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. 2003 May 29;12(5):542–547. doi: 10.1007/s00586-003-0549-4

Fig. 3.

Fig. 3.

Steps required for pilot hole preparation with the TDG. A Engage the pedicle finder under the lamina. B Adjust the TDG to obtain the desired insertion point for drilling. C Adjust the TDG depending on the desired drilling angle in the sagittal plane. D Drill the pilot hole