Compression pin with opposed threaded regions

A compression pin for urging two bone regions together, the compression pin comprising:

• a pin body having a distal end, an opposed proximal end, a first threaded region positioned near the distal end, and a second threaded region positioned near the first threaded region,
• the first threaded region including a first thread extending from a first diameter, the first thread having a first trailing surface that is at a first trailing angle and a first radius of curvature formed between the first trailing surface and the first diameter, and
• the second threaded region including a second thread extending from a second diameter, the second thread having a second trailing surface that is at a second trailing angle that is at least two degrees different than the first trailing angle, the second thread having a second radius of curvature formed between the second trailing surface and the second diameter, wherein the second radius of curvature is at least two percent greater than the first radius of curvature.

A compression pin for urging two bone regions together, the compression pin comprising:

• a pin body having a distal end, an opposed proximal end, a first threaded region positioned near the distal end, and a second threaded region positioned near the first threaded region, the first threaded region including a first thread extending from a first diameter and having a first leading surface and a first thread cross-sectional shape, and the second threaded region including a second thread extending from a second diameter and having a second leading surface and a second thread cross-sectional shape that is approximately opposite to the first thread cross-sectional shape,
• wherein a first radius formed between the first diameter and the first leading surface is at least twenty percent greater than a second radius formed between the second diameter and the second leading surface.