Even today, approximal lesions pose a particular problem to the treating dentist. A primary reason for this is the difficulty accessing the localized area of the carious cavity. Treating this area usually requires invasive treatment, in which healthy tooth structure must be removed. Furthermore, it is possible that the filling material may deteriorate as a result of the aging process, meaning that the restoration will require replacement at some point in the future. In order to prevent this, the development of a treatment oriented towards prevention and minimal invasion is key.