title: Dislocation of total knee arthroplasty. A report of 6 cases with 2 patterns of instability.
abstract: We report 6 cases of dislocation of total knee arthroplasty (TKA). We identified 2 patterns of instability in the sagittal plane, one with posterior translation of the tibia, occurring mainly in the postoperative period and usually resulting from a trauma, and the other with anterior translation of the tibia, occurring 6 months to 7 years postoperatively and with no preceding trauma. In the latter group, instability was manifested gradually as a lengthening of the posterior cruciate ligament and the posterior capsule, leading to a recurvatum deformity of the knee.
authors.affiliation: Department of Orthopedic Surgery, Chung Gung Memorial Hospital at Kaoshiung, Niao Sung Hsiang, Kaoshiung Hsien, Taiwan.
authors.forename: C J
authors.initials: CJ
authors.lastname: Wang
authors.forename: H E
authors.initials: HE
authors.lastname: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D007593:Joint Instability / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery; D007719:Knee Joint; D007720:Knee Prosthesis / Q000009:adverse effects*; D008297:Male; D010003:Osteoarthritis / Q000601:surgery; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation