Zero-P. Zero profile anterior cervical interbody fusion (ACIF) device.

Preoperative PlanningInstrumentsX000069X000070X000071X-ray Template for Zero-P, parallelX-ray Template for Zero-P, convexX-ray Template for Zero-P, lordoticPrior to surgery, determine the desired surgical approach andestimate the appropriate Zero-P spacer size. An initial estimateof the size can be made by comparing the x-ray templatefor Zero-P with the adjacent intervertebral discs on alateral radiograph.Definitive information on the appropriate size should be obtainedby measuring the distracted disc space during the operationusing the trial spacers.Notes– The height of the spacer indicated on the template is approximately0.8 mm shorter than that of the actual spacerto account for penetration of the teeth into the vertebralend plate.– With the segment fully distracted, the Zero-P must fitfirmly between the end plates before locking head screwsare inserted. When rocking the aiming device backwardand forward in a cranial to caudal direction, no toggling ofthe implant should be evident.– It is recommended to select the maximum implant size inorder to optimize the stability of the segment through tensionin the annulus fibrosus and longitudinal ligaments.– Template images are 115% of actual implant size to correspondto typical radiographic magnification.Synthes 7