Which TLSO brace uses a 3-point design to control flexion and extension?

• A. Provides max support by spreading forces over larger area
• B. Controls flexion and extension through 3-pt design
• C. Minimal control for CxSp pain
• D. Limits flexion but encourages hyperextension

Answer: (B)

The key idea is how a spinal brace uses three-point bending to limit motion in the sagittal plane. In a three-point design, two pressures act on either side of the targeted spinal segment while a third pressure sits at the apex. This arrangement creates a bending moment that resists forward bending (flexion) and backward bending (extension), effectively stabilizing the thoracic–lumbar region.

A TLSO that relies on this three-point mechanism is specifically designed to control flexion and extension by producing those targeted forces at the right locations, rather than simply distributing pressure over a wide area. That’s why the statement describing control of flexion and extension through a 3-point design is the best fit.

Other descriptions talk about spreading forces, providing minimal control for neck pain, or limiting flexion while allowing hyperextension, which don’t capture the deliberate three-point moment that restricts sagittal motion in the TLSO.