Table 2.
Microscopic findings according to the duration of Gore Bio-A implantation.
| Inflammatory cell infiltration* | Connective tissue ingrowth | Collagen deposition | Foreign body reaction | Neovascularization | |
|---|---|---|---|---|---|
| 1 month ((a)/(b)) | |||||
| 1-layer | 0/1 | 3/3 | 2/3 | 3/3 | 2/1 |
| 2-layer | 0/0 | 2/2 | 2/3 | 3/3 | 2/2 |
| 3-layer | 0/1 | 3/3 | 3/3 | 3/3 | 3/2 |
| 4-layer | 2/1 | 1/3 | 1/3 | 1/3 | 1/2 |
| 5-layer | 1/1 | 3/3 | 3/3 | 3/3 | 3/2 |
| 3 months ((c)/(d)) | |||||
| 1-layer | 0/0 | 3/2 | 3/1 | 3/1 | 3/1 |
| 2-layer | 0/0 | 2/2 | 1/1 | 3/2 | 2/2 |
| 3-layer | 0/0 | 2/2 | 1/1 | 3/2 | 2/2 |
| 4-layer | 0/1 | 2/2 | 1/1 | 3/2 | 2/2 |
| 5-layer | 0/1 | 2/2 | 3/2 | 3/2 | 1/2 |
| 6 months ((e)/(f)) | |||||
| 1-layer | 1/1 | 3/3 | 1/1 | 2/1 | 1/1 |
| 2-layer | 1/1 | 3/3 | 0/0 | 3/2 | 1/1 |
| 3-layer | 1/1 | 3/3 | 0/0 | 2/1 | 1/1 |
| 4-layer | 1/1 | 3/3 | 0/0 | 3/2 | 1/1 |
| 5-layer | 1/1 | 3/3 | 1/0 | 2/3 | 1/1 |
Scoring: 0: negative; 1: mild; 2: moderate; 3: severe.
*0: no inflammatory cell infiltration; 1: focal inflammatory cell infiltration; 2: acute suppurative inflammation.