DOS 2017

· DOS Abstracts

Isolated Tibial Insert Exchange after Primary Total Knee

Arthroplasty

Amir Pasha Attarzadeh, Amin Bakhtyar Baram, Thorbjørn Gantzel Christiansen,

Thomas Lind

Orthopedic department, Herlev og Gentofte Hospital

Background:

Patients with Total Knee Arthroplasty (TKA) can be revised with

isolated polyethylene liner exchange. The indication varies from pain, stiffness,

recurrent effusion, wear or instability. The effectiveness of this procedure is

quite controversial. An analysis of results based on these subgroups may give us

knowledge about the best indication.

Purpose / Aim of Study:

The aim of this study is to evaluate the results of

isolated polyethylene exchange in patients with instability and pain.

Materials and Methods:

From out database we identified all patients who un-

derwent revision of a TKA with liner exchange in our institution in the period

from 2010 to 2013. We included all patients with instability and pain as de-

scribed by the surgeon. We excluded all patients who had other interventions.

Patient reported outcome was evaluated with a KOOS and a Oxford Knee Score

questionnaire and clinical assessment was conducted using Knee Society Score.

Findings / Results:

We had a population of 19 patients, 12 women and 7

men. One patient had bilateral liner exchange. Mean increase in liner thickness

was 5,8mm (2,5- 7,5mm). Mean follow-up time after revision was 44 months

(30-60). Mean KOOS for categories Pain, other Symptoms and ADL was 62-64

but for Function in Sport and Recreation and for Quality of Life it was 27 and

43. Mean Knee Society Score and Function score was 66 and 69. Mean Oxford

Knee Score was 29. Postoperatively, mean VAS in rest was 1 and in activity 4.

Average time between the operations was 24 months.

Conclusions:

Our results reveal poor outcome when isolated polyethylene liner

exchange is performed on the indication instability and pain. Careful patient se-

lection for this procedure may yield better results. Further studies are needed

to confirm this.

No conflicts of interest reported

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