mm², 78.4% footprint) compared with the single row repair technique (106.4±16.8 mm² , 39.4% footprint) (p=0.001).Conclusion: The results of this study show that the double-row repair has significantly greater mean interface pressure and pressurized contact area at the insertion site of capsulolabral complex than single-row repair. Therefore, it is considered that the double row repair is more advantageous than the single row repair to restore the native footprint area of the capsulolabral complex.