Photocuring resin composition for orthodontics

摘要

A photocuring resin composition for orthodontics is disclosed, comprising: (a) 5 DIFFERENCE 50% by weight of a urethane bond-free (meth)acrylate having an average molecular weight of 100 DIFFERENCE 300 and having at least one unsaturated double bond; (b) 10 DIFFERENCE 60% by weight of a urethane bond-containing (meth)acrylate having an average molecular weight of 300 DIFFERENCE 5,000 and having at least one unsaturated double bond; (c) 5 DIFFERENCE 30% by weight of a crosslinked polyurethane powder; (d) 10 DIFFERENCE 50% by weight of an inorganic filler; and (e) 0.03 DIFFERENCE 3% by weight of a photocuring initiator. By using the resin composition for orthodontics of the invention, not only an orthodontic appliance with a good precision can be directly prepared in the oral cavity of a patient within a short period of time without using a gnathostatic model, but also the resulting orthodontic appliance has a proper elasticity so that a thorough retention strength can be obtained by only utilizing a tooth undercut without imparting a retention structure such as a clasp.