The present invention relates to an expandable prosthetic implant device for engagement between vertebrae generally comprising an inner member, outer member, and gear member positioned coaxial with respect to each other such that the inner and outer members are moveable relative to each other along an axis. An instruction decoder identifies if the memory address associated with the preload instruction matches a null value and suppresses the preload operation if the memory address does match the null value. Then, the subset of results are merged in one logical index server to generate a merged result. The method employed allows memory to be allocated and deallocated in single bit plane increments. In some embodiments a risk-assessment output is provided based on a safety threshold or predetermined intrusion level of EMR exposure.