Vastus Medialis Obliquus Muscle Morphology in Primary and Recurrent Lateral Patellar Instability

Table 2

Distribution of predisposing factors of lateral patellar instability.

	Primary LPD; 𝑛=30	Recurrent LPD; 𝑛=30	Controls; 𝑛=22	𝑃 value
Trochlear dysplasia
None	1	0	16	<0.001
Mild	9	4	5
Severe	20	26	0
TT-TG distance (mm)	13.6±3.3	16.1±4.1	9.0±3.7	<0.01
Patellar height	1.27±0.17	1.29±0.17	1.15±0.11	0.0053

Comparison of trochlear dysplasia, TT-TG distance, and patellar height in primary and recurrent patellar dislocations and controls. Data are presented as frequencies and as mean ± standard deviation. LPD: lateral patellar dislocation; TT-TG: tibial tuberosity-trochlear groove.