DE10260059B4 - glabella - Google Patents

Abstract

Glabella support for Use with a dental Face bow with a rod (12) attached at its first end (12a) a nose adapter (10) carries and a connecting web (20) for connecting the rod (12) with a facebow (30), the rod (12) being axially displaceable arranged along one direction on the connecting web (20), wherein the rod (12) in a sleeve (22) led which in turn is axially displaceable in the connecting web (20) guided and is lockable on this, and wherein between sleeve (22) and rod (12) a force transducer in the form of an elastic element arranged and a display or marker for setting a desired Force is present.

Description

The The invention relates to a glabellar support and a device for transmission a jaw model into a chewing simulator.

Such Nose bars also called Glabellastützen are known in the art. They are used together with so-called facial arches in dentistry and orthodontics used. One consisting of a facebow and a glabella support Device is used for model transmission of the upper jaw model into a chewing simulator (articulator). This Process as such is known and need not be explained here.

Of the facial bow used for this purpose has two connected to a cross member Side members up, who wear so-called ear-olives at their ends, which fixation of the facebow on the head of the patient. For this purpose, the Ear tips in the external auditory canals of the Patients introduced. From the middle of the cross member extends the glabella support toward the nasal root of the patient. The Glabellastütze points a connecting web, which is connected to the cross member. At this Connecting bridge is longitudinally displaceable arranged a rod, one end of a nose adapter for Apply to the root of the patient's nose. The connecting bridge points Continue with a locking screw so that the distance between the Ohroliven and the Nasenadapter and thus the contact pressure in conscience. Limits can be set.

Such face sheets are for example from the DE 44 41 991 C2 or the US 61 09 917 A known.

The EP 0 225 302 A2 shows a face bow for measuring the arbitrary joint axis of the lower jaw, in which the nose adapter is supported by a sleeve which extends over a rod-shaped connecting portion, whereby a telescopic results. The sleeve can be locked by means of a locking screw on the rod-shaped connecting portion, so that there is a rigid connection between nose adapter and ear cups in the use state. To facilitate the arrangement of the nose adapter on the bridge of the nose of the patient to the attending physician, a compression spring is arranged between the sleeve and rod-shaped connecting portion.

So far Creating and adjusting the face bow and the glabella support at the sitting or lying patient by the doctor or treat Orthopedists without further adjustment aids. In this way can only be very difficult consistent and reproducible results achieved be, and the quality of the result depends essentially from the skill and experience of the user. In the worst case If the nose adapter is too weak to press on the bridge of the nose (Glabella) come to a tilting of the face bow in a tilting movement.

Of these, It is an object of the invention, a generic Glabellastütze to that effect to improve that with the help of their use more accurate and in particular also more reproducible results can be achieved, and a device for transmission create a jaw model in a chewing simulator.

These Task is with a Glabellastütze with the features of the claim 1 and a device for transmission of a jaw model in a chewing simulator with the features of the claim 5 solved.

Further Embodiments of the invention are mentioned in the dependent claims.

According to the invention Rod, which carries the nose adapter, not directly in the Held connecting web, but guided longitudinally displaceable in a sleeve, which again longitudinally displaceable is arranged in the same direction on the connecting web. The sleeve is in this case lockable on the connecting web. Between the pole and the sleeve is arranged an elastically deformable force transducer whose Force on the relative position of the rod relative to the sleeve depends. There is also an ad or a mark by means of which the force of the elastic force transducer can be set to a predetermined value. Preferably for many use cases is the constant of the load cell and the location of the mark chosen so that the ideal position is displayed to the operator when the absorbed by the load cell force of the total weight of the used device corresponds (claim 5).

The Invention will now be described with reference to an embodiment with reference to the figures explained in more detail. It shows:

1 a perspective view of a Glabellastütze invention and the

2a to c the correct application of the in 1 illustrated Glabellastütze in conjunction with a face bow.

The Glabellastütze invention, like previous Glabellastützen also, a connecting web 20 on, by means of the recess 28 and the screw 29 can be connected to a crossbeam of a facebow.

