The materials and uses are different.

1. Material: blue nails are polylactic acid absorbable sutures, green nails are polyglycolide sutures, and white nails are synthetic absorbable sutures.

2. Purpose: Blue nails and green nails are commonly used medical sutures in surgeries, while white nails are used in gynecology, obstetrics, surgery, plastic surgery, urology, pediatric surgery, and oral surgery. Surgery and suturing.