Patent ID: 11903847
Assignee: ZIMMER BIOMET SPINE, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. A method for implant sizing, the method comprising:
selecting an implant size including obtaining a pressure sensitive trial implant corresponding to the selected implant size;
preparing a trialing instrument including coupling the pressure sensitive trial implant to a distal end of an elongate shaft portion of the trialing instrument, the pressure sensitive trial implant having a non-adjustable thickness between a superior end plate exterior surface and a separate inferior end plate exterior surface, the pressure sensitive trial implant including one or more lateral side surfaces between the superior end plate exterior surface and the inferior end plate exterior surface, wherein at least one of the superior end plate exterior surface and the inferior end plate exterior surface of the pressure sensitive trial implant is covered in a pressure sensitive film, and wherein the pressure sensitive film is further disposed on at least a portion of the one or more lateral side surfaces;
trialing the pressure sensitive trial implant in an intervertebral disc space between a first vertebral body and a second vertebral body, the intervertebral disc space prepared to receive an intervertebral implant; and
determining whether the selected implant size is correct based at least in part on comparing a state of the pressure sensitive film disposed on at least one of the superior end plate exterior surface and the inferior end plate exterior surface of the pressure sensitive trial implant to a known standard, wherein the pressure sensitive film is operable to indicate whether a predetermined target pressure is achieved following contact of a first end plate of the first vertebral body to the superior end plate exterior surface, and further following contact of a second end plate of the second vertebral body to the inferior end plate exterior surface, wherein the predetermined target pressure corresponds to the selected implant size.