DOS Kongressen 2014 ·
153
Arthrodesis of the knee after failed knee
arthroplasty
Tinne Brandt Gottfriedsen, Anders Odgaard,
Henrik M Schrøder Henrik Morville Schrøder
Department of Orthopaedics, Copenhagen University Hospital Gentofte
Background:
Existing data on arthrodesis for failed knee arthroplasty is limited.
Data from the Danish Knee Arthroplasty Register (DKR) suggests that only 74
arthrodeses have been performed since 1997.
Purpose / Aim of Study:
To identify the incidence and causes of arthrodesis
after failed knee arthroplasty.
Materials and Methods:
Nationwide data was extracted from the Danish
Hospital Episodes Statistics and DKR. Relevant patient notes were retrospec-
tively reviewed.
Findings / Results:
We identified 89,545 primary knee arthroplasties per-
formed in Denmark from 1997-2013. 153 arthroplasties were followed by ar-
throdesis corresponding to an overall crude incidence of 0.17%. Of these, 152
were performed for causes related to the knee arthroplasty corresponding to an
incidence of 0.17% (range among regions, 0.07-0.28%, p=0.0002). Survival
data will be presented. Mean age was 69.6 years (58.5-73.1, p=0.01). Mean
time between primary knee arthroplasty and arthrodesis was 2.2 years (1.9-
3.0, p=0.81). The patients underwent an average of 2.3 knee surgeries prior to
arthrodesis (1.9-3.2, p=0.04). 57% of cases were assessed at a highly special-
ised hospital (22-100%, p<0.0001). Indications for arthrodesis included infec-
tion in 140 cases (92%), extensor mechanism disruption in 44 cases (29%),
soft tissue deficiency in 22 cases (14%), bone loss in 11 cases (7%), pain in 9
cases (6%), periprosthetic fracture in 5 cases (3%) and chronic knee dislocation
in one case (0.7%). In 74 cases (49%) there were at least two or more indica-
tions for arthrodesis.
Conclusions:
We found significantly more arthrodeses than reported to DKR.
There was large variation in the incidence among Danish regions. The main causes
of arthrodesis were infection and extensor mechanism disruption. Surgeons
should consider new treatment options for these complications.
100.
