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Dental Materials Research Instruments

Oral Wear Simulator

This is the only machine found to produce realistic measurements of the two major wear mechanisms, abrasion and attrition, on each specimen, according to multiple round-robin studies. A ball-on-plane arrangement transmits a low force during sliding of 20N, followed by a 90N pulse at the end. The two-phase wear pattern is then measured.

Wear Regimen

Horizontal translation (10mm) with vertical

dual-phase force routine.

Abrasion Phase: 15-40N vertical load, 8mm duration

Attrition Phase: 50-90N vertical load, 2mm duration

Force Adjustment: solid state power controls

Speed: 10 to 90 cycles per minute

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Results from numerous studies have found a strong correlation to occlusal-contact and contact-free measurements from in vivo studies.


Number of Specimen Chambers: Four

Chamber Type: Acrylic cylinders with O-ring seals

Specimen Dimensions: 25mm diameter x 4-10mm height

Counter Specimen Type: 6mm diameter ceramic ball attached to #10 nylon screw


Motor: ¼ hp Bison permanent magnet motor with solid-state speed control

Solenoids: Dual continuous wound high precision tubular push-only style

Counter: Veeder-Root predetermined shut-off counter with 1,000,000 cycle limit.

Start-up kit

All necessary hand tools including 6mm allen wrench, 4mm and 8mm open-end wrench. A supply of 100 ceramic balls and nylon screws, and 50 acrylic specimen rings. Instruction Manual


Power supply: 1.2 kW at 110v.

Space: 70 cm wide by 30 cm deep by 50cm high