US 2010/0075274 A1Published application

Method and device for the transfer of a jaw model in relation to a hinge axis

AssigneeDental Innovation GmbH

InventorRolf Klett

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Abstract

The invention relates to a method and a registering system for the transfer of a jaw model in relation to a hinge axis, for example, in an articulator, and to a connection device for connecting a lower jaw adapter (1) to a measuring carrier (4), and a bite carrier (3) for producing a bite key. The invention is characterised in that the transfer of the mandibular joint geometry, especially the exact position of the hinge axis of the patient, can be carried out in a state of assembly or an articulator using only a hinge axis determination relative to the lower jaw of the patient. The transfer of the facial arc required until now in prior art is rendered superfluous by the invention. Moreover, the possibilities of use of the transfer in relation to the hinge axis are extended, modularised and simultaneously simplified and accelerated. Sources of error are eliminated, and the expenditure on equipment and costs of the transfer of the model can be critically reduced.

Claims48

Dependent claims

Method for transfer of a jaw model of a patient in relation to a hinge axis, by means of a lower jaw adapter (1), to an articulator assembly stand (22) having an articulator hinge axis (25), the lower jaw adapter (1) having a bite carrier (3) for recording a bite key, as well as a coupling device (10) connected with the bite carrier (3), which device can be connected, with shape fit, with a coupling accommodation (23) that can be disposed on the assembly stand (22) in an adjustable, reproducible relative position with regard to the assembly stand hinge axis (25), and is complementary in shape with the coupling device (10),

the method comprising the following steps:
a) placing impression mass on a lower-jaw-side tooth contact surface of the lower jaw adapter (1);
b) connecting the lower jaw adapter (1) with the dental arc of the patient's lower jaw, by means of the impression mass, thereby producing an impression of the lower jaw row of teeth in the impression mass;
c) carrying out a jaw joint registration with hinge axis determination, whereby the spatial location of the patient hinge axis (8) relative to the lower jaw adapter (1) is determined;
d) connecting the bite carrier (3) with a lower jaw model of the patient, by means of the lower jaw tooth impression in the impression mass on the bite carrier (3);
e) placing the bite carrier (3) and lower jaw model into the assembly stand (22) by means of connecting the bite carrier coupling device (10) with the assembly stand coupling accommodation (23), and matching the relative spatial position of the assembly stand coupling accommodation (23) relative to the hinge axis (25) of the assembly stand (22) to the spatial relative position between patient hinge axis (8) and coupling device (10) of the lower jaw adapter (1) determined during registration, until agreement between patient hinge axis (8) and assembly stand hinge axis (25) is reached;
f) fixing the lower jaw model in place on the lower jaw assembly plate of the assembly stand (22).

4 more elements

Registration system, encompassing a jaw adapter (1) with a bite carrier (3) as well as an articulator assembly stand (22), for the transfer of a jaw model of a patient in relation to a hinge axis into the assembly stand (22) by means of the jaw adapter (1) and a bite key of the patient arrangeable on the bite carrier (3), whereby the bite carrier (3) of the jaw adapter (1) has a coupling device (10) that can be connected with a coupling accommodation (23) that can be disposed on the assembly stand (22) in a reproducible relative position with regard to the assembly stand hinge axis (25), with shape fit, which accommodation is complementary in shape to the coupling device (10) of the bite carrier,

wherein
the jaw adapter is a lower jaw adapter (1), and the bite carrier is a lower jaw bite carrier (3), whereby the lower jaw adapter (1) can be connected with a measurement carrier (4) for determining the patient hinge axis (8) relative to the coupling device (10) of the bite carrier (3), and the spatial position of the coupling accommodation (23) of the assembly stand (22) relative to the hinge axis (25) of the assembly stand (22) is defined and reproducibly adjustable.

Dependencies are inferred from the claim text.