Paragraph Number

48

Thus, the niche 130 and the ears 132 may cooperate to define a detent mechanism as described above. Via such a detent mechanism, the surgeon may be sure the rotatable structure 112 has been fully rotated into the desired configuration. Further, the engagement of niche 130 and the ear 132 pertaining to the locked orientation may tend to retain the rotatable structure in the locked orientation, further ensuring that the rotatable structure 112 does not migrate to the unlocked orientation after the surgical procedure is complete.

Added by DJM 5 2021