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Criteria described by Tang et al. [22]; a histological grading system for tendon healing
| Grade | Description |
|---|---|
| Excellent | Continuity of tendon was re-established and the epitenon was smooth |
| Good | Regular intratendinous collagen bundles, but the epitenon was destroyed by adhesions |
| Fair | Irregular intratendinous collagen bundles, and partly interrupted by adhesions |
| Poor | Disconnection of the repair site by adhesion tissues |
