Causes and rates of revision total knee arthroplasty: Local results from Isfahan, Iran.
BACKGROUND
Knee replacement is one of the most frequently performed surgical procedures in the world. Local data on revision total knee arthroplasty (TKA) are limited. This study aims to assess the rates and causes of revision TKA in Kashani Hospital (Isfahan, Iran) from 2011 to 2013.


METHODS
We assessed all primary TKA and revision TKA procedures performed from 2011 to 2013 for the rate and causes of failures. Demographic data, duration from primary TKA to revision TKA and underlying diagnosis for primary TKA were also assessed.


RESULTS
Overall, 353 primary TKA procedures carried out in this period. The overall revisions following primary TKA in this period was 24 cases, indicating a revision burden of 6.8%. The most common cause of revision TKA was infection, which was in 16 cases (44.4%). Other causes included patellar complications, mechanical loosening of both tibia and femur, mechanical loosening of tibia, instability, and periprosthetic fracture. The main revision procedures were all component revision, tibial component revision, isolated tibial insert exchange and patellar tendon repair. The most common revision procedure was two stage all component revision, which was carried out in 13 subjects (36.1%).


CONCLUSIONS
Local indications for revision TKA are mainly similar to those in other large centers. As compared with other centers, with considering the follow-up time, revision burden is relatively higher in this center.
Department of Orthopedy, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Mehdi
M
Motififard
Department of Orthopedy, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Mohamad
M
Pesteh
Department of Orthopedy, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Mohammad Reza
MR
Etemadifar
Department of Radiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Somayeh
S
Shirazinejad
Revision causes; revision rate; total knee arthroplasty