[An investigation on failure mechanisms of primary 327 hip arthroplasties].
OBJECTIVE
To summarize the detailed failure mechanisms of revision hip arthroplasties and related risk factors.


METHODS
From November 1988 to July 2008 revision of total hip arthroplasties was performed in 327 patients. The medical history, clinical and imaging material and operation records were investigated.


RESULTS
Regarding revision as the end point of the study, the reasons for 327 revision arthroplasties were aseptic loosening in 226 hips (69.1%), infection in 52 hips (15.9%), periprosthetic fracture in 22 hips (6.7%), instability in 17 hips (5.2%), stem fracture in 5 hips (1.5%) and liner dissociation in 5 hips (1.5%).


CONCLUSIONS
The main failure mechanisms of primary hip arthroplasties are aseptic loosening and infection of implants, which could be attributed to improper selection of operation indications and implants and limitations to surgical philosophy and technique.
Guo
Sheng-Jun
SJ
Department of Adult Joint Reconstructive Surgery, Jishuitan Hospital, Beijing 100035, China.
Zhou
Yi-Xin
YX
Zhang
Liang
L
Wu
Jian
J
Lü
Ming
M
Tang
Jing
J
Zhang
Li-Ang
LA
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D057068:Periprosthetic Fractures; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D012307:Risk Factors; D013530:Surgical Wound Infection; D017211:Treatment Failure