Dental assistance apparatus, comprising a dental assistance unit (4) and an armchair (5) for patients, arranged in immediate mutual proximity, and to which a treatment arm (7) for instrument (9) is connected structurally dental assistance, and optionally an arm for some other accessory or device used in a dental assistance environment, such as a screen (3), wherein the dental assistance apparatus (2) comprises at least one arm part (11) arranged in the immediate vicinity of the dental assistance unit (4), said imaging means (11) being provided on said arm part (11) comprising a source (14) of X-ray radiation and an information receiver (15) of images, designed for the formation of extraoral dental images, being arranged, in said apparatus (2), the mutual position of said arm part (11) and said armchair (5) for patients such that the part (11) of bra zo is positioned or positionable above said chair (5) for patients, and, in said apparatus, said part (11) carrying arm of the imaging means (14, 15), and / or the chair ( 5) for patients, it is arranged so that it is rotatable by means of an actuator, wherein said source (14) of X-ray radiation and said image information receiver (15), as well as said arm part (11) carrier thereof, are arranged to be positioned such that said arm part (11) is positioned above the head of a patient in a sitting position in the patient chair (5), and said source (14) of X-ray radiation and said image information receiver (15) on opposite sides of the head, wherein a vertical support column or a corresponding support structure (1,16) for supporting said arm part (11) arranged to carry the imaging media, it is arranged with re to the apparatus, and by which said arm part (11) is fixed to this support structure (1, 16) by means of at least one other arm part (12) extending substantially horizontally, and, where , patient support means (10) arranged to be positioned or positioned above the patient chair (5), between the source (14) of X-ray r
