Extension of the working time of dental composites due to a new type of white operating lamp
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Albrecht von Bülow
,
Ralf Gente
Abstract
Objectives
Dental composite materials for filling teeth are usually hardened by polymerisation lamps emitting blue light. However, the same wavelength is also emitted by light of dental operating lamps for lighting the oral cavity. Thus, the hardening of the composite is already initiated earlier, shortening the time of formability. The objective of this study is to develop a specific white LED for dental operating lamps. When restoring teeth, it enables dentists to work longer on light-curing composites in the same brightness.
Methods
Based on a short-wave blue coloured LED and a fluorescent substance, a white luminescent LED with a colour temperature of approx. 3,000 K is produced as a prototype. The formable working times of three composites are measured for this LED and two dental head lamps at an illuminance of 10,000 lx.
Results
Shorter working times of 98–237 s were measured for the headlamps and 409–807 s for the new LED. This light of the new LED is perceived by the human eye as warm white.
Conclusions
The new LED extends the working time by the factor of 3.0 to 5.8 compared to the head lamps. This enables more precise modelling of fillings.
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Research funding: None declared.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: Authors state no conflict of interest.
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Informed consent: Informed consent was obtained from all individuals included in this study.
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Ethical approval: The local Institutional Review Board deemed the study exempt from review.
References
1. Kwon, TY, Bagheri, R, Kim, YK, Kim, KH, Burrow, MF. Cure mechanisms in materials for use in esthetic dentistry. J Investig Clin Dent 2012;3:3–16. https://doi.org/10.1111/j.2041-1626.2012.00114.x.Search in Google Scholar PubMed
2. Althaus, A, Gente, M. Eine Methode zur Verlängerung der Verarbeitungszeit von Komposit. ZWR - Das Dtsch Zahnärzteblatt 2007;116:394–6. https://doi.org/10.1055/s-2007-991501.Search in Google Scholar
3. Dionysopoulos, P, Watts, DC. Sensitivity to ambient light of visible light-cured composites. J Oral Rehabil 1990;17:9–13. https://doi.org/10.1111/j.1365-2842.1990.tb01388.x.Search in Google Scholar PubMed
4. Hagge, MS, Di Lorenzo, SC, Lindemuth, JS, Latta, MA, Smith, JW. Use of yellow plastic food wrap to retard composite resin polymerization. J Esthetic Restor Dent 2003;15:370–6. https://doi.org/10.1111/j.1708-8240.2003.tb00310.x.Search in Google Scholar PubMed
5. Ikemura, K, Ichizawa, K, Jogetsu, Y, Endo, T. Synthesis of a novel camphorquinone derivative having acylphosphine oxide group, characterization by UV-VIS spectroscopy and evaluation of photopolymerization performance. Dent Mater J 2010;29:122–31. https://doi.org/10.4012/dmj.2009-026.Search in Google Scholar PubMed
6. Lane, DA, Watts, DC, Wilson, NHF. Ambient light working times of visible light-cured restorative materials. Does the ISO standard reflect clinical reality? Dent Mater 1998;14:353–7. https://doi.org/10.1016/s0109-5641(99)00005-6.Search in Google Scholar PubMed
7. Pagniano, RP, Longenecker, S, Chandler, H. Effect of unit and operatory lights on the consistency of light-activated composites. J Prosthet Dent 1989;61:150–2. https://doi.org/10.1016/0022-3913(89)90363-6.Search in Google Scholar PubMed
8. Santini, A, Torres Gallegos, I, Felix, CM. Photoinitiators in dentistry: a review. Prim Dent J 2013;2:30–3. https://doi.org/10.1308/205016814809859563.Search in Google Scholar PubMed
9. Richter, M. Einführung in die Farbmetrik, 1st ed. Berlin: De Gruyter; 1976.10.1515/9783110838770Search in Google Scholar
10. Ogunyinka, A, Palin, WM, Shortall, AC, Marquis, PM. Photoinitiation chemistry affects light transmission and degree of conversion of curing experimental dental resin composites. Dent Mater 2007;23:807–13. https://doi.org/10.1016/j.dental.2006.06.016.Search in Google Scholar PubMed
11. Sommer, A, Gente, M. Light-induced control of polymerisation shrinkage of dental composites by generating temporary hardness gradients. Biomed Tech 1999;44:290–4. https://doi.org/10.1515/bmte.1999.44.10.290.Search in Google Scholar PubMed
12. Jacobsen, PH. Extending the working time of light-activated composite restorative materials. Br Dent J 1986;160:162–5. https://doi.org/10.1038/sj.bdj.4805797.Search in Google Scholar PubMed
13. West, KE, Jablonski, MR, Warfield, B, Cecil, KS, James, M, Ayers, MA, et al.. Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans. J Appl Physiol 2011;110:619–26. https://doi.org/10.1152/japplphysiol.01413.2009.Search in Google Scholar PubMed
14. International Standardization Organization. Dentistry - polymer-based restorative materials (ISO 4049:2019). Berlin: Beuth Verlag GmbH; 2019.Search in Google Scholar
15. Da Silva, T, De Oliveira, H, Severino, D, Balducci, I, Huhtala, M, Gonçalves, S. Direct spectrometry: a new alternative for measuring the fluorescence of composite resins and dental tissues. Operat Dent 2014;39:407–15. https://doi.org/10.2341/12-464-l.Search in Google Scholar
16. Meller, C, Klein, C. Fluorescence properties of commercial composite resin restorative materials in dentistry. Dent Mater J 2012;31:916–23. https://doi.org/10.4012/dmj.2012-079.Search in Google Scholar PubMed
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Articles in the same Issue
- Frontmatter
- Review
- Biomechanical testing of osteosynthetic locking plates for proximal humeral shaft fractures – a systematic literature review
- Research Articles
- Instrumented treadmill for run biomechanics analysis: a comparative study
- Computational modelling of the graft-tunnel interaction in single-bundle ACL reconstructed knee
- Biomechanical effects of inclined implant shoulder design in all-on-four treatment concept: a three-dimensional finite element analysis
- Extension of the working time of dental composites due to a new type of white operating lamp
- Modeling the compliance of the human eye with elastic membranes based on a bionic approach
- Region-wise severity analysis of diabetic plantar foot thermograms
- A new method for vital sign detection using FMCW radar based on random body motion cancellation
- Atherosclerosis plaque tissue classification using self-attention-based conditional variational auto-encoder generative adversarial network using OCT plaque image
- A combined impedance compensation strategy applied to external automatic defibrillators
