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ePaper created 2016-10-12, 10:31:46 | version 1.38.0
| research 06 laser 3 2016 A novel blue light diode laser (445 nm) for dental application Biomedical testing and clinical aspects Authors: Prof. Dr Matthias Frentzen, Dr Dominik Kraus, Dr Joana Reichelt, Dr Christoph Engelbach, Dr Claudia Dehn & PD Dr Jörg Meister, Germany The 445 nm laser represents an innovative exten- sion to the already established diode laser systems. Improvedcuttingperformanceatalowerpowerlevel whileretainingtheadvantagesoftheuseofdiodela- sers for the treatment of oral soft tissue means that this is a further development in addition to the infra- red systems with no apparent disadvantages. Introduction In the last ten years, diode lasers—primarily in the near infrared spectrum (NIR, 800–1,000 nm)—have become established in dentistry on evidence-based fundamentalsforsurgicalindications.1 Theyareused primarily for the cutting and removal of oral soft tis- sue but also for the disinfection of gingival pockets2, 3 and root canals.4 From a technical point of view, this technology is not particularly error-prone or expen- sive compared to gas or solid-state lasers and, when usedcorrectly,thesideeffectscanbeeasilyassessed from the clinician’s perspective.5 The further devel- opment of laser diodes has enabled an expanded emissionspectrum.Asaresult,laserapplicationsys- temsthatemitinthebluelightregionaretechnically feasiblenowadays.6 Fromabiomedicalpointofview, these wavelengths provide significant advantages while maintaining an established technology. Blue light is already used clinically in a large number of medical indications.7, 8 As a result of the radiation Fig. 1: Overview of absorption constants for different biological materials at different wavelengths. – Fig. 2: Absorption constants in the range of 500 up to 1,000 nm of soft tissue structures (ac- cording to 25). Fig. 1 Fig. 2 32016