1. Dental product ( 8 ) for the evaluation, according to scale, of X-ray recordings of areas ( 2 ) which are to be diagnosed, in particular areas of the tooth and/or jawbone, within the oral cavity of a patient, having a main body ( 10 ), the shape of which is such that it is able to be received by the patient and is able to be fixed in the immediate vicinity of the area ( 2 ) which is to be diagnosed by X-raying, consisting of a material which is penetrable by X-ray beams, wherein at least one reference object ( 12 ) consists of material which absorbs X-ray beams, wherein the reference object ( 12 ) is held in the interior of the main body ( 10 ) and the main body ( 10 ) is spherical or has an elongated shape with a substantially circular cross-section, wherein the material of the main body ( 10 ) is flexible or soft, and wherein the main body ( 10 ) is formed by a cellulose or wadding roll.