The effect of static and dynamic testing on orthodontic latex and non-latex elastics

Aljhani, Ali S.; Aldrees, Abdullah M.

doi:10.1016/j.odw.2010.04.003

Cited by 8 publications

(11 citation statements)

References 15 publications

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“…After 24 hours, the percentage difference for non-latex elastics was 39.23% and for latex was 19.92% ( Fig 2 ). The laboratory studies 9 , 12 found similar results, detecting greater loss of strength for the non-latex elastics, when compared to the latex ones. Kersey et al 4 , when comparing latex and non-latex elastics from a single manufacturer (American Orthodontics, the same manufacturer used in this study), found that latex elastics maintain higher strength levels over 24 hours, retaining 83% of initial strength, compared to 69% retained by non-latex elastics.…”

Section: Discussionmentioning

confidence: 56%

“… 5 , 6 , 8 - 13 , 18 - 21 Some have evaluated the differences between the forces released by latex and non-latex elastics. 4 , 6 , 9 , 11 - 13 However, it is known that the oral medium is much more complex, with a great variety of interacting factors such as salivary pH, diet, oral hygiene conditions and oral habits. 3 , 14 In situ study, as conducted in this research, is the more precise method to test materials that will be held in the oral environment.…”

Section: Discussionmentioning

confidence: 99%

“…Some laboratory studies were performed to analyze the behavior of non-latex elastics compared to latex elastics. 4 , 6 , 9 , 11 - 13 Most of these studies showed a marked reduction in the strength levels of these elastics within the first 24 hours, showing the non-latex elastics limitation in maintaining a constant force for an extended period. 4,6,11,12 Manufacturers have added chemical substances to retard these effects and extend the lifetime of these elastomers.…”

Section: Introductionmentioning

confidence: 99%

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Force decay evaluation of latex and non-latex orthodontic intraoral elastics: in vivo study

Notaroberto

Martins

Goldner

et al. 2018

Dental Press J. Orthod.

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Objective: This clinical study was conducted in order to evaluate force decay over time of latex and non-latex orthodontic intraoral elastics. Methods: Patients (n = 15) were evaluated using latex and non-latex elastics in the periods of : 0, 1, 3, 12 and 24 hours. The rubber bands were transferred to the testing machine (EMIC DL-500 MF), and force values were recorded after stretching the elastic to a length of 25mm. Paired t test was applied and analysis of variance (ANOVA) was used to evaluate the variation of force generated. LSD (Fisher’s least significant difference) post-hoc test was thus employed. Results: As regards the initial forces (zero time), the values of force for non-latex elastic were slightly higher than for the latex elastic. In the subsequent times, the forces generated by the latex elastic showed higher values. Regarding the material degradation, at the end of 24 hours the highest percentage was observed for non-latex elastic. Conclusions:The latex elastics had a more stable behavior during the studied period, compared with non-latex.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Force decay evaluation of latex and non-latex orthodontic intraoral elastics: in vivo study

Notaroberto

Martins

Goldner

et al. 2018

Dental Press J. Orthod.

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“…Additional studies [11][12][13][14][15][16] have revealed the mechanical behaviour of non-latex elastics. Kersey et al 13 conducted a study using ¼" elastics produced by American Orthodontics and found force degradation of 46.7% after 24 hours using the cyclic model and 31.2% using the static model for non-latex elastics, and 25.4% in the cyclic model and 17.2% in the static model for latex elastics.…”

Section: Discussionmentioning

confidence: 99%

Degradation and deformation of latex and non-latex orthodontic elastics

Oliveira

Matsumoto

Faria

et al. 2017

Australasian Orthodontic Journal

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Background Intermaxillary elastics are widely used in corrective orthodontic treatment particularly for the interdigitation of buccal segments and the correction of the midline. However, latex has been known to cause allergy, which may restrict elastic use. As alternative materials, non-latex elastics are available. However, clinicians must be aware of their mechanical properties, especially those of deformation and force degradation that affect these materials over time. Objectives The aim of this study was to compare force degradation and deformation of3/16” non-latex and latex elastics supplied by several manufacturers. Materials and methods Special acrylic plates were fabricated to incorporate orthodontic brackets to which elastics were attached and stretched to a distance of approximately 20 mm. The internal diameter and force magnitude of each elastic was measured at time intervals of 0, 24, 72 and 504 hours. The samples were stored in artificial saliva at room temperature during the entire experimental period. Results Latex elastics showed smaller and more uniform deformation than the non-latex elastics. The non-latex elastics showed greater degradation at all time intervals (p < 0.001). The Morelli brand delivered greater force than other brands for both the latex and non-latex elastics at all time intervals (p < 0.05). The G&H latex elastics showed greater force degradation in comparison with the other brands (p < 0.05). The evaluation of the Dentaurum and Orthopli non-latex elastics showed greater degradation (p < 0.05). Conclusions The non-latex elastics showed greater force degradation than the latex elastics. Of the latex elastics, G&H showed greater force degradation, and for the non-latex elastics, those made by Dentaurum and Orthopli degraded most.

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“…Com relação aos meios de degradação, Wong (1976) afirmou que o resultado da degradação depende do local do teste. Inúmeros autores correlacionam a degradação utilizando ambiente seco (Bishara;Bales et al, 1977;Godfrey, 2000;Cha, 2003;Gioka et al, 2006;Fernandes et al, 2011) ou úmido, sendo que para o ambiente úmido encontramos pesquisas utilizando água destilada (Liu et al, 1993;Godfrey, 2000;Cabrera et al, 2003;Kersey et al, 2003;Aljhani;Fernandes et al, 2011;López et al, 2012;Pithon et al, 2013;Rahpeyma;, saliva artificial (Bertl;Droschl, 1986;Cha, 2003;Wang et al, 2007;Santos et al, 2012;Gangurde et al, 2013;Lin et al, 2013;Kamisetty et al, 2014) ou outros tipos de alimentos e bebidas (Leão . Durante a presente pesquisa foi utilizada água destilada, que de acordo com , o tipo de ambiente úmido não influencia no resultado, e ainda, a água apresenta menor viscosidade em relação à saliva artificial, ocasionando a preservação constante da temperatura, e de acordo com alguns autores (Bernardo-Gusmão, 1990;Wong, 1976;Anusavice et al, 2005) a temperatura é um fator de degradação.…”

Section: 72 ------------------------------unclassified

Análise do decaimento de força dos elásticos ortodônticos intermaxilares

Júnior¹,

Evandro²

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de Fantini, pela oportunidade, amizade, respeito e atenção que deram ao meu trabalho e a mim durante todo o tempo que estive presente no departamento. Aos professores e técnicos do Departamento de Biomateriais e Biologia Oral da Faculdade de Odontologia da Universidade de São Paulo, em especial o professor Dr. Leonardo Eloy e ao técnico Antônio Carlos por estarem sempre dispostos a ajudar. Aos grandes amigos, Daniela Linhares, Felipe Gallego, Patrick Saraiva, Lilian Gabarrone, Fábio Yanikian, pelo companherismo durante o curso. Durante esse tempo formamos uma família, a família USP. À família Saraiva, pelo carinho, apoio, ajuda, durante a minha passagem por

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The effect of static and dynamic testing on orthodontic latex and non-latex elastics

Cited by 8 publications

References 15 publications

Force decay evaluation of latex and non-latex orthodontic intraoral elastics: in vivo study

Force decay evaluation of latex and non-latex orthodontic intraoral elastics: in vivo study

Degradation and deformation of latex and non-latex orthodontic elastics

Análise do decaimento de força dos elásticos ortodônticos intermaxilares

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