Abnormal patellar loading may lead to femoral trochlear dysplasia: an experimental study of patellar hypermobility and patellar dislocation in growing rats

Table 1 Comparisons of the sulcus angle, sulcus depth, and cartilage thickness between groups

	PHG	SG	t value	p^a	PDG	SG	t value	p^a
3 Weeks post-op
BSA°	137.5 ± 12.0	129.4 ± 4.1	−2.213*	0.045	137.7 ± 11.7	129.4 ± 4.1	−2.320*	0.036
CSA°	136 ± 9.0	128.7 ± 2.9	−2.693*	0.018	136.4 ± 8.1	128.7 ± 2.9	−3.116*	0.008
TSDμm	163.1 ± 18.3	176.1 ± 7.0	2.293*	0.038	162.2 ± 19.6	176.1 ± 7.0	2.315*	0.037
CTLμm	124.2 ± 13	142.1 ± 17.1	2.884	0.009	135.4 ± 30.7	142.1 ± 17.1	0.658*	0.519
CTCμm	131.3 ± 18.5	151.9 ± 10.2	3.389*	0.003	136.3 ± 19.9	151.9 ± 10.2	2.418*	0.028
CTMμm	123 ± 13.2	143 ± 9.2	4.316*	< 0.001	120.1 ± 34.9	143 ± 9.2	2.197*	0.048
6 Weeks post-op
BSA°	132.4 ± 9.8	118.9 ± 7.5	−3.789	0.001	130.1 ± 9.8	118.9 ± 7.5	−3.118	0.005
CSA°	140.1 ± 5.8	118.5 ± 12.1	−5.562*	< 0.001	137.5 ± 12.3	118.5 ± 12.1	−3.813	0.001
TSDμm	235.1 ± 74	289.4 ± 36.8	2.273*	0.037	244.7 ± 60	289.4 ± 36.8	2.197*	0.041
CTLμm	90.2 ± 10.4	87.6 ± 10.4	−0.623	0.539	77.7 ± 12.2	87.6 ± 10.4	2.134	0.044
CTCμm	107.9 ± 15.3	91.9 ± 21	−2.133	0.044	100.6 ± 11.8	91.9 ± 21	−1.252*	0.027
CTMμm	92.6 ± 16.1	87.6 ± 14.2	−0.800	0.432	87.2 ± 13.9	87.6 ± 14.2	0.073	0.943

Asterisks indicate that the t test for equal variances was not assumed
Significant differences are marked in bold
BSA bony sulcus angle; CSA cartilaginous sulcus angle; TSD trochlear sulcus depth; CTL cartilage thickness at the lateral facet; CTC cartilage thickness at the center; and CTM cartilage thickness at the medial facet
^aTwo-sample Student’s t test

ISSN: 1749-799X