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Clin Shoulder Elbow > Volume 12(2); 2009 > Article
Journal of the Korean Shoulder and Elbow Society 2009;12(2):207-214.
DOI: https://doi.org/10.5397/CiSE.2009.12.2.207    Published online December 31, 2009.
Is the UU Stitch Really Alternative to Modified MA (Mason-Allen) Stitch for Rotator Cuff Repair?: Biomechanical Comparative Study of UU to Modified MA Stitch
Darren J Friedman, Sang Hun Ko, Ki Bong Park, Hyung Min Jun, Tae Won Kim, Hyun Woo Lim, Young Jin Yum
1Department of Orthopedic Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Korea. shkoshko@naver.com
2School of Medical and Automotive Engineering, Ulsan University, Korea.
3NYU Hospital for Joint Diseases, NYU School of Medicine, USA.
회전근 개 파열의 봉합에서 UU 봉합법은 변형된 MA(Mason-Allen) 봉합법을 대치할 수 있는가? - UU 봉합법과 변형된 MA 봉합법의 생역학적 비교-
Darren J Friedman*·고상훈·박기봉·전형민·김태원·임현우**·염영진**
울산대학교 의과대학 울산대학교병원 정형외과, 공과대학 기계자동차 공학**
뉴욕대학 관절병센터
Abstract
PURPOSE
In arthroscopic rotator cuff repairs there are generally weak link in tendon suture interface, arthroscopic rotator cuff repairs can have higher retear rates than open repairs. The purpose of this study was to compare the strength of UU (Ulsan University) suture than open modified MA (Mason-Allen) suture when suture anchored into bone. MATERIALS AND METHODS: The human supraspinatus tendons were harvested from the shoulder of the cadaver and split in 2 times, producing four tendons per one shoulder, for a total of 24 specimens. Two suture configurations (UU, MA) were randomized and checked on each set of tendons. Specimens were cyclically loaded under force control between 5 and 30 N at 0.25 Hz for fifty cycles. Each specimen was loaded to failure under displacement control at 1 mm/sec. Cyclic elongation, peak to peak displacement, stiffness, ultimate tensile load, mode of failure were checked.
RESULTS
No significant difference was found between two suture configuration with respect to peak to peak displacement, cyclic elongation, and stiffness. With regard to ultimate failure load, there were no significant difference statistically between the UU suture and modified MA suture (109.4 N, 110.6 N). The most common mode of failure between both sutures was suture pull-out through the tendon.
CONCLUSION
The UU suture and modified MA suture produced similar biomechanical properties.
Key Words: Shoulder; Rotator cuff repair; Biomechanics; UU suture; Modified Mason-Allen suture
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