Paragraph Number

93

Continuing with FIGS. 14-16D, the post 1030 may have an articulation surface 1031 extending around the post 1030 on the medial, posterior, lateral, and anterior aspects of the post 1030. The articulation surface 1031 may include a medial articulation surface 1032, a lateral articulation surface 1034, an anterior post surface 1036, and a posterior articulation surface 1042. The medial and lateral articulation surfaces 1032, 1034 may be non-parallel to one another and taper inward from the post superior end 1040 to the post base 1038 relative to an insert midline vertical axis 1002, as shown in FIGS. 16A and 16B. As shown in FIG. 16A, an angle θ between the vertical axis 1002 and each tapered surface 1032, 1034 may be about 6.5°, in at least one embodiment. Since the post 1030 may be bilaterally symmetrical, the angle θ may be the same on both the medial and lateral sides 1032, 1034 of the post 1030. In other embodiments of the disclosure, angle θ may range from about 6° to 11° degrees. The medial articulation surface 1032 may be continuous with the medial condylar articulation surface 1025, and the lateral articulation surface 1034 may be continuous with the lateral condylar articulation surface 1027. The anterior post surface 1036 may extend between the medial and lateral surfaces 1032, 1034 and may be convexly rounded. The anterior post surface 1036 may also taper outward from the post superior end 1040 to the post base 38 relative to the insert midline vertical axis 1002, as best seen in FIG. 16D. In other embodiments of the PS insert 1012, the anterior post surface 1036 may include less taper, more taper, and/or no taper. A midline medial-lateral axis 1004 and a mid-line anterior-posterior axis 1006 are also shown.

Added by DJM 1 2022