Table 2 GSSS description.

From: Implementation of a three-dimensional (3D) robotic digital microscope (AEOS) in spinal procedures

Level

Basic

Moderate

Advanced

Spine procedure

1–2 level/-s of lumbar decompression

Lumbar discectomy

Anterior cervical discectomy and fusion (ACDF) /total disc replacement (TDR)

Posterior instrumentation or spondylodesis

Extreme lateral interbody fusion (XLIF)

Complex spondylodesis or spine reconstruction > 3 levels

Tumor resection

Score

1

3

6