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· DOS Abstracts
Can low knee awareness and higher function af-
ter primary TKA be predicted? A cross-sectional
study of 316 patients 1 to 4 years after surgery.
Morten Grove Thomsen, Roshan Latifi, Thomas Kallemose, Henrik Husted,
Anders Troelsen
Dept. of Orthopedic surgery, Copenhagen University Hospital of Hvidovre,
Denmark
Background:
Low knee awareness and high knee function during activities of
daily living has become the main goal after primary TKA. Evidence based infor-
mation regarding the influence of patient derived factors on knee awareness
and functional outcome after TKA, however, is sparse.
Purpose / Aim of Study:
To investigate the influence of age, gender, KL-grade,
prosthetic design, year of surgery and pre- and postoperative knee alignment
on postoperative Forgotten Joint Score (FJS) and Oxford knee score (OKS).
Materials and Methods:
Through database search we randomly selected 360
patients receiving a previous generation standard CR TKA, a newer generation
CR TKA or mobile bearing TKA at our institution between 2010 and 2012 (1 to
4 years follow-up). Age at surgery, gender, KL-grade, prosthetic design, year of
surgery and pre- and postoperative knee alignment was documented. Patients
were asked to complete the FJS and OKS questionnaires. 316 patients com-
pleted the survey and were eligible for analysis. A predictive linear regression
model evaluating the impact of patient derived factors on FJS and OKS scores
was created.
Findings / Results:
We found that female gender (p=0.002), low preoperative
KL-grade (p=0.03) or a previous generation CR TKA prosthetic design (p=0.04)
led to statistically significant lower postoperative FJS scores. Regarding the OKS
scores, we found that female gender (p=0.001), preoperative valgus mal- align-
ment (p=0.04) or a previous generation CR TKA prosthetic design (p=0.005)
led to statistically significant lower postoperative scores.
Conclusions:
A good result after TKA is influenced by gender, kl-grade, pre-
operative knee alignment and prosthetic design. Knee awareness and function
during activities of daily living, however, was not influenced by postoperative
knee alignment, time since surgery or age at surgery at 1 to 4 years follow-up.
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