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Sulcus deepening trochleoplasty for the treatment of recurrent patellar dislocation…
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Table 2: Pre and post-operative imaging findings in patients
that underwent trochleoplasty and had previous surgery for patellar dislocation.
Group A: Knees with previous operation for patellofemoral instability
Pre-operative
Post-operative
Sulcus angle
153.0°±14.7°
(130°-177°)
141±10.2° *
NS
(122°-163°)
Caton-Deschamps index
1.03±0.28
(0.5-1.48)
0.95±0.22
NS
(0.69-1.29)
TT-TG distance
16.6±7.7mm
(5-30mm)
12.6±4.2mm **
(5-20mm)
Patellar tilt
31.4o±14.3°
(0°-58°)
11.8°±8.0° **
(1°-31°)
Trochlear dysplasia
Type A
0%
33.3%
Type B
29.1%
0%
Type C
0%
0%
Type D
70.9%
0%
Normal or non-classifiable
0%
66.7%
*: p<.01, **: p<.001, NS: not significant, when compared to pre-operative values.
Table 3: Pre and post-operative imaging findings in patients that underwent
trochleoplasty and had no previous surgery for patellar dislocation.
Group B: Knees with no previous operation for patellofemoral instability
Pre-operative
Post-operative
Sulcus angle
152°±16.2°
(126°-178°)
141°±8.9° *
NS
(126°-155°)
Caton-Deschamps index
1.12±0.18
(0.78-1.4)
0.97±0.15
NS
(0.64-1.25)
TT-TG distance
19±4.8mm
(10-28mm)
12±5.5mm **
(6-24mm)
Patellar tilt
37°±7.8° (0°-58°)
15°±8.7° **
(1°-31°)
Trochlear dysplasia
Type A
0%
45.1%
Type B
38.7%
0%
Type C
0%
0%
Type D
61.3%
0%
Normal or non-classifiable
0%
54.9%
*: p<.01, **: p<.001, NS: not significant, when compared to pre-operative values.