A holography based method for generating a three-dimensional (3D) volumetric dental arch model, the method comprises: placing a holographic imaging device at least comprising an object and a reference laser beam source and a device capable of recording a holographic image in view to a subject's dental arch; recording at least one holographic image of at least a portion of the subject's dental arch; re-constructing the subject's dental arch holographic image from the recorded image data; and forming a 3D volumetric model of at least a part of the subject's dental arch by using the data of the reconstructed holographic image. In addition, a dental image device may include a light sensor, an ambient light shield. The device may have a mirror device positioned inside the oral cavity with the laser source and image recording means located outside the oral cavity.
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