Comparison of the force decay over time of four different brands of elastomeric chains (elongated to 25mm grey/transparent and closed/open): An in-vitro study.
Int Orthod
; 18(3): 538-545, 2020 Sep.
Article
en En
| MEDLINE
| ID: mdl-32536451
ABSTRACT
Elastomeric chains are widely used by orthodontists for incisor retraction and space closure. However, force degradation and permanent deformation are expected to occur. OBJECTIVES:
The present study was designed to compare the force degradation of closed, open, grey and transparent power chains from four orthodontic companies (American orthodontics® (AO®), Dentsply®, Ormco® and Rocky Mountain Orthodontics® (RMO®)) over time. MATERIALS ANDMETHODS:
Universal testing machine was used to measure the force of the power chains elongated to 25mm at 0hours, and after storage in artificial saliva at 24hours, 1 week, 2 weeks, 3 weeks, and 4 weeks. A Tukey's honestly significant difference test was performed.RESULTS:
Most of the power chains showed less than 30% of force decay at 24hours of elongation. The AO® transparent open elastomeric chains presented the lowest percentage of force remaining at almost all times 24hours (58.9%), 1 week (67.7%), 2 weeks (43.2%), 3 weeks (72.4%), and 4 weeks (63%). Most of the power chains had an increase of force measured after 2 weeks of storage in artificial saliva. Three of the sixteen groups (Ormco® grey open, RMO® grey and transparent closed) displayed an increase in the force at 4 weeks of elongation compared to the force registered at 0hours.CONCLUSION:
The results indicated that the force generated by elastomeric chains at 4 weeks remains optimal for a physiologic tooth movement.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aparatos Ortodóncicos
/
Estrés Mecánico
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Diseño de Aparato Ortodóncico
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Elasticidad
Límite:
Animals
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Humans
Idioma:
En
Revista:
Int Orthod
Asunto de la revista:
ORTODONTIA
Año:
2020
Tipo del documento:
Article
Pais de publicación:
FR
/
FRANCE
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FRANCIA
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FRANÇA