Skip to main content

13.03.2023 | Original Article

Color changes of nanocomposites used for clear aligner attachments: an in vitro study

verfasst von: Serhat Özsoy, DDS-PhD, Hande Pamukçu, Assistant Professor, Professor Ömür Polat-Özsoy, Ece Mersan Ateş, PhD candidate

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Einloggen, um Zugang zu erhalten

Abstract

Purpose

The purpose of this study was to compare the color changes of two different nanocomposites used for two different designs of clear aligner attachments.

Methods

In all, 120 human premolars were embedded in 12 upper dental models with 10 premolars in each model. Models were scanned and attachments were digitally designed. Conventional attachments (CA) were prepared for the first six models and optimized multiplane attachments (OA) were prepared for the other six models with packable composite (PC) on the right quadrant and flowable composite (FC) on the left quadrant of each model. The models were subjected to 2000 thermal cycles at 5 °C/55 °C and then consecutively immersed in the five different staining solutions each for 48 h to simulate external discoloration. Color measurements were taken with a spectrophotometer. Color changes (∆E*ab) of the attachments before and after immersion were compared with the Commission Internationale de l’Éclairage L*a*b* (CIELAB) color space approach.

Results

When ∆E*ab values were examined, no significant difference was observed between the groups according to the attachment type (P > 0.05). After the coloration process, the flowable composite group showed less coloration than the packable composite group for both attachment designs (P < 0.05). Color difference values after the staining procedure were significantly higher in the CA-PC and OA-PC groups compared to the CA-FC and OA-FC groups (P < 0.05).

Conclusion

Color change of the packable nanocomposite was more pronounced than that of the flowable nanocomposite for both attachment designs. Therefore, clear aligner attachments created using flowable nanocomposite can be recommended, especially in the anterior region where esthetics are important for the patient.
Literatur
7.
Zurück zum Zitat Rossini G, Parrini S, Deregibus A, Castroflorio T (2017) Controlling orthodontic tooth movement with clear aligners: an updated systematic review regarding efficacy and efficiency. J Aligner Orthod 1:7–20 Rossini G, Parrini S, Deregibus A, Castroflorio T (2017) Controlling orthodontic tooth movement with clear aligners: an updated systematic review regarding efficacy and efficiency. J Aligner Orthod 1:7–20
11.
Zurück zum Zitat Comba B, Parrini S, Rossini G, Castroflorio T, Deregibus A (2017) A three dimensional finite element analysis of upper-canine distalization with clear aligners, composite attachments, and class II elastics. J Clin Orthod 51:24–28 PubMed Comba B, Parrini S, Rossini G, Castroflorio T, Deregibus A (2017) A three dimensional finite element analysis of upper-canine distalization with clear aligners, composite attachments, and class II elastics. J Clin Orthod 51:24–28 PubMed
30.
Zurück zum Zitat Bureau Central de la Commision Internationale de l’Eclairage (CIE) (1978) Recommendations on uniform color-spaces, color difference equations, psychometric color terms. CIE, Paris, pp 9–12 (Supplement No. 2 to CIE Publication No. 15) Bureau Central de la Commision Internationale de l’Eclairage (CIE) (1978) Recommendations on uniform color-spaces, color difference equations, psychometric color terms. CIE, Paris, pp 9–12 (Supplement No. 2 to CIE Publication No. 15)
31.
Zurück zum Zitat International Standardization Organization (1985) DIN EN 27491. Dentistry: dental materials: determination of color stability of dental polymeric materials. Beuth, Belgium International Standardization Organization (1985) DIN EN 27491. Dentistry: dental materials: determination of color stability of dental polymeric materials. Beuth, Belgium
37.
Zurück zum Zitat Nanda R, Garino F, Ojima K, Castroflorio T, Parrini S (2021) The hybrid approach in class II malocclusions treatment, 1st edn. Principles and biomechanics of aligner treatment. Amsterdam, The Netherlands, pp 149–160 Nanda R, Garino F, Ojima K, Castroflorio T, Parrini S (2021) The hybrid approach in class II malocclusions treatment, 1st edn. Principles and biomechanics of aligner treatment. Amsterdam, The Netherlands, pp 149–160
39.
Zurück zum Zitat Bueno RP, Salomone P, Villetti MA, Pozzobon RT (2013) Effect of bleaching agents on the fluorescence of composite resins. Eur J Esthet Dent 8(4):582–591 PubMed Bueno RP, Salomone P, Villetti MA, Pozzobon RT (2013) Effect of bleaching agents on the fluorescence of composite resins. Eur J Esthet Dent 8(4):582–591 PubMed
40.
Zurück zum Zitat Tsiliagkou A, Diamantopoulou S, Papazoglou E, Kakaboura A (2016) Evaluation of reliability and validity of three dental color-matching devices. Int J Esthet Dent 11(1):110–124 PubMed Tsiliagkou A, Diamantopoulou S, Papazoglou E, Kakaboura A (2016) Evaluation of reliability and validity of three dental color-matching devices. Int J Esthet Dent 11(1):110–124 PubMed
48.
Zurück zum Zitat Ertaş E, Güler AU, Yücel AÇ, Köprülü H, Güler E (2006) Color stability of resin composites after immersion in different drinks. Dent Mater J 25(2):371–376 CrossRefPubMed Ertaş E, Güler AU, Yücel AÇ, Köprülü H, Güler E (2006) Color stability of resin composites after immersion in different drinks. Dent Mater J 25(2):371–376 CrossRefPubMed
49.
Zurück zum Zitat Inokoshi S, Burrow MF, Kataumi M et al (1996) Opacity and color changes of tooth-colored restorative materials. Oper Dent 21(2):73–80 PubMed Inokoshi S, Burrow MF, Kataumi M et al (1996) Opacity and color changes of tooth-colored restorative materials. Oper Dent 21(2):73–80 PubMed
50.
Zurück zum Zitat Turssi CP, de Magalhães CS, Serra MC, Rodrigues Júnior AL (2001) Surface roughness assessment of resin-based materials during brushing preceded by pH-cycling simulations. Oper Dent 26(6):576–584 PubMed Turssi CP, de Magalhães CS, Serra MC, Rodrigues Júnior AL (2001) Surface roughness assessment of resin-based materials during brushing preceded by pH-cycling simulations. Oper Dent 26(6):576–584 PubMed
57.
Zurück zum Zitat Duc O, Di Bella E, Krejci I, Betrisey E, Abdelaziz M, Ardu S (2019) Susceptibility of resin composite materials. Am J Dent 32(1):39–42 PubMed Duc O, Di Bella E, Krejci I, Betrisey E, Abdelaziz M, Ardu S (2019) Susceptibility of resin composite materials. Am J Dent 32(1):39–42 PubMed
Metadaten
Titel
Color changes of nanocomposites used for clear aligner attachments: an in vitro study
verfasst von
Serhat Özsoy, DDS-PhD
Hande Pamukçu, Assistant Professor
Professor Ömür Polat-Özsoy
Ece Mersan Ateş, PhD candidate
Publikationsdatum
13.03.2023
Verlag
Springer Medizin
Erschienen in
Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI
https://doi.org/10.1007/s00056-023-00461-7

Newsletter

Bestellen Sie unseren kostenlosen Newsletter Update Zahnmedizin und bleiben Sie gut informiert – ganz bequem per eMail.