Analysis of mechanical properties and forces produced by transpalatal bars made from low-nickel alloy
Braz. j. oral sci
;
9(1): 16-19, Jan.-Mar. 2010. ilus, tab, graf
Artículo
en Inglés
| LILACS, BBO
| ID: lil-578040
ABSTRACT
Aim:
This study evaluated assess the mechanical properties and forces produced by transpalatal bars made from low-nickel alloy.Methods:
Using a template, a single operator made all transpalatal bars from 0.032" and 0.036" wires of two different alloys, thus originating four groups, namely A8 (0.032" conventional stainless steel), B8 (0.032" low-nickel stainless steel), A9 (0.036" conventional stainless steel), and B9 (0.036" low-nickel stainless steel). The bars were then activated and mounted onto a device developed to serve as a support for mechanical assay in a universal testing machine (Emic DL 10.000). The values of resilience and ductility were obtained using the Origin 8 software.Results:
No statistically significant differences (P > 0.05) were observed between Groups A8 and B8 neither between A9 and B9 for 0.5-, 1.0-, and 5-mm deformations. However, statistically significant differences (P < 0.05) were found in all groups for 15-mm deformation. Groups B8 and B9 showed greater ductility and resilience compared to groups A8 and A9, respectively.Conclusions:
Low-nickel stainless steel transpalatal bars release the same amount of force for activations less than 10 mm compared to those made from conventional stainless steel. Mechanically, the low-nickel stainless steel bars are more ductile and resilient.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Aparatos Ortodóncicos
/
Acero Inoxidable
/
Aleaciones de Cromo
Idioma:
Inglés
Revista:
Braz. j. oral sci
Asunto de la revista:
Odontología
Año:
2010
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Federal University of Rio de Janeiro/BR
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