title: Development of an orthodontic elastic material using EMA-based resin combined with 1-butanol.
abstract: For the development of new orthodontic elastic material, 1-butanol was added to PEMA-TA/HX resin. In the present study, basic experiments to reveal the mechanical properties of the materials were conducted. FT-IR spectroscopy showed that addition of 1-butanol did not cause any chemical changes to the PEMA-TA/HX resin. After addition of 1-butanol to PEMA-TA/HX resin, the modulus of elasticity, instantaneous modulus elasticity, retarded elasticity and viscosity were lowered in a concentration-dependent manner, whereas the elastic strain was increased in a concentration-dependent manner. Moreover, on the application of heat a shape-memory effect was observed. These results suggest that the modulus of elasticity of this material can be adjusted. Additionally, this material has the ability to restore force as a function of its shape-memory effect in cases of plastic deformation at the insertion of appliances. This new orthodontic elastic material has the potential to be clinically effective in orthodontic treatment.
authors.affiliation: Department of Orthodontics, School of Dentistry, Aichi-Gakuin University, 2-11 Suemori-dori, Chikusa-ku, Nagoya 464-8651, Japan. takehiro@dpc.agu.ac.jp
authors.forename: Takehiro
authors.initials: T
authors.lastname: Masuda
authors.forename: Ken
authors.initials: K
authors.lastname: Miyazawa
authors.forename: Naoya
authors.initials: N
authors.lastname: Ueda
authors.forename: Yuki
authors.initials: Y
authors.lastname: Hata
authors.forename: Tatsushi
authors.initials: T
authors.lastname: Kawai
authors.forename: Shigemi
authors.initials: S
authors.lastname: Goto
mesh_terms: D020001:1-Butanol / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D055119:Elastic Modulus; D004548:Elasticity; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry*; D016382:Orthodontic Appliance Design; D018583:Pliability; D058105:Polymerization; D017550:Spectroscopy, Fourier Transform Infrared; D013314:Stress, Mechanical; D013386:Succinates / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014783:Viscosity; D014867:Water / Q000737:chemistry
chemical_list: D008689:Methacrylates; D008768:Methylmethacrylates; D013386:Succinates; D014867:Water; D020001:1-Butanol; C009931:poly(ethylmethacrylate); C090921:1,6-hexanediol dimethacrylate; C041105:monomethyl succinate