Paragraph Number

237

In certain embodiments, the bone engagement opening 936 includes the bone engagement surface 922. Where the bone engagement opening 936 includes the bone engagement surface 922 the matching of the bone engagement surface 922 to one or more surfaces of one or more bones can provide a further assurance to a surgeon that the navigation guide 900 is precisely positioned in a position desired. As illustrated in FIG. 9C, the bone engagement opening(s) 936, bone engagement surface 922, and/or a registration key can cooperate such that the navigation guide 900 fits like a puzzle piece onto and/or within anatomy of a patient. Consequently, a surgeon can have high assurance that the navigation guide 900 has been positioned in the location desired and/or designed and/or preplanned. In another embodiment, the bone engagement opening 936 may not include a bone engagement surface 922 and instead the bone engagement opening 936 may include a recess, cavity, depression, or the like and a smooth surface on an inferior side 918 of the body 906.

Added by DJM Jan 2024