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In the 1950s, Mckeever presented the concept
of unicompartmental knee resurfacing, the goal
of this procedure is to replace only the damaged
tibiofemoral compartment. However, it was
only in the 70s that the development of the
unicompartmental knee arthroplasty (UKA)
actually started.
The literature has demonstrated very good
results after UKA of the lateral knee
compartment (Table 1). In our experience, 70%
of patients had no knee complaints, with mean
knee flexion of 133° and Kaplan-Meier survival
curve of 97% rate at 10-years follow-up.
However, it is extremely important to identify
and respect the criteria and principles related to
the surgical indication, knee balance as well as
the correct positioning of the implants.
Patient-related
factors (major rules)
Stage of knee osteoarthritis
In cases of the irreducible and severe lateral
knee osteoarthritis (which are commonly
associated to peripheral ligament anomalies),
the lateral unicompartmental knee replacement
is contra-indicated.
In our experience, the stage of knee osteo
arthritis has influenced the surgical outcomes.
the knee score and the function score were
more bad if the stage of knee osteoarthritis was
more high.
Lateral unicompartment
knee arthroplasty (UKA):
technical choice, choice
of implant and results
R. Badet, S. Piedade
n
Survival
Clinical results
Berg 2005
66 (Miller Galante) 98% at 10 years 80% excellent results
Tabor 2005
100 (Marmor)
90% at 10 years knee score 91 functional score 77
Price 2005
114 (Oxford)
94% at 10 years 91% excellent or good results
Pennington 2006 29 (Miller Galante)
100% excellent or good results
Amin 2006
54 (Oxford)
88% at 5 years knee score 82 functional score 85
Kobayshi 2001 30 (Mamor,
Oxford, Omnifit)
96.4% at 10 years knee score 82 functional score 68.4