Abstract:
BACKGROUND. Nickel-titanium alloys are "smart" intermetallic
materials, defined by 2 notions:
• with shape memory effect (SMA)
• superelastic (SE). AIM. To evaluate the medico-technical qualities,
varieties and use in orthodontics. MATERIAL AND METHODS. The study of the literature with reference
to orthodontic biomaterials and the
catalogues of the manufacturing
companies revealed that Ni-Ti alloys are
of choice in making superelastic and SMA
orthodontic wires, springs, clips of some
self-ligating brackets.
RESULTS. The Ni-Ti wires were classified according to:
• the effect produced
similar to rubber, shape memory, superelastic;
• the force produced
austenite, martensite, stabilized. Superelastics:
Rematitan; DuoForce CuNiTi, Titanol Triple Force;
Nanda Braided CuNiTi; NT3 SE NiTi; Nitinol SE;
TruFlex NiTi; CuNiTi 27°C, etc.
Thermo-active, SMA-effect:
Tensic, Equire - thermo-active; BioStarter;
Therma-Ti, TriTanium Memory Wire;
Neo-Sentalloy; Tru-FlexThermal Ni; CuNiTi 40°C. CONCLUSIONS. The Ni-Ti alloys are found in orthodontic
treatment in the form of wires used for the
alignment and leveling of dental arches, springs
for closing/opening interdental spaces, easily
maneuverable clips in self-ligating brackets.
The shape memory effect allows the deformed
wires to return by heating - martensitic
transformation (equal to that of the body).
Description:
Department of Orthodontics, SUMPh „Nicolae Testemițanu”, Chisinau, Republic of Moldova,
Department of Maxillofacial Surgery and Pedodontics „Ion Lupan”, SUMPh „Nicolae Testemițanu”, Congresul consacrat aniversării a 75-a de la fondarea Universității de Stat de Medicină și Farmacie „Nicolae Testemițanu” din Republica Moldova, Ziua internațională a științei pentru pace și dezvoltare