The mechanical effects of suture anchor insertion angle for rotator cuff repair.
Twelve matched pairs of humerii were instrumented with suture anchor at 90 degrees, 75 degrees, 45 degrees, and 30 degrees relative to the cortical border at the junction of the greater tuberosity and articular surface. Two fixtures were inserted into each specimen at different angles and loaded to failure. Suture anchors failed at an average of 171, 219, 169, and 192 N with 90 degrees, 75 degrees, 45 degrees, and 30 degrees insertion angles, respectively. No statistical difference was detected between groups (P=.08). Although previous authors have prescribed angles < or =45 degrees to improve pull-out strength, the current in vitro data does not support these recommendations.
Liporace
Frank A
FA
Hospital for Joint Diseases, New York University, New York, USA.
Bono
Christopher M
CM
Caruso
Steven A
SA
Weiner
Bradley
B
Penny
Keith
K
Feldman
Andrew J
AJ
Grossman
Mark G
MG
Haher
Thomas R
TR
D000328:Adult; D000368:Aged; D001696:Biomechanical Phenomena; D002102:Cadaver; D006801:Humans; D008875:Middle Aged; D017006:Rotator Cuff / Q000601:surgery*; D000070636:Rotator Cuff Injuries; D013314:Stress, Mechanical; D013536:Suture Techniques