The ornamental design for a spinaldisc implant, as shown and described.
FIG. 1 is a front-top perspective view of a spinal disc implant showing my new design;
FIG. 2 is a front-bottom perspective view thereof;
FIG. 3 is a rear-top perspective view thereof;
FIG. 4 is a rear-bottom perspective view thereof;
FIG. 5 is a front elevational view thereof with the rear elevational view being mirrored thereto;
FIG. 6 is a left elevational view thereof;
FIG. 7 is a right elevational view thereof; and,
FIG. 8 is a top plan view thereof with the bottom plan view being mirrored thereto.
The broken lines showing the fastener holes shown in FIGS. 1-7 are included for the purpose of showing environmental structure and form no part of the claimed design.