Bio-mechanical prosthetic finger with H-shaped rocker

A method of installing a prosthetic device onto a user's residual finger, comprising:

• providing a customizable prosthetic finger having a proximal ring configured to concentrically receive the user's residual finger, the proximal ring forming at least one shim-retainment aperture;
• inserting the residual finger into an interior of the proximal ring of the customizable prosthetic finger;
• assessing a fit of the proximal ring about the residual finger;
• removing the customizable prosthetic finger from the residual finger;
• providing a plurality of shims, each of the plurality of the shims including at least one retaining grommet and configured to be received within the interior of the proximal ring, wherein each of the plurality of the shims has a different thickness;
• selecting a first shim having a first thickness from the plurality of the shims;
• inserting the first shim into the interior of the proximal ring such that the first shim reduces an inner diameter of the interior of the proximal ring by an amount proportional to the first thickness, wherein the inserting the first shim into the interior of the proximal ring comprises inserting the at least one retaining grommet into the at least one shim-retainment aperture such that the at least one retaining grommet protrudes through the at least one shim-retainment aperture, thereby retaining the first shim within the interior of the proximal ring;
• and
• reinserting the residual finger into the interior of the proximal ring.

A method of adjusting a customizable prosthetic finger to fit a user's residual finger, the customizable prosthetic finger including a proximal ring having an interior configured to concentrically receive the residual finger and forming at least one shim-retainment aperture, the method comprising:

• (1) selecting a fit shim from a plurality of fit shims, each of the plurality of the fit shims including at least one retaining grommet;
• (2) inserting the selected fit shim into the interior of the proximal ring such that the fit shim reduces an inner diameter of the interior of the proximal ring by an amount proportional to the selected fit shim, wherein the inserting the selected fit shim into the interior of the proximal ring comprises inserting the at least one retaining grommet into the at least one shim-retainment aperture such that the at least one retaining grommet protrudes through the at least one shim-retainment aperture, thereby retaining the selected fit shim within the interior of the proximal ring;
• (3) inserting the residual finger into the proximal ring of the customizable prosthetic finger;
• and
• (4) assessing a tightness of the selected fit shim about the residual finger.