Patent ID: 7300280

Claim:
A dental device for recording the position of the jaws of a patient in relation to one another, the device comprising a pair of recording plates, said pair of recording plates comprising an upper recording plate and a lower recording plate, at least one of said recording plates being in one piece and having a substantially planar extent with almost constant thickness, the upper recording plate being able to be secured on the upper jaw of the patient, and the lower recording plate being able to be secured on the lower jaw of the patient, each of the recording plates being mirror-symmetric about a sagittal plane relative to the position of the pair of recording plates when fitted in situ in the patient, and one recording plate being provided with a plane writing surface and the other recording plate being provided with a stylus which is designed to cooperate with the writing surface, wherein said recording plates have a planar base area, a pair of support surfaces on both sides of the planar base area and of the sagittal plane, with piercing retention openings arranged on said support surfaces, and a pair of substantially planar transition areas arranged adjacent to the base area and to a respective support surface, the base area having almost the shape of an isosceles trapezoid which tapers in a delta formation toward the front and is mirror-symmetric about the sagittal plane, whereas each transition area is elongate and approximately parallelogram-shaped and bears with one of its longer sides on one of the nonparallel sides of the almost trapezoid base area and with the other of its longer sides on one of the support surfaces, and each transition area being angled away both from the adjacent base area and also from the adjacent support surface in such a way that the support surfaces are offset from the plane of the base area, specifically, downwardly offset in the upper recording plate and upwardly offset in the lower recording plate relative to the position of said pair of recording plates when fitted in situ in the patient.