Discoloration and force degradation of orthodontic elastomeric ligatures
ABSTRACT OBJECTIVE: The aim of the present study was to evaluate color changes and force degradation of orthodontic elastomeric ligatures in different stretching patterns during a 8-weeks period. METHODS: Two elastomers with the minimum and two with the maximum color changing, and gray elastomers...
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| Format: | Article |
| Language: | English |
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Dental Press Editora
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| Series: | Dental Press Journal of Orthodontics |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000200045&lng=en&tlng=en |
| _version_ | 1828290902344335360 |
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| author | Samaneh Nakhaei Raha Habib Agahi Amin Aminian Masoud Rezaeizadeh |
| author_facet | Samaneh Nakhaei Raha Habib Agahi Amin Aminian Masoud Rezaeizadeh |
| author_sort | Samaneh Nakhaei |
| collection | DOAJ |
| description | ABSTRACT OBJECTIVE: The aim of the present study was to evaluate color changes and force degradation of orthodontic elastomeric ligatures in different stretching patterns during a 8-weeks period. METHODS: Two elastomers with the minimum and two with the maximum color changing, and gray elastomers of two brands (American Orthodontics and Ortho Technology) were selected according to an opinion poll with clinicians and color changes after 4 weeks of intraoral use were evaluated. These elastomers were mounted on special jigs fabricated using a CAD-CAM technique, underwent different stretching patterns and the force was measured in 0, 24 hours, 2, 4 and 8 weeks. During in vivo part of the study, force levels of elastomers were measured after 4 weeks on a material testing machine. Data were analyzed with four-way ANOVA and Tukey post hoc tests. RESULTS: All the elastomers showed color changing but the degree of color stability was significantly different. The mean force degradation was higher in 1-mm stretch groups. After 8 weeks, the average residual force of elastomers was 1.45 ± 0.18 N and the maximum force decay was seen in the elastomers that exhibited the maximum initial force. CONCLUSION: There is significant relationship between the stretching pattern and the amount of residual force of elastomers. Elastomers with higher initial forces exhibited higher percentages of force loss after 8 weeks. It seems that there is a relationship between initial color and color changing of elastomers. |
| first_indexed | 2024-04-13T10:43:24Z |
| format | Article |
| id | doaj.art-355b7559256041c1ade2480d8da31b36 |
| institution | Directory Open Access Journal |
| issn | 2177-6709 |
| language | English |
| last_indexed | 2024-04-13T10:43:24Z |
| publisher | Dental Press Editora |
| record_format | Article |
| series | Dental Press Journal of Orthodontics |
| spelling | doaj.art-355b7559256041c1ade2480d8da31b362022-12-22T02:49:52ZengDental Press EditoraDental Press Journal of Orthodontics2177-6709222455410.1590/2177-6709.22.2.045-054.oarS2176-94512017000200045Discoloration and force degradation of orthodontic elastomeric ligaturesSamaneh NakhaeiRaha Habib AgahiAmin AminianMasoud RezaeizadehABSTRACT OBJECTIVE: The aim of the present study was to evaluate color changes and force degradation of orthodontic elastomeric ligatures in different stretching patterns during a 8-weeks period. METHODS: Two elastomers with the minimum and two with the maximum color changing, and gray elastomers of two brands (American Orthodontics and Ortho Technology) were selected according to an opinion poll with clinicians and color changes after 4 weeks of intraoral use were evaluated. These elastomers were mounted on special jigs fabricated using a CAD-CAM technique, underwent different stretching patterns and the force was measured in 0, 24 hours, 2, 4 and 8 weeks. During in vivo part of the study, force levels of elastomers were measured after 4 weeks on a material testing machine. Data were analyzed with four-way ANOVA and Tukey post hoc tests. RESULTS: All the elastomers showed color changing but the degree of color stability was significantly different. The mean force degradation was higher in 1-mm stretch groups. After 8 weeks, the average residual force of elastomers was 1.45 ± 0.18 N and the maximum force decay was seen in the elastomers that exhibited the maximum initial force. CONCLUSION: There is significant relationship between the stretching pattern and the amount of residual force of elastomers. Elastomers with higher initial forces exhibited higher percentages of force loss after 8 weeks. It seems that there is a relationship between initial color and color changing of elastomers.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000200045&lng=en&tlng=enColorElastomersOrthodonticsForce degradation. |
| spellingShingle | Samaneh Nakhaei Raha Habib Agahi Amin Aminian Masoud Rezaeizadeh Discoloration and force degradation of orthodontic elastomeric ligatures Dental Press Journal of Orthodontics Color Elastomers Orthodontics Force degradation. |
| title | Discoloration and force degradation of orthodontic elastomeric ligatures |
| title_full | Discoloration and force degradation of orthodontic elastomeric ligatures |
| title_fullStr | Discoloration and force degradation of orthodontic elastomeric ligatures |
| title_full_unstemmed | Discoloration and force degradation of orthodontic elastomeric ligatures |
| title_short | Discoloration and force degradation of orthodontic elastomeric ligatures |
| title_sort | discoloration and force degradation of orthodontic elastomeric ligatures |
| topic | Color Elastomers Orthodontics Force degradation. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000200045&lng=en&tlng=en |
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