Navigation of artificial disc replacement: evaluation in a cadaver study

Figures & data

Figure 1. The CHARITÉ™ artificial disc.

Figure 2. Positioning of the artificial disc prosthesis with the navigation software.

Figure 3. Incision for the ventral trans- or extraperitoneal surgical approach for the disc implantation.

Figure 4. Light-reflecting markers attached to the disc insertion forceps.

Figure 5. Placement of the reference unit and marker array.

Figure 6. Matching and matching control.

Table I.  Deviation from the preoperatively planned ideal position of the artificial disc. Numbers in bold indicate suboptimally placed prostheses.

Coronal	Sagittal	Craniocaudal
0.666	2.116	2.2877
2.321	4.364	4.5333
1.5274	2.7409	2.5779
1.199	3.076	2.5959
0.306	0.687	1.5732
0.735	2.281	4.0132
0.139	4.712	2.6468
0.141	1.469	3.5413
0.444	2.675	3.5821
1.296	2.117	2.8212
1.022	1.899	1.9783
0.494	0.706	2.9806
0.863	0.728	0.7427

Figure 7. Placement in the coronal plane is significantly better than in the sagittal or craniocaudal planes.