Table 1. Patency rates of silk fibroin grafts at each time point.

Time point after implantation	1 week	2 weeks	4 weeks	3 months	6 months
Total number of grafts	12	15	37	23	30
Number of patent grafts	6	5	8	3	4
Patency rate (%)	50.0	33.3	21.6	13.0	13.3