A-dec 521 Dental Stool

Superior Comfort and Ergonomics

  • The A-dec 521 Dental Stool supports a positive posture.
  • The A-dec 521 dental stool comes with or without armrests

The A-dec 500 dentists stool offer a dynamic seating system that conforms and moves with the body. With years of research behind it, the innovative A-dec 500 stool is strategically engineered to help you feel your best, so you can perform your best.

Dynamic Support

Three layers of flexible seating conform to your every shift and move. Four unique performance zones allow good blood flow to the legs, while setting up the lower lumbar for a proper, healthy torso posture all day long.

Healthy Seated Posture

Our dynamic seating system helps your spine maintain a healthy S-shape. This ergonomic seated position lets you enjoy both comfort and improved performance.

Easy Adjustment

Correct posture reduces stress on joints and the spine and provides better circulation for your feet and extremities. The A-dec 500 stool’s easy-to-follow numbered paddles encourage customised adjustments—especially important if there are multiple users.

A-dec are a world leader of dental treatments units and dental equipment.

Tilt Seat

Distributes weight from seat to feet allowing proper circulation.

Contoured Backrest

Cradles the spine, while encouraging blood flow. Contoured backrest is standard on the A-dec 500 doctor’s stool and optional on the A-dec 500 assistant’s stool.

Whisper Quiet Casters

New design provides smooth, ultra-quiet movement on both carpet and hard flooring.

Adjustment Controls

Labeled paddles are easy to access for quick adjustments and easy cleaning.

Backrest Height Control

A push button makes access and one-handed adjustment easy.


Minimal seams make clean up easy.

Two Cyclinder Heights

Measure from hips to the feet. Above 34" - choose tall cylinder. Under 34" - choose short cylinder.

The A-dec 521 Dental Stool supports a positive posture.
A-dec 411 Dental Chair
Range of Lift Height

13.75" to 31.5" (349cm to 800cm) Low Point 14.75" (375mm) with dual mounting.

Total Length at Maximum Extension

72" (1829mm)

Thin Flexible Backrest

1" (25mm)

Chair Swivel

60" (30 degree each side of the centre)

Left/Right Convertible


Dual Articulating Gliding Headrest


Integrated 300 Watt power supply


Fingertip or foot control


Drive System

Hybrid Drive (electromechanical tilt, hydraulic base)

Upholstery Options

Sewn or Seamless

Monitor Mount Options

Light, Monitor Arm

Delivery Systems for the A-dec 400 Dental Chair
Control Block

Standard 3-position block

Left/ Right Conversion


Handpiece Holder Positions


Brake Handle

1 Standard, 2nd optional

Delux Touchpad Available


Quad-Voltage Intraoral light source


Foot Control

Wet/dry, wet/dry with chip blower or lever

Balanced Flexarm with Air Brake

Yes, except A-dec 336


Balanced flexarm with air brake

A-dec 333 - Continental Radius Mount

A-dec 335 - Continental Support Mount

A-dec 332 - Traditional Radius Mount

A-dec 334 - Traditional Support Mount

Manual Height Adjustment

A-dec 336 - Traditional Radius Mount

Integrated Saliva Ejector

Optional in select markets on A-dec 336

Site survey: Recommended

The A-dec 521 Doctor's Stool includes the following upgrade options:

 Upgrade Type
A-dec 521 Doctor's Stool Swing-out Armrests


A-dec Upholstery Brochure

Dental Practice Relocation

”I would have no hesitation in recommending Hague for their knowledge, professionalism, delivery and support having worked with them on such a large project.”

Adam Thorne, Centre for Dental Excellence

Squat Practice Development

”When setting up a new dental practice, it can be a very challenging time, and Hague’s part exchange service enabled me to manage my expenditure, and upgrade when I was ready.”

Neel Jaiswal, Neel Dentistry

Practice Design Centre
Visit our extensive showroom, and speak to our refurbishment experts, about creating your ideal working space. Compare equipment (New and Used) and furniture from our world leading brands. Talk interior design and let us help inspire you.

Appointments include weekends and evenings.

A-dec 400 Dental Chair

Equipment Consultation
Talk to the team about a demonstration at your practice for this product. Working alongside the UK dental industry's best manufacturers we will provide honest independent adivce.

Equipment trials available on some items.

Hague Dental Team understand the financial demands on any practice. The extensive funds required for any surgery refurbishment, or investment required on the development of a new squat practice. We work alongside leading finance brokers that support the dental industry, to ensure we can quickly and easily help you with finance options. Speak to us about this in more detail.

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