Christian Klein1,2, Matthias Krespach3, Sebastian Spintzyk4, Diana Wolff3, Christiane von Ohle3, Christian Meller3. 1. Department of Conservative Dentistry, Periodontology and Endodontology, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University Hospital Tübingen, Osianderstr. 2-8, 72076, Tübingen, Germany. Christian.Klein@med.uni-tuebingen.de. 2. Private practice Meller Zahngesundheit, Waiblingen, Germany. Christian.Klein@med.uni-tuebingen.de. 3. Department of Conservative Dentistry, Periodontology and Endodontology, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University Hospital Tübingen, Osianderstr. 2-8, 72076, Tübingen, Germany. 4. Section Medical Materials Science & Technology, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University Hospital Tübingen, Tübingen, Germany.
Abstract
OBJECTIVES: This study investigated the fluorescence properties of the most commonly used fluorescent CAD/CAM materials for monolithic dental restorations and their suitability to perform the fluorescence-aided identification technique (FIT). MATERIALS AND METHODS: A total of 175 different color shades (n = 1) from 13 CAD/CAM material brands were analyzed with a monochromator-based microplate reader. Additionally, dentin, enamel, and combined dentin-enamel specimens (respectively, n = 11) were analyzed for comparison purposes. The maximum fluorescence intensity, the corresponding excitation and emission wavelength, and the total fluorescence for the wavelength spectrum λex = 395 nm - 415 nm used for FIT were determined. RESULTS: All assessed CAD/CAM ceramics showed virtually no total fluorescence for the wavelength spectrum λex = 395 nm - 415 nm used for FIT. CERASMARTTM, KZR-CAD HD 2, and LuxaCam Composite displayed total fluorescence values similar to that of the tooth hard substances. All other resin-based CAD/CAM materials showed a significantly higher total fluorescence than the tooth hard substances. CONCLUSIONS: Apart from the mentioned exceptions, all CAD/CAM materials assessed could be suitable for the FIT, either because they are more fluorescent than hard tooth substances or because they do not fluoresce at all at the respective wavelength of λex = 395 nm - 415 nm. CLINICAL RELEVANCE: This study provides insight into the not yet well-known fluorescent properties of dental CAD/CAM materials. This knowledge is not only necessary to reproduce the fluorescence properties of natural teeth but also for the applicability of diagnostic fluorescence inducing techniques.
OBJECTIVES: This study investigated the fluorescence properties of the most commonly used fluorescent CAD/CAM materials for monolithic dental restorations and their suitability to perform the fluorescence-aided identification technique (FIT). MATERIALS AND METHODS: A total of 175 different color shades (n = 1) from 13 CAD/CAM material brands were analyzed with a monochromator-based microplate reader. Additionally, dentin, enamel, and combined dentin-enamel specimens (respectively, n = 11) were analyzed for comparison purposes. The maximum fluorescence intensity, the corresponding excitation and emission wavelength, and the total fluorescence for the wavelength spectrum λex = 395 nm - 415 nm used for FIT were determined. RESULTS: All assessed CAD/CAM ceramics showed virtually no total fluorescence for the wavelength spectrum λex = 395 nm - 415 nm used for FIT. CERASMARTTM, KZR-CAD HD 2, and LuxaCam Composite displayed total fluorescence values similar to that of the tooth hard substances. All other resin-based CAD/CAM materials showed a significantly higher total fluorescence than the tooth hard substances. CONCLUSIONS: Apart from the mentioned exceptions, all CAD/CAM materials assessed could be suitable for the FIT, either because they are more fluorescent than hard tooth substances or because they do not fluoresce at all at the respective wavelength of λex = 395 nm - 415 nm. CLINICAL RELEVANCE: This study provides insight into the not yet well-known fluorescent properties of dental CAD/CAM materials. This knowledge is not only necessary to reproduce the fluorescence properties of natural teeth but also for the applicability of diagnostic fluorescence inducing techniques.
Authors: Yolanda R Gallardo; Lauren Bohner; Pedro Tortamano; Monica N Pigozzo; Dalva C Laganá; Newton Sesma Journal: J Prosthet Dent Date: 2017-09-28 Impact factor: 3.426