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. 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
Description: 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
Force Triggering: non-contact eddy current sensors,
through logic circuit and solid state relays.
Speed: 10 to 90 cycles per minute
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.
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