A-dec 400 Dental Chair

Accessible. Strong. Style.

Challenge: Besides a dental chair that's comfortable for both you and your patient, you need a robust dental chair that you can rely on for years of consistent performance.

Solution: A-dec 400 dental chair.

Instead of sacrificing ergonomic access to the oral cavity for patient comfort, get both with the A-dec 400 dental chair.

And when you add robust construction, contemporary styling, and left/right versatility, you gain a system that is the best long-term value available on the market.

A-dec 400, a thoughtful approach to dental system design.


Pure comfort for you and your patients. Patient comfort is paramount in reducing anxiety. The A-dec 400 dental chair design helps put your patients at ease.

The key to productivity and career longevity is remaining comfortable while you work. This is why A-dec 400 is designed to keep your movement fluid and ergonomically aligned.

Ergonomic delivery system options. The A-dec 400 dental chair and A-dec 300 delivery system offer the perfect combination of compact maneuverability, access, and style.

The A-dec 300 Traditional delivery system and the A-dec 300 Continental delivery system position your handpieces and ancillaries at your fingertips, eliminating unnecessary movement while keeping you focused.

Left-right versatility for added productivity. The Radius-style delivery systems, cuspidor, and A-dec 500 assistant's instrumentation quickly and easily rotate around the chair for complete left/right compatibility.


Ultra-thin backrest that "flexes" (1", 25 mm). Enables you to tuck your knees under the chair providing ergonomic access to the oral cavity.

Double-articulating gliding headrests. Adjusts easily for optimal patient positioning. Available in locking knob and lever release styles.

Full height range. Offers a range from 13.75" to 31.25" (349 mm to 794 mm). Low point 14.75" (375 mm) with dual mounting.

2-position armrests. Combines comfortable arm/elbow support with a robust load-bearing design for easy patient entry and exit.

60º swivel with brake. Allows 30º rotation on each side of center.

Hybrid chair lift system. Combines the power of a hydraulic base and the smoothness of an electro-mechanical tilt, allowing simultaneous movement for quicker patient positioning.

Integrated 300-watt power supply. Provides more than enough power for the whole system; powers light and additional ancillary devices.


Delivery Systems

Four choices for ergonomic delivery of your handpieces and accessories.

Radius-style, chair-mounted systems: A-dec 300 Traditional delivery system and A-dec 300 Continental delivery system.

Cabinet-mounted systems: A-dec 500 12 o’clock duo delivery system and A-dec 500 side delivery system.

Dental Light

Whether your choice is A-dec LED or A-dec halogen, get balanced intensity and a uniform light pattern without unwanted shadows.

Options include the A-dec 500 LED dental light, A-dec 500 halogen dental light, and A-dec 300 LED dental light.

Chair-Mounted Assistant’s Instrumentation

A-dec 500 Assistant’s instrumentation provides comfortable access to vacuum instruments and accessories. Rotates around the dental chair for left/right versatility.

Monitor Mount

The A-dec Radius-style monitor mount (chairside) offers multiple viewing angles for comfortable patient viewing from the seated and supine positions.


Made of stain-resistant vitreous china. Rotates ±90° for better patient access. The timed cup fill and bowl rinse functions are programmable at the touchpad.


A-dec Upholstery Colours

A-dec 400 Brochure

A‑dec Treatment Room Brochure

A‑dec Dental Chair and Stool Upholstery Brochure

Equipment Maintenance Checklist

Upholstery Maintenance Guide

A‑dec Equipment Asepsis Guide