Oral epithelial cell reaction after exposure to Invisalign plastic material

Premaraj, Thyagaseely Sheela; Simet, Samantha M.; Beatty, Mark W.; Premaraj, Sundaralingam

doi:10.1016/j.ajodo.2013.09.011

Cited by 40 publications

(34 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to previous studies and the material safety data sheets provided by the manufacturers, the Invisalign aligner is made of SmartTrack material, which is primarily composed of thermoplastic PU with some modification (the details are not disclosed by the manufacturer). 11, 27, 28, 29 The Smartee aligner is manufactured with Erkodur foil (Erkodent Erich Kopp GmbH, Pfalzgrafenweiler, Germany), which is composed of PETG. 30 …”

Section: Methodsmentioning

confidence: 99%

Colour stabilities of three types of orthodontic clear aligners exposed to staining agents

et al. 2016

View full text Add to dashboard Cite

The aim of this study was to evaluate and compare the colour stabilities of three types of orthodontic clear aligners exposed to staining agents in vitro. Sixty clear orthodontic aligners produced by three manufacturers (Invisalign, Angelalign, and Smartee) were immersed in three staining solutions (coffee, black tea, and red wine) and one control solution (distilled water). After 12-h and 7-day immersions, the aligners were washed in an ultrasonic cleaner and measured with a colourimeter. The colour changes (ΔE*) were calculated on the basis of the Commission Internationale de I'Eclairage L*a*b* colour system (CIE L*a*b*), and the results were then converted into National Bureau of Standards (NBS) units. Fourier transformation infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) were conducted to observe the molecular and morphologic alterations to the aligner surfaces, respectively. The three types of aligners exhibited slight colour changes after 12 h of staining, with the exception of the Invisalign aligners stained with coffee. The Invisalign aligners exhibited significantly higher ΔE* values (ranging from 0.30 to 27.81) than those of the Angelalign and Smartee aligners (ΔE* values ranging from 0.33 to 1.89 and 0.32 to 1.61, respectively, P<0.05). FT-IR analysis confirmed that the polymer-based structure of aligners did not exhibit significant chemical differences before and after the immersions. The SEM results revealed different surface alterations to the three types of aligner materials after the 7-day staining. The three types of aesthetic orthodontic appliances exhibited colour stability after the 12-h immersion, with the exception of the Invisalign aligners stained by coffee. The Invisalign aligners were more prone than the Angelalign and Smartee aligners to pigmentation. Aligner materials may be improved by considering aesthetic colour stability properties.

show abstract

Section: Methodsmentioning

confidence: 99%

Colour stabilities of three types of orthodontic clear aligners exposed to staining agents

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Since the aligner is removable, patients' daily oral hygiene routines are not impeded. The safety of Invisalign aligners to gingival epithelial cells has also been validated in vitro (Eliades, Pratsinis, Athanasiou, Eliades, & Kletsas, 2009;Premaraj, Simet, Beatty, & Premaraj, 2014).…”

mentioning

confidence: 99%

The dynamics of the oral microbiome and oral health among patients receiving clear aligner orthodontic treatment

et al. 2020

View full text Add to dashboard Cite

Objectives This 6‐month prospective clinical study assessed the impacts of Invisalign appliances on the oral bacterial community and oral health of patients. Methods Salivary samples were obtained from twenty‐five adult patients receiving Invisalign aligner treatment before the treatment (Group B) and at a 6‐month follow‐up (Group P). The bacterial composition of each sample was determined using Illumina MiSeq sequencing of the bacterial 16S rRNA. Intra‐ and intergroup biodiversity was analyzed. Clinical periodontal parameters and daily oral hygiene habits were recorded. Results Reduction in plaque, increased daily brushing frequency, and decreased dessert intake were observed in Group P compared with that in Group B. A total of 1,853,952 valid reads were obtained from the 50 salivary samples, with 37,904 sequences per sample. No significant differences were detected in the intra‐ and intergroup biodiversity comparisons between the two groups. By clustering, 8,885 OTUs were identified and categorized into six major phyla: Firmicutes, Proteobacteria, Bacteroidetes, Fusobacteria, Actinobacteria, and Candidate_division_TM7_norank. At the genus level, compared with Group B, Group P demonstrated significantly increased Bacillus abundance and decreased Prevotella abundance. Conclusions Our results suggested that the general biodiversity and salivary microbial community structure did not change significantly and that patients had increased beneficial oral hygiene habits and awareness during the first six months of Invisalign treatment. Hence, on the basis of this study, it appears that Invisalign aligner treatment did not induce deterioration of oral health nor significant biodiversity changes in oral bacterial communities, assuming that detailed oral hygiene instructions for both teeth and aligners were provided.

show abstract

“…Invisalign technology has been established nearly a decade, however, the studies of the transparent tooth correction technology have predominantly focused on case reports, [18][19][20] oral hygiene [21][22][23] and technical or material-specific aspects. 24 There are just a few investigations about the force system of transparent tooth correction treatment.…”

Section: Discussionmentioning

confidence: 99%

Influence of Friction in Transparent Tooth Correction Treatment: Finite Element Method

Cai

Yang

2015

J. Mech. Med. Biol.

View full text Add to dashboard Cite

Objective: The objective was to evaluate the effect of frictional forces on the canine's translation and rotation in transparent tooth correction treatment. Materials and Methods: Based on computed tomography (CT) images of the teeth and their supporting tissues, solid models were used to build finite-element models. One canine was simulated translation and rotation in the buccolingual direction by aligners with different friction coefficients. Results: The change of the canine's rotation centers and periodontal ligament (PDL) stress with an increase of the friction coefficient in the two movement types were obtained. Conclusions: Friction coefficient has little effect on the canine's translation movement. While in rotation cases, the small friction coefficient seems to be helpful to gain the body movement type.

show abstract

Oral epithelial cell reaction after exposure to Invisalign plastic material

Cited by 40 publications

References 21 publications

Colour stabilities of three types of orthodontic clear aligners exposed to staining agents

Colour stabilities of three types of orthodontic clear aligners exposed to staining agents

The dynamics of the oral microbiome and oral health among patients receiving clear aligner orthodontic treatment

Influence of Friction in Transparent Tooth Correction Treatment: Finite Element Method

Contact Info

Product

Resources

About