Table 4.

Comparison of conventional CT versus CBCT patellar measurements between raters by type of CT

	conventional CT				CBCT
	Rater 1	Rater 2	Rater 3	p value	Rater 1	Rater 2	Rater 3	p value
Congruence angle (deg)	31.9 ± 13.0	17.2 ± 13.1	20.4 ± 16.8	0.01	34.1 ± 20.0	24.6 ± 13.2	24.2 ± 19.1	0.19
Tilt Angle (deg)	15.6 ± 13.2	16.2 ± 8.0	15.4 ± 9.0	0.96	16.8 ± 10.8	14.1 ± 9.3	12.7 ± 10.3	0.50
TT-TG (mm)	16.5 ± 4.2	15.9 ± 5.7	15.2 ± 4.8	0.73	9.4 ± 5.1	10.6 ± 5.4	9.8 ± 5.5	0.80

Data are presented as mean ± SD. CT, computed tomography; CBCT, cone beam computed tomography; conv. CT, conventional computed tomography; Cong. Angle, congruence angle; TT-TG, tibial tuberosity–trochlear groove