Management and outcome of periprosthetic fractures after total knee arthroplasty.
BACKGROUND
The incidence of periprosthetic fractures after total knee arthroplasty is continuously rising because of an increasing number of knee joint replacements and an enhanced survivorship of the elderly population after knee arthroplasty. The purpose of this study was to analyze the practicability and effectiveness of the various treatment methods for management of periprosthetic fractures after total knee arthroplasty, and to determine the clinical and radiographic long-term results of patients following surgical and nonoperative treatment of these injuries.


METHODS
We reviewed the clinical and radiographic records of 41 patients (31 women and 10 men; average age, 78.6 years) with periprosthetic fractures after total knee arthroplasty between 1992 and 2008. Thirty-seven patients showed a periprosthetic fracture of the distal femur, and four patients had a periprosthetic proximal tibial fracture. Thirty-six patients underwent operative stabilization by plate fixation (n = 18), intramedullary nailing (n = 15) or revision arthroplasty (n = 3), and five patients were treated nonoperatively by long-term cast immobilization.


RESULTS
Twenty-eight patients returned to their preinjury activity level and were satisfied with their clinical outcome. In 10 patients, we saw a relevant decrease of knee function and severe limitations in gait and activities of daily living. Three patients died related to surgery. Successful fracture healing within 6 months was achieved in 33 (87%) of 38 patients. Failures of reduction or fixation occurred in 8 (21%) of 38 patients. Reoperation due to technical failures was necessary in three patients.


CONCLUSIONS
Compared with current data in literature, we had a satisfactory outcome in following individualized treatment of periprosthetic fractures after knee joint replacement. Referring to the wide field of treatment options and high rates of complications, periprosthetic femoral fractures around the knee commonly constitute a challenging problem for the treating surgeons and require an adequate analysis of fracture etiology and a corresponding transfer into an individual treatment concept.
Platzer
Patrick
P
Department of Trauma Surgery, Medical University of Vienna, Vienna, Austria. patrick.platzer@gmx.at
Schuster
Rupert
R
Aldrian
Silke
S
Prosquill
Stella
S
Krumboeck
Anna
A
Zehetgruber
Isabella
I
Kovar
Florian
F
Schwameis
Katrin
K
Vécsei
Vilmos
V
D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D001858:Bone Nails; D001860:Bone Plates; D002370:Casts, Surgical; D005260:Female; D005264:Femoral Fractures / Q000000981:diagnostic imaging / Q000628:therapy*; D005592:Fracture Fixation / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000628:therapy*; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012086:Reoperation; D012307:Risk Factors; D013978:Tibial Fractures / Q000000981:diagnostic imaging / Q000628:therapy*; D016896:Treatment Outcome