A biomechanical comparison of repair techniques in posterior type II superior labral anterior and posterior (SLAP) lesions.
The purpose of this study was to compare the 3 different fixation methods of posterior type superior labral anterior posterior (SLAP) II lesion. Fifteen cadavers were randomly divided into 3 groups to compare the initial strength of 3 different fixation methods in posterior type II SLAP lesions. Group I used 1 anchor for 1-point fixation with a conventional simple suture; group II used 1 anchor passing both limbs through the posterior-superior labrum in a mattress fashion; and group III used 2 anchors for 2-point fixation with conventional simple sutures. Repair failure (2 mm permanent displacement of repaired site) and ultimate failure were measured. The mean load to (clinical) failure was 156 +/- 22 N in group I, 117 +/- 33 N in group II, and 161 +/- 44 N in group III. The mean load to ultimate failure was 198 +/- 6 N in group I, 189 +/- 23 N in group II, and 179 +/- 22 N in group III. The specimen stiffness was equivalent among groups. In mode of failure, clinical failure (more than 2 mm separations) first occurred between the markers on the biceps tendon just above (A) and below (B) compared to other markers, and ultimate failure occurred at the labral-implant interface. A single simple suture anchor repair in posterior type II SLAP seems sufficient to withstand the initial load without clinical failure. A mattress suture, although it anchors the biceps root, seems to be inferior than simple suture technique.
Yoo
Jae Chul
JC
Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
Ahn
Jin Hwan
JH
Lee
Sang Hak
SH
Lim
Hong Chul
HC
Choi
Kui Won
KW
Bae
Tae Soo
TS
Lee
Chang Yang
CY
D001182:Arthroscopy; D001696:Biomechanical Phenomena; D002102:Cadaver; D006801:Humans; D008023:Ligaments, Articular / Q000293:injuries* / Q000601:surgery; D019637:Orthopedic Procedures / Q000379:methods*; D011897:Random Allocation; D000070599:Shoulder Injuries; D053441:Suture Anchors; D013536:Suture Techniques