298 / 324
were designed to specifically look at the
influence of gender on the UKA surgery out-
come. The differences noted in these series
could be explained by the higher weight of
male patients, severity of the clinical presenta-
tion or age… That’s why we conducted a spe-
cific study with 2 matched groups. Our results
showed no significant difference between cli-
nical and radiological results of the 2 groups at
5.9 years of mean follow up. Sex should not be
included in the many criteria that will guide
the surgeon to perform a UKA rather than a
TKA or a High Tibial Osteotomy. Similarly,
the development of gender-specific implant
does not seem necessary. The implant size dif-
ference noted between the two groups are lin-
ked to differences in height and weight
(Table 7), since in our groups, despite the mat-
ching of BMI, patients were not matched for
height and weight, which is a bias in our study.
Moreover, our implant is a femoral resurfacing
implant that requires no distal or anterior cut-
ting, only a posterior chamfer is made. This
design of the femoral implant may be involved
in the absence of difference between genders
on the outcome of our UKA concept.
CONCLUSION
Our comparative study shows no significant
difference between men and women, in terms
of clinical and radiological outcome following
UKA surgery. Based on these results, we
conclude that while the size of implants dif-
fers, no gender based difference in implant
design is needed.
THE EFFECT OF GENDER ON OUTCOME OF UNICOMPARTIMENTAL KNEE ARTHROPLASTY
297
Author/source
Implant’s number
Woman percentage
Stockelman [26]
63
38 %
Ridgeway SR [27]
150
44 %
Australian’s register
25607
48.9 %
Gulati A [28]
211
55 %
Fawzy E [29]
100
56 %
Rougraff BT[30]
98
61 %
Furnes O [25]
2288
62 %
Koskinen E [21]
1817
67.5 %
Tabor JA [22]
73
70 %
Neyret P [16]
172
83 %
Table 9: Proportion of women in UKA
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