Leinfelder Wear Simulator was used to simulate the wear in vitro KeySplint Soft when stored at 37°C for 24 hours followed by placement in PMMA beads slurry and then exposed to localized wear using stainless steel. Volume loss(mm3) and maximum depth (μ) was calculated after 400,000 cycles which is said to be equal to 3 years of clinical wear.
Wear conditions in removable dental appliances can be categorized into generalized and localized conditions, where wear due to the masticatory forces is said to be generalized and direct tooth to material contact is localized. This study indicates that KeySplint Soft™ material wears less in both conditions in vitro.
KeySplint Soft™ changes its properties with temperature and thus becomes more pliable when in contact with the body temperature, reducing the chances of fracture. KeySplint Soft does not show any cracking on magnification, thus suggesting energy absorbing behavior. Furthermore, this material when subjected to continuous temperature change intraorally and at room temperature enhances the longevity of the appliance.
When DigiSplint is warmed up under hot water it becomes flexible.
DigiSplint trims like hard acrylic.