Dissociation of the glenoid component in the Macnab/English total shoulder arthroplasty.
Three episodes of mechanical glenoid component failure in two patients are presented. The glenoid component that failed is a two-piece polyethylene metal-backed design, with a snap-fip interlock of the polyethylene insert. The mode of failure with this design should caution both orthopaedic surgeons and implant manufacturers that mechanical dissociation of a snap-fit glenoid liner can occur, and that discretion is advised in their design, fabrication, and use.
Driessnack
R P
RP
Orthopedic Surgery Group, S.C., Peoria, IL 61603.
Ferlic
D C
DC
Wiedel
J D
JD
D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D019736:Prostheses and Implants; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012782:Shoulder / Q000000981:diagnostic imaging; D012785:Shoulder Joint / Q000601:surgery*