Through the connecting bridge 20 the rod extends through it 12 who are at their first end 12a the nose adapter 10 wearing. The pole 12 However, it is not directly connected to the connecting bridge 20 connected but in the sleeve 22 which, in turn, displaceable along the direction A and by means of the locking screw 27 lockable on the connecting bridge 20 is held. Between the end cap 25 the sleeve 22 and the second end 12b the pole 12 extends the compression spring 26 , To secure the rod 12 in the sleeve 22 points the pole 12 a longitudinal slot 14 on, through which one with the sleeve 22 connected bolt 24 extends. This arrangement also limits the maximum displacement of the rod 12 inside the sleeve 22 along the direction A, causing an overstretching of the spring 26 reliably prevented.

The pole 12 has in its front section the marker line 15 on. The position of the marker stroke 15 and the spring constant of the compression spring 26 are chosen so that the marker line 15 right then in the sleeve 22 disappears when the desired contact pressure is reached. In many applications, this pressure corresponds exactly to the weight of the entire face bow used, including the Glabellastütze itself.

With reference to the 2a to c now the intended use of Glabellastütze will be explained.

The facebow 30 is placed on the patient lying down. First, the earolives 32 , which are at the ends of the side members 34 located in the external auditory canals of the patient. The Glabellastütze is with the cross member 36 of the facebow 30 rigidly connected and extends towards the nasal root of the patient. Now the nose adapter 10 put on the nose and the sleeve 22 so long inside the connecting bridge 20 moved until the marker line 15 just with the edge of the sleeve 22 matches. In this case, the predetermined pressing force is achieved, for example, the total weight of the face bow 30 including the glabellar support. The weight force F _G then corresponds to the spring force F _{F of} the compression spring 26 , When this condition is reached, the sleeve becomes 22 by means of the locking screw 27 at the connecting bridge 20 arrested (see 2 B ) and the set exact contact force remains permanently.

In the last step, as in previous devices also, the face bow 30 by means of a connection element 38 with the bite fork 39 connected, see 2c ,

As can be seen, can be achieved by using the Glabellastütze invention in a very simple manner that the nose adapter is pressed exactly with a predetermined force on the nose root. In particular, it can be achieved very easily that the contact force exactly corresponds to the weight force of the entire face bow and the glabellar support, so that the ear studs are substantially free of forces and no tensile or compressive forces in the longitudinal members 34 occur.

10

nasal adapter

12

pole

12a

first The End

12b

second The End

14

longitudinal slot

15

marking line

20

connecting web

22

shell

24

bolt

25

end cap

26

compression spring

27

first locking screw

28

recess

29

second locking screw

30

face bow

32

ear tips

34

longitudinal beams

36

crossbeam

38

connecting element

39

bitefork

Claims (5)

Glabella post for use with a dental facebow with a rod ( 12 ), which at their first end ( 12a ) a nose adapter ( 10 ) and a connecting bridge ( 20 ) for connecting the rod ( 12 ) with a facebow ( 30 ), whereby the rod ( 12 ) axially displaceable along a direction on the connecting web ( 20 ) is arranged, wherein the rod ( 12 ) in a sleeve ( 22 ) is guided, which in turn axially displaceable in the connecting web ( 20 ) is guided and lockable on this, and wherein between sleeve ( 22 ) and rod ( 12 ) a force transducer arranged in the form of an elastic element and a display or mark for setting a desired force before is present. Glabellastütze according to claim 1, characterized in that the elastic element is a spring ( 26 ). Glabellastütze according to any one of the preceding claims, characterized in that for locking the sleeve ( 22 ) at the connecting web ( 20 ) a locking screw ( 27 ) is provided. Glabellastütze according to any one of the preceding claims, characterized in that it comprises a recess ( 28 ) and a screw ( 29 ) for placement on a facebow. Device for transferring a jaw model into a chewing simulator, consisting of a facebow ( 30 ) and a glabellar support according to any one of claims 1 to 4, wherein an ideal value is displayed when the force exerted on the force transducer corresponds to the weight of the facebow and the glabellar support.