The influence of primary treatment approach on outcomes in patients with osteochondral fracture after patellar dislocation: a case series

Table 2 Clinical characteristics in the treatment groups

	Surgery, n = 73	Conservative, n = 61	p-value*
OCF occurred in primary dislocation, n (%)	63 (86)	42 (69)	0.026
OCF location, n (%)			0.351
Patellar medial facet	30 (41)	32 (52)
Patellar ridge	15 (21)	7 (11)
Femur lateral condyle	25 (34)	21 (34)
Femur and patella	3 (4)	1 (2)
OCF size in cm², mean (SD)	2.6 (1.7)	1.4 (0.9)	< 0.001
Anatomical measures, mean (SD)
ISI	1.18 (0.18)	1.22 (0.21)	0.322
CDI	1.17 (0.14)	1.20 (0.17)	0.335
PTI	0.56 (0.11)	0.51 (0.14)	0.020
TT-TG	14.8 (4.4)	13.7 (4.3)	0.163
TT-PCL	21.8 (3.7)	21.4 (3.4)	0.593
Sulcus angle	154.9 (7.1)	154.4 (7.6)	0.718
Trochlear depth	2.5 (1.0)	2.6 (1.1)	0.425
Trochlear facet asymmetry	0.51 (0.17)	0.56 (0.13)	0.127
Trochlear condyle asymmetry	1.044 (0.026)	1.035 (0.029)	0.058
Lateral trochlear inclination angle	13.3 (4.1)	14.1 (4.8)	0.318
Recurrent patellar dislocations after occurrence of OCF, n (%)	10 (14)	11 (18)	0.654

OCF osteochondral fracture, SD standard deviation, ISI Insall–Salvati index, CDI Caton–Deschamps index, PTI patellotrochlear index, TT-TG tibial tubercle–trochlear groove distance, TT-PCL tibial tubercle–posterior cruciate ligament distance
*Calculated using an independent sample t-test in continuous variables or Chi-square test in categorical variables

ISSN: 2234-2451