and the bone tissue can be subsequently re used as graft volume after the surgical procedure is completed trajectory control sleeve 200 has a surface 201 adapted to be in intimate contact with and be co planar to an anterior facing surface 101 of a bone plate implant device 100 after engaging the device as in fig4 so as to assure that the axial distance d is well established and controlled the trajectory control sleeve 200 further has an annular abutting surface 203 surrounding the opening of the internal cylinder 202 the surface being adapted to positively engage a corresponding feature such as a flange or collar of the drill so as to prevent its over penetration into the vertebral body this abutment may be internal or external to the guide device as shown in fig4 and fig3 a respectively trajectory control sleeve 200 also has an engaging and interlocking feature 204 adapted to detachably engage a corresponding feature 105 see fig5 on the implantable bone plate 100 the trajectory control sleeve 200 is further generally adapted to protect surrounding vascular and soft tissue from accidental injury or cutting by providing a solid protective sheath around the sharp edges of the drill while it is operating fig4 and 5 show a perspective view and side view respectively of trajectory control sleeve 200 and an implantable bone plate 100 in their mutually interlocked positions fig4 shows the internal cylinder 202 for providing access guiding and controlling.