There are other methods for diagnosing caries based on different forms of laser light that can detect caries. Previously, these techniques have only been used for occlusal surfaces and buccal/lingual/palate tooth surfaces, not for diagnostics between teeth. For some time now, the translucency of the teeth is used in a technique. The light is within the so-called NIR area - near infrared light (non-wavelength wavelength). On the market, a product (DAIGNOcam) uses this technology. The light is led in a hand piece (like a little bigger pen) held against the tooth, one tooth at a time. The tooth is illuminated and a digital video camera on the hand piece projects a computer monitor image. In the picture, the caries lesions are seen like dark spots. These correspond to a qualitative defect in the enamel or dentin, i.e. an area where various minerals were lost / dissolved due to caries (demineralized area). The image can be saved in the patient's dental record in the same way as regular photos or X-rays. DIAGNOcam provides a qualitative response - one looks primarily if it is caries or not. It will then be a supplement to the usual survey with mirror and probe. The technique is mainly used in adult patients and permanent teeth. DIAGNOcam is currently available in clinical practice since a number of years. However, there is no complete evaluation of how well the technology diagnoses caries in primary teeth. This is unfortunate for mainly two reasons: from a radiation hygiene point of view, it is especially important to reduce the amount of X-rays to young individuals; Intra-oral X-rays are often experienced as difficult to manage by younger children, which leads to poorer diagnostics. It is important to identify early caries lesions in primary teeth as these teeth have a thinner enamel and a less mineralized dentin, which causes a caries lesion to progress much faster. This may lead to difficulties in restoring the teeth as well as pain from pulpal involvement. If the carious lesion is extensive, this may lead to tooth extraction.