Apparatus and method for elongating a tendon

1. A method of elongating a tendon, comprising:

obtaining a cutting blade;

positioning a helical body about a portion of the tendon; and

moving the cutting blade along the helical body to guide the cutting blade along the tendon on a helical path so as to make a helical cut in the tendon,

wherein the helical body has a first end, a second end, an interior side, an exterior side, and a blade receiving slot extending through the helical body from the exterior side to the interior side, wherein the blade receiving slot has a closed first end and a closed second end, and wherein the guiding step further comprises inserting the cutting blade in the blade receiving slot and moving the blade along the blade receiving slot of the helical body.

2. A method of elongating a tendon, comprising:

obtaining a cutting blade;

bending the tendon on a section adjacent to a fixed end of the tendon in such a way that a longitudinal section of the tendon is shifted with respect to the fixed end of the tendon;

inserting a K-wire into the shifted longitudinal section of the tendon in a direction coaxial with the central axis of the shifted longitudinal section of the tendon;

obtaining a shaft with the cutting blade extending laterally from the shaft with a cutting edge of the cutting blade extending from a front end of the shaft and the cutting blade positioned at an angle α with respect to the longitudinal axis of the shaft;

sliding the shaft over the K-wire until the cutting blade contacts the longitudinal section of the tendon; and

moving the cutting blade along the tendon in a helical path so as to make a helical cut in the tendon by rotating the shaft and the cutting blade about the longitudinal axis and simultaneously axially advancing the shaft and the cutting blade through the shifted longitudinal section of the tendon so as to move the cutting edge of the cutting blade through at least a portion of the tendon in a helical path thereby making a helical cut in the tendon.