Implant with bone contacting elements having helical and undulating planar geometries

1. An implant, comprising:

a first body member and a second body member;

a first bone contacting element extending from the first body member to the second body member;

wherein the first bone contacting element has a spiral configuration forming a plurality of arched members including at least a first arched member and a second arched member;

wherein the first arched member includes a first flat bone contacting region having an oblong shape and the second arched member includes a second flat bone contacting region having an oblong shape; and

wherein the first flat bone contacting region and the second flat bone contacting region extend substantially parallel to and offset with respect to one another.

2. The implant according to claim 1 , wherein the oblong shape of the first flat bone contacting region extends along a first axis.

3. The implant according to claim 2 ,

wherein the oblong shape of the second flat bone contacting region extends along a second axis; and

wherein the first axis is parallel to and offset from the second axis.

4. The implant according to claim 1 , further including a second bone contacting element extending from the first body member to the second body member, the second bone contacting element having a spiral configuration forming a plurality of arched members including at least two arched members extending substantially parallel to and offset with respect to one another.

5. The implant according to claim 4 , wherein the at least two arched members of the second bone contacting element include a third arched member and a fourth arched member.

6. The implant according to claim 5 , wherein the third arched member extends substantially parallel to and offset from the first arched member of the first bone contacting element; and

wherein the fourth arched member extends substantially parallel to and offset from the second arched member of the first bone contacting element.

7. The implant according to claim 5 , wherein the third arched member extends substantially at a first oblique angle with respect to the first arched member of the first bone contacting element; and

wherein the fourth arched member extends at a second oblique angle with respect to the second arched member of the first bone contacting element.

8. The implant according to claim 7 , wherein the first oblique angle is substantially equivalent to the second oblique angle.

9. The implant according to claim 8 , wherein the implant includes a central anterior-posterior axis extending along a centerline of the implant through the first body member and the second body member.

10. The implant according to claim 9 , wherein the first bone contacting element is substantially symmetrical with the second bone contacting element across the central anterior-posterior axis of the implant.

11. An implant, comprising:

a first body member and a second body member;

a first bone contacting element extending from the first body member to the second body member;

wherein the first bone contacting element includes a first arched member and a second arched member;

wherein the first arched member includes a first flat bone contacting region and the second arched member includes a second flat bone contacting region;

wherein the first flat bone contacting region has an oblong shape extending along a first axis;

wherein the second flat bone contacting region has an oblong shape extending along a second axis; and

wherein the first axis is parallel to and offset from the second axis.

12. The implant according to claim 11 , further including a second bone contacting element extending from the first body member to the second body member, the second bone contacting element including a third arched member and a fourth arched member;

wherein the third arched member includes a third flat bone contacting region and the fourth arched member includes a fourth flat bone contacting region;

wherein the third flat bone contacting region has an oblong shape extending along a third axis;

wherein the fourth flat bone contacting region has an oblong shape extending along a fourth axis; and

wherein the third axis is parallel to and offset from the fourth axis.

13. The implant according to claim 12 , wherein the third axis of the third oblong bone contacting region extends substantially parallel to and offset from the first axis of the first oblong bone contacting region; and

wherein the fourth axis of the fourth oblong bone contacting region extends substantially parallel to and offset from the second axis of the second oblong bone contacting region.

14. The implant according to claim 12 , wherein the third axis of the third oblong bone contacting region extends substantially at a first oblique angle with respect to the first axis of the first oblong bone contacting region; and

wherein the fourth axis of the fourth bone contacting region extends at a second oblique angle with respect to the second axis of the second oblong bone contacting region.

15. The implant according to claim 14 , wherein the first oblique angle is substantially equivalent to the second oblique angle.

16. The implant according to claim 15 , wherein the implant includes a central anterior-posterior axis extending along a centerline of the implant through the first body member and the second body member.

17. The implant according to claim 16 , wherein the first bone contacting element is substantially symmetrical with the second bone contacting element across the central anterior-posterior axis of the implant.

18. An implant, comprising:

a first body member and a second body member;

a first bone contacting element extending from the first body member to the second body member;

a second bone contacting element extending from the first body member to the second body member;

wherein the first bone contacting element includes a first arched member and a second arched member;

wherein the first arched member includes a first flat bone contacting region and the second arched member includes a second flat bone contacting region;

wherein the first flat bone contacting region has an oblong shape extending along a first axis;

wherein the second flat bone contacting region has an oblong shape extending along a second axis;

wherein the first axis is parallel to and offset from the second axis; and

wherein the second bone contacting element includes at least two arched members, wherein a first arched member of the at least two arched members is parallel to and offset from the first axis of the first flat bone contacting region of the first bone contacting element.

19. The implant according to claim 18 , wherein the at least two arched members includes a second arched member that extends substantially parallel to and offset from the second axis of the second flat bone contacting region of the first bone contacting element.

20. The implant according to claim 18 , wherein the implant includes a central anterior-posterior axis extending along a centerline of the implant through the first body member and the second body member; and

wherein both the first bone contacting element and the second bone contacting element are disposed completely on the same side of the central anterior-posterior axis as one another.