Active compression apparatus, methods of assembly and methods of use
Compression devices for joining tissue and methods for using and fabricating the same.
1. A method of actively compressing bone segments comprising:
inserting a cannulated screw into a first bone segment and a second bone segment;
applying a longitudinal tensile stress to a cannulated body through deformation of a perforation formed through a sidewall of the cannulated body;
limiting the deformation of the perforation by engaging corresponding deformation limiting features formed in opposing sidewalls of the perforation;
releasing the tensile stress over a period of time; and
compressing the first bone segment and the second bone segment through said releasing the tensile stress.
2. The method of claim 1 wherein inserting the cannulated screw into the first bone segment and the second bone segment and applying the longitudinal tensile stress to the cannulated body through deformation of a perforation formed through the sidewall of the cannulated body are simultaneous.
3. The method of claim 1 wherein applying the longitudinal tensile stress to the cannulated body through deformation of a perforation formed through the sidewall of the cannulated body comprises rotating a plurality of threads having different pitches formed on an exterior of the sidewall of the cannulated body.
4. The method of claim 1 wherein limiting the deformation of the perforation by engaging corresponding deformation limiting features formed in opposing sidewalls of the perforation comprises limiting an increase in a length or an increase in circumference of the cannulated body.