Instruments for use in femoroacetabular impingement procedures
Improved instruments (tools) and surgical techniques are provided for use in surgical procedures that treat femoroacetabular impingement of both the Cam and Pincer types.
1. An anchor drill guide for use in a surgical treatment of acetabular impingement comprising:
an elongated main body that has a distal end and has a bore formed therein that is open at the distal end, the main body having an inner edge and an outer edge;
a pointed tip portion that is at the distal end of the main body and is formed along the outer edge for stable alignment of the guide on a bone without impeding rotation of the guide, wherein the pointed tip portion terminates in a sharp tip that is configured to penetrate bone and the anchor drill guide is configured to pivot about the sharp tip;
a rounded tip portion that is formed along the inner edge of the main body at the distal end thereof for retracting the labrum into an inner recess, wherein the pointed tip portion is more distal than the rounded tip portion; and
a contoured tip portion that is joined to inner edge of the main body such that the contoured tip extends outwardly from the inner edge of the main body and distally beyond the sharp tip portion and the inner recess is defined between the main body and the contoured tip portion, the contoured tip portion for resting on cartilage.
2. The anchor drill guide of claim 1 , wherein the main body comprises a tubular structure that is open both at the distal end and an opposite proximal end.
3. The anchor drill guide of claim 1 , wherein the contoured tip portion is connected to the inner edge of the main body by a curved arm that has a portion that extends in a direction that is parallel to a longitudinal axis of the main body.
4. The anchor drill guide of claim 1 , wherein the contoured tip portion has a truncated spherical shape, with a flat surface thereof facing away from the pointed tip portion and a spherical surface facing the pointed tip portion.
5. The anchor drill guide of claim 1 , wherein the bore is formed between the rounded tip portion and the pointed tip portion.
6. The anchor drill guide of claim 1 , wherein the contoured tip portion has a spherical shape.
7. The anchor drill guide of claim 1 , wherein the bore is sized to receive each of a drill bit and a bone anchor.
8. The anchor drill guide of claim 1 , wherein a maximum height of the guide as measured from the bottom edge of the main body to a top edge of the contoured tip portion is approximately 8.5 mm.
9. The anchor drill guide of claim 1 , wherein an offset distance from the pointed tip portion to a spherical head of the contoured tip portion is about 5.25 mm.
10. The anchor drill guide of claim 1 , wherein the pointed tip portion comprises a spike defined by inwardly tapering walls that terminate in the sharp tip.
11. The anchor drill guide of claim 1 , wherein the rounded tip portion is disposed between the pointed tip portion and the contoured tip portion.
12. The anchor drill guide of claim 1 , wherein the guide includes an axis that passes through a tip of the pointed tip portion and through the rounded tip portion and is perpendicular to a longitudinal axis of the main body.
13. An anchor drill guide for use in a surgical treatment of acetabular impingement comprising:
an elongated main body that has a distal end and has a bore formed therein that is open at the distal end, the main body having an inner edge and an outer edge;
a pointed tip portion that is at the distal end of the main body and is formed along the outer edge for stable alignment of the guide on a bone without impeding rotation of the guide;
a rounded tip portion that is formed along the inner edge of the main body at the distal end thereof for retracting the labrum into an inner recess, wherein the pointed tip portion is more distal than the rounded tip portion; and
a contoured tip portion that is joined to inner edge of the main body by an arm portion that extends outwardly from the inner edge of the main body and extends distally such that the contoured tip portion is located distally beyond the sharp tip portion and the inner recess is defined between the main body and the arm portion , the contoured tip portion being configured to rest on cartilage, wherein the arm portion extends along an axis that is parallel to a longitudinal axis of the elongated main body and the contoured tip portion has a spherical shape with a bottom surface which extends below the arm portion.
14. The anchor drill guide of claim 13 , wherein arm portion is formed proximal to the rounded tip portion such that the inner edge of the main body extends distally beyond the arm portion.
15. The anchor drill guide of claim 13 , wherein the pointed tip portion comprises a sharp spike that is configured to penetrate bone and the anchor drill guide is configured to pivot about the sharp spike.