Article Figures & Data
Figures
- Figure 1
No-profile integrated fixation anterior cervical discectomy and fusion device demonstrating pronounced implant body height relative to plate height (left) and independently connected (nonaffixed) implant body (right).
- Figure 2
Fluoroscopic images of instrumented test specimens. (A) No-profile anterior cervical discectomy and fusion (npACDF) device with connected polyetheretherketone (PEEK) implant body. (B) npACDF device with connected allograft implant body. (C) npACDF device with nonconnected allograft implant body. (D) Standard anterior ACDF plate and PEEK interbody cage.
- Figure 3
Mean range-of-motion (ROM), relative to intact conditions, when loaded in flexion/extension under a pure moment of ±2.5 Nm. Bars represent the mean, and error bars are SD. Symbols denote significant differences (P < 0.05) between groups according to an ordinary 1-way analysis of variance with Bonferonni’s correction for multiple comparisons; PEEK, polyetheretherketone.
- Figure 4
Mean range-of-motion, relative to intact conditions, when loaded in lateral bending under a pure moment of ±2.5 Nm. Bars represent the mean, and error bars are SD. Symbols denote significant differences (P < 0.05) between groups according to an ordinary 1-way analysis of variance with Bonferonni’s correction for multiple comparisons; PEEK, polyetheretherketone.
- Figure 5
Mean range-of-motion, relative to intact conditions, when loaded in axial rotation under a pure moment of ±2.5 Nm. Bars represent the mean, and error bars are SD. Symbols denote significant differences (P < 0.05) between groups according to an ordinary 1-way analysis of variance with Bonferonni’s correction for multiple comparisons; PEEK, polyetheretherketone.
Tables
NPP + cPEEK NPP + cAllograft NPP + ncAllograft TP + Allograft Cage Intact ROM Construct ROM Intact ROM Construct ROM Intact ROM Construct ROM Intact ROM Construct ROM Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD FE 10.7 1.9 6.8 3.3 12.2 2.6 7.3 1.7 11.7 2.9 7.1 3.2 12.0 3.9 3.2 2.9 LB 8.9 3.0 5.7 4.7 9.3 2.2 4.8 2.1 9.4 2.4 5.2 3.9 9.3 2.8 3.7 3.1 AR 7.0 3.0 4.5 3.3 7.7 1.5 4.8 1.8 7.9 2.5 4.6 3.0 9.0 5.3 3.6 4.4 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.
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.
Case Age, y Sex BMI Level Preoperative VAS Score 12-mo VAS Score Preoperative NDI Score 12-mo NDI Score Interbody Fusion Subsidence 1 48 M 26.6 C6/7 8 2 50% 4% Yes No 2 73 M 30.4 C3/4 5 1 60% 26% Yes No 3 69 F 26.1 C5/6 6 2 34% 16% Yes No 4 58 M 28.5 C7/T1 5 0 52% 0% Yes No 5 64 M 29.8 C5/6 5 2 40% 12% Yes No 6 48 F 25.9 C5/6 6 0 22% 4% Yes No 7 58 M 23.3 C5/6 7 5 14% 16% Yes No 8 52 F 26.6 C5/6 7 0 40% 8% Yes Yes 9 48 F 20.4 C5/6 5 0 34% 0% Yes No 10 52 F 33.1 C6/7 8 0 32% 0% Yes No BMI, body mass index; NDI, Neck Disability Index; VAS, visual analog scale.
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