Biomechanical comparison of double-row versus transtendon single-row suture anchor technique for repair of the grade III partial articular-sided rotator cuff tears

被引:1
|
作者
Zhang Chun-gang [1 ]
Zhao De-wei [1 ]
Wang Wei-ming [1 ]
Ren Ming-fa [2 ]
Li Rui-xin [1 ]
Yang Sheng [1 ]
Liu Yu-peng [1 ]
机构
[1] Dalian Univ Technol, Affiliated Zhongshan Hosp, Dept Orthoped, Dalian 116001, Liaoning, Peoples R China
[2] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116001, Liaoning, Peoples R China
关键词
biomechanics; rotator cuff; suture anchor; INFERIOR GLENOHUMERAL LIGAMENT; SUPRASPINATUS TENDON TEARS; PARTIAL-THICKNESS TEARS; ARTHROSCOPIC REPAIR; ANTERIOR BAND; IN-VITRO; ARTHROGRAPHY; FIXATION; STRENGTH; POSITION;
D O I
10.3760/cmaj.issn.0366-6999.2010.21.018
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background For partial-thickness tears of the rotator cuff, double-row fixation and transtendon single-row fixation restore insertion site anatomy, with excellent results. We compared the biomechanical properties of double-row and transtendon single-row suture anchor techniques for repair of grade III partial articular-sided rotator cuff tears. Methods In 10 matched pairs of fresh-frozen sheep shoulders, the infraspinatus tendon from 1 shoulder was repaired with a double-row suture anchor technique. This comprised placement of 2 medial anchors with horizontal mattress sutures at an angle of <= 45 degrees into the medial margin of the infraspinatus footprint, just lateral to the articular surface, and 2 lateral anchors with horizontal mattress sutures. Standardized, 50% partial, articular-sided infraspinatus lesions were created in the contralateral shoulder. The infraspinatus tendon from the contralateral shoulder was repaired using two anchors with transtendon single-row mattress sutures. Each specimen underwent cyclic loading from 10 to 100 N for 50 cycles, followed by tensile testing to failure. Gap formation and strain over the footprint area were measured using a motion capture system; stiffness and failure load were determined from testing data. Results Gap formation for the transtendon single-row repair was significantly smaller (P <0.05) when compared with the double-row repair for the first cycle ((1.74+/-0.38) mm vs. (2.86+/-0.46) mm, respectively) and the last cycle ((3.77+/-0.45) mm vs. (5.89+/-0.61) mm, respectively). The strain over the footprint area for the transtendon single-row repair was significantly smaller (P <0.05) when compared with the double-row repair. Also, it had a higher mean ultimate tensile load and stiffness. Conclusions For grade III partial articular-sided rotator cuff tears, transtendon single-row fixation exhibited superior biomechanical properties when compared with double-row fixation. Chin Med J 2010;123(21):3049-3054
引用
收藏
页码:3049 / 3054
页数:6
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