Fig. (2) Comparison of Suprapatellar Effusion Dimensions across Treatment Groups. The addition of atelocollagen in either SPONGE or CPC-GEL form had no effect on the amount of suprapatellar joint effusion width as measured on the sagittal sections of MRI compared to INTACT knees (p = 0.201). Knees treated with suture repair alone had a significantly lower suprapatellar effusion length than either the INTACT or CPC knees (p<0.001). All values represent mean effusion (mm) +/- standard error.