Color stability and force decay of clear orthodontic elastomeric chains: An in vitro study - 14/09/15
, Sahal A. Al-Foraidi b, Mohammed S. Murayshed c, Khalid A. Almoammar aBienvenue sur EM-consulte, la référence des professionnels de santé.
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Summary |
Objective |
To compare the percentage force decay of clear and semi-clear elastomeric chain products from eight different manufacturers and to evaluate the amount of discoloration after immersion in colored dietary media of the same elastomeric chain products.
Material and methods |
An in vitro study was designed using an electronic force gauge to measure six samples from each of 19 types of elastomeric chains stretched for a period of four weeks. A spectrophotometer was used to measure the color of each specimen (10 of each type) at baseline and after being soaked in a dietary medium (coffee, tea, cola, and wine in 250ml amounts) for 72h.
Results |
There was a significant difference in the percentage of the lost initial force between all the tested E-chains (P<0.001). ANOVA shows a significant difference in the amount of discoloration between the E-chain types (P<0.001). Semi-clear (tooth-color/pearl/obscure) E-chain types (TP-ToothC, OrthO-Pearl, GAC-SiliPearl, 3M-Obscure) present significantly less change in color than clear E-chains of the same brand (TP-Clear, OrthoO-Clear, GAC-SiliClear, 3M-Clear).
Conclusions |
Significant differences in the mean percentage force decay between the 19 studied clear elastomeric chain types were present. AO-Memory and Ormco maintained most of their original force at the end of the four-week interval. Significant differences in discoloration also exist between the various types of E-chains. TP Orthodontics (Tooth-Colored, SuperSlick, Clear) and Ortho Organizers (Pearl) showed the least discoloration.
Le texte complet de cet article est disponible en PDF.Key-words : Elastomeric chain, Color stability, Force decay
Plan
Vol 13 - N° 3
P. 287-301 - septembre 2015 Retour au numéro
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