Color stability and force decay of clear orthodontic elastomeric chains: An in vitro study

Abdullah M Aldrees; Sahal A Al-Foraidi; Mohammed S Murayshed; Khalid A Almoammar

doi:10.1016/j.ortho.2015.06.003

Color stability and force decay of clear orthodontic elastomeric chains: An in vitro study

Int Orthod. 2015 Sep;13(3):287-301. doi: 10.1016/j.ortho.2015.06.003. Epub 2015 Aug 12.

[Article in English, French]

Authors

Abdullah M Aldrees¹, Sahal A Al-Foraidi², Mohammed S Murayshed³, Khalid A Almoammar⁴

Affiliations

¹ Division of Orthodontics, Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, P.O. Box 60169-38, Riyadh 11545, Saudi Arabia. Electronic address: amaldrees@ksu.edu.sa.
² Department of Pediatric Dentistry and Orthodontics, College of Dentistry, Taibah University, AlMadinah AlMonawarah, Saudi Arabia.
³ Department of Prosthetic Dental Sciences, College of Dentistry, Sattam bin Abdulaziz University, AlKharj, Saudi Arabia.
⁴ Division of Orthodontics, Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, P.O. Box 60169-38, Riyadh 11545, Saudi Arabia.

PMID: 26277455
DOI: 10.1016/j.ortho.2015.06.003

Abstract

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 250 ml amounts) for 72 h.

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.

Keywords: Color stability; Elastomeric chain; Force decay.

Publication types

Comparative Study

MeSH terms

Carbonated Beverages
Coffee
Color
Elasticity
Elastomers / chemistry*
Humans
Materials Testing
Orthodontic Appliance Design
Orthodontic Appliances*
Spectrophotometry / instrumentation
Stress, Mechanical
Surface Properties
Tea
Time Factors
Wine

Substances

Coffee
Elastomers
Tea