Several materials and lights are actually available for use in daily practices. Their interactions with oral tissues can induce, produce, or provoke biological effects that could be appreciated or unwished. The knowledge of their process of interaction is necessary to improve the quality of treatments or products and to avoid side effects.

Importantly, several lights are proposed for oral treatments in different fields. The understanding of their effects on biological material can improve or prohibit their applications (e.g., bioactivation, biomodulation, magnetic properties, mechanical properties, chemical properties, tissue overheating, etc.). Thus, studies focused on light applications and matters used in oral treatments and fundamental studies can enlighten the interaction process with biological oral tissues and through this can improve the quality of oral treatments. In the oral environment, there are both hard (bone and teeth) and soft (gingival and mucosal tissues), providing complex functions and aesthetics. Treatment modalities including light energy should specifically target these tissues for the best biological responses and clinical outcomes. Thus, research and clinical studies focused on these light applications on the various oral tissues would enlighten the biological and interactive mechanisms that can eventually improve the quality of treatment for oral conditions and needs. Potential topics include, but not limited to:

• Oral light applications
• Light interaction with biological oral tissues
• Clinical applications using a new material
• Interaction between material and oral tissues
• Basic research including molecular biology
• Properties of light-emitting sources including lasers for oral tissues
• Biointeractive mechanisms– wavelengths, parameters, indications
• Clinical studies of such applications
• New materials and advantages
• Limitations and risks

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