Geometric Morphology of the Coracoacromial Ligament: A Cadaveric Study

Table 1

The mean lengths (mm) of medial and lateral borders and the mean widths of coracoid and acromial insertions according to CAL types.

	Y-shaped	Broad-banded	Quadrangular	V-shaped	Multiple-banded	Total	p
	n=9	n=12	n=9	n=24	n=6	n=60
LBL	34.30 ± 4.35	34.52 ± 5.13	39.12 ± 4.29	34.50 ± 4.12	32.30 ± 3.32	34.94 ± 4.59	0.035
MBL	32.16 ± 4.27	27.35 ± 5.74	36.48 ± 3.90	35.50 ± 3.62	34.13 ± 4.12	33.38 ± 5.31	p<0.001
CIW	26.82 ± 2.56	13.99 ± 3.43	37.01 ± 3.39	34.96 ± 5.22	34.68 ± 3.70	29.82 ± 9.48	p<0.001
AIW	10.82 ± 1.75	10.51 ± 2.80	14.36 ± 0.89	13.45 ± 4.93	13.63 ± 4.71	12.62 ± 3.95	0.069

LBL: lateral border length; MBL: medial border length; CIW: coracoid insertion width; AIW: acromial insertion width.
Data are reported as mean ± SD. ANOVA; α: 0.05; independent t test; difference is statistically significant; post hoc; Tukey HSD test, Tamhane T2 test.
Difference with Y-shaped is statistically significant.
Difference with broad-banded is statistically significant.
Difference with quadrangular is statistically significant.
Difference with V-shaped is statistically significant.
Difference with multiple-banded is statistically significant.