1. Yielding of the tendon in tendon suture and transplantation through necrosis produced by over-tight sutures must occur, if at all very rarely, when the sutures are tied under ordinary tension.
2. Failure of the suture through insufficient hold is, however, probably fairly common.
3. The process of repair is slower in tendon transplantation than in tendon suture and tenotomy, the probable cause being:— (1) Interference with the circulation of the reinforcing tendon due to its separation from the surrounding tissue for so large a portion of its length, and (2) defects in the synovial sheath. Care should be taken, therefore, not to separate the tendon from the surrounding tissue for any greater distance than is absolutely necessary and to preserve and suture the sheath as far as possible.