Normalized (to intact) range-of-motion (ROM) outcomes.
| NPP + cPEEK | NPP + cAllograft | NPP + ncAllograft | TP + Allograft Cage | |||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| FE | 61% | 22% | 62% | 20% | 64% | 29% | 25% | 18% |
| LB | 55% | 32% | 52% | 18% | 57% | 38% | 36% | 28% |
| AR | 56% | 30% | 63% | 21% | 65% | 41% | 37% | 27% |
AR, axial rotation; FE, flexion/extension; LB, lateral bending; NPP + cAllograft, no-profile ACDF device with connected allograft implant body; NPP + cPEEK, no-profile ACDF device with connected PEEK implant body; NPP + ncAllograft, no-profile ACDF device with nonconnected allograft implant body; TP + Allograft Cage, standard anterior ACDF plate and PEEK interbody cage.