TABLE III.

In Vivo Results of Biomechanical Testing of the Supraspinatus Repair Junction^*

	Young Modulus† (MPa)
	4 Weeks	8 Weeks
Group 1 (primary repair)	7.2 ± 3.8	3.79 ± 2.1
Group 2 (primary repair and augmentation)	4.0 ± 0.5	48.6 ± 9.5

^*The strain rate was 2% per second. The values are given as the mean and the standard deviation. †A significant increase in biomechanical properties was demonstrated between the four-week and eight-week results for Group 2 and between Group 1 and Group 2 at eight weeks (p < 0.05).