Breakthroughs in modern spine research

and the development of new therapeutic

and curative techniques and technologies

require an efficient and biomechanically

accurate means of obtaining reliable test

data.To meet this challenge, Applied Test

Systems (ATS) has developed the ST21 and

the ST21-TT Biomechanical Spine Test

System, capable of performing

flexion/extension, lateral bending, and

torsion testing of cadaveric spine

specimens in physiological loading

conditions that simulate natural movement

of the human spine through a full range of

motion.The ST21 has been developed in

close cooperation with major U.S. research

universities to provide an improved testing

setup that offers unhindered specimen

access and unconstrained movements,

resulting in superior test data and more

reliable testing over a wider range of

specimens, for solid results you and your

team can depend on.

benchST21 Biomechanical Spine Test System

Key Features

› A sturdy two-column frame with an offset testing area provides large specimen capacity and 360° access for efficient test setup and the use of various measurement devices.

› Precision torque application provides un-restricted motion even on specimens with considerable movement (e.g., cervical) and supports high-demand cyclic testing in torsion, bending, and axial directions.

› Crossheads are counterbalanced using constant-force springs and are mounted on roller-bearing slides with position locks to allow the vertical position of the cross-heads to be adjusted quickly and safely, while optional lateral adjustment of the crossheads permits numerous test setups.

› A proprietary computer control system collects data that easily integrates into several popular motion-capture systems for rapid analysis, graphing, and report generation. Testing routines and pro-cedures can be programmed and stored for repeat testing, and software includes multilingual capabilities.


20 Nm (14.75 ft.-lb.) torque capacity in both torsion and flexion/extension drives.

76.2 to 132.1 cm (30 to 52 in.) specimen mounting height (adjustable).

180° range of bending/flexion/extension load application.

Torsion drive movement range:

– X-axis (side-to-side): 31.8 cm (12.5 in.)

– Y-axis (forward/back): 29.2 cm (11.5 in.)

– Z-axis (up/down): 14.0 cm (5.5 in.)

Bending/flexion/extension drive range:

– X-axis (side-to-side): 31.8 cm (12.5 in.)

– Y-axis (forward/back): 17.8 cm (7.0 in.)

– Z-axis (up/down): 14.0 cm (5.5 in.)

Products Menu

Rentals Menu