Photoelastic analysis of forces generated by T-loop springs made with stainless steel or titanium-molybdenum alloy.
Am J Orthod Dentofacial Orthop
; 140(3): e123-8, 2011 Sep.
Article
en En
| MEDLINE
| ID: mdl-21889060
INTRODUCTION: The purpose of this study was to use photoelastic analysis to compare the system of forces generated by retraction T-loop springs made with stainless steel and titanium-molybdenum alloy (TMA) (Ormco, Glendora, Calif) with photoelastic analysis. METHODS: Three photoelastic models were used to evaluate retraction T-loop springs with the same preactivations in 2 groups. In group 1, the loop was constructed with a stainless steel wire, and 2 helicoids were incorporated on top of the T-loop; in group 2, it was made with TMA and no helicoids. RESULTS: Upon using the qualitative analysis of the fringe order in the photoelastic model, it was observed that the magnitude of force generated by the springs in group 1 was significantly higher than that in group 2. However, both had symmetry for the active and reactive units related to the system of force. CONCLUSIONS: Both springs had the same mechanical characteristics. TMA springs showed lower force levels.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Alambres para Ortodoncia
/
Aleaciones Dentales
/
Análisis del Estrés Dental
Tipo de estudio:
Prognostic_studies
/
Qualitative_research
Límite:
Humans
Idioma:
En
Revista:
Am J Orthod Dentofacial Orthop
Asunto de la revista:
ODONTOLOGIA
/
ORTODONTIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Estados Unidos