Product Overview

ALTERA™ is an articulating expandable TLIF spacer designed to increase disc height, restore lordosis, and maintain sagittal balance.

Features and Benefits

Continuous Expansion

Up to 4mm of continuous expansion to restore disc height and optimize endplate-to-endplate fit.

Minimal Insertion Height

Inserted at a reduced height to minimize impaction and preserve endplate integrity.

Optimal Placement

Integrated articulation provides steerable placement within the anterior disc space.


Research Study

Minimally invasive transforaminal lumbar interbody fusion with expandable versus static interbody devices: radiographic assessment of sagittal segmental and pelvic parameters

Hawasli et al. Neurosurg Focus 43 (2):E10, 2017.

Study | Summary Sheet

Research Study

Assessment of radiographic and clinical outcomes of an articulating expandable interbody cage in minimally invasive transforaminal lumbar interbody fusion for spondylolisthesis

Massie et al. Neurosurg Focus 44 (1):E8, 2018.

Study | Summary Sheet