Oral Wear Simulator

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A comparison of the two-phase loading routine of the Proto-tech Wear Simulator vs a leading competitor, as reported at www.dentalmaterialsblog.com
This is the leading oral wear simulator which research has found to produce and simulate realistic measurements of the two major wear mechanisms, abrasion and attrition on each specimen. A ball-on-plane arrangement transmits a low force during sliding of 20N, followed by a 90N pulse at the end of the pass to produce a revolutionary slide-and-clench action. The two-phase wear pattern is then measured. Developed at OHSU, results from numerous round robin studies have found a strong correlation to occlusal-contact and contact-free measurements from in vivo studies. The system has been used by numerous institutes and manufacturers to characterize wear of composites, adhesives, ceramics, amalgams, and natural dentition.

Specifications:
  • Number of Specimen Chambers: Four
  • Chamber Type: Acrylic cylinders with O-ring seals
  • Specimen Dimensions: 25 mm diameter x 4-10 mm height
  • Counter Specimen Type: 2-9 mm diameter ceramic ball.

Wear Regimen:
  • Description: horizontal translation (9.0mm) with vertical
  • dual-phase force routine.
  • Abrasion Phase: 15-40 N vertical load, 7 mm duration
  • Attrition Phase: 50-90 N vertical load, 2 mm 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

Hardware:
  • 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 6 mm allen wrench, 4 mm and 8 mm open-end wrench. A supply of 100 ceramic balls and nylon screws, and 50 acrylic specimen rings. Instruction Manual.

Requirements:
  • Power supply: 1.2 kW at 110 or 220 v.
  • Space: 70 cm wide by 30 cm deep by 50 cm high

Here is a list of studies performed using the OHSU Oral Wear Simulator. LINK