DE3528621A1 - REGISTRATION UNIT FOR DETERMINING THE BIT SITUATION, IN PARTICULAR FOR PRODUCING A TOTAL PROSTHESIS - Google Patents

Abstract

Recording device for determining the position of the lower jaw in relation to the upper jaw during central occlusion. Three parallel-arranged sleeves (Fig. 2.1) each provided with a thread are polymerized on the individually-produced imprint spoon (Fig. 1.1) and equipped with screws, the length of which can be adjusted by modifying the screwing-in depth. With the additional aid of a correspondingly-shaped bite-fork it is possible to fix with these screws a recording indicator plate (Fig. 7) in the occlusion plane of the patient. The recording indicator plate is equiped with an extension to receive a transfer base (Fig. 7.6). The functional spoon for making the imprint of the lower jaw is provided with three or four parallel-arranged pins (Fig. 4.2) allowing the acceptance of a plate that carries a recording stylus (Fig. 3.1) which, depending on the operating pressure in the lower jaw, is varied in height in such a way that, after contact has been made by the recording stylus on the upper jaw recording indicator plate, the patient exhibits a jaw separation of 2-3 mm under the suspension position at rest, and in such a way that depending on the colour-mmarking of the upper jaw recording indicator plate, it is possible to record the arrow angle in a typical manner. To code the recording, use is made of a modified pen plate which ensures that the pen can reproduce the acquired arrow angle (Fig. 7.1) at the same height and same position. A wedged-shape accessory (Fig. 7.2) ensures, after fixing on the recording plate by linear application on the modified recording stylus plate in combination with locking of the stylus, reliable three-point support and coding of the recording.

Description

When manufacturing a full denture, however, too a partial prosthesis, provides the registration the bite position one for a satisfactory end result essential work step.

This is the determination of the jaw relation, d. H. around the three-dimensional definition the lower jaw position to the upper jaw, mostly the bite position in the final bite position is determined.

With the common method of hand biting Base plates on the according to functional imprint presented upper and lower jaw models with wax walls provided, which accordingly in the mouth of the Align patients to the occlusal plane taking the vertical jaw relationship from rest hover, reduced by 2 to 3 mm. In the end the upper and lower jaw wax walls are bitten together merged.  

Registration in the targeted terminal Hinge axis position is in with this method in many cases, it can only be reached approximately also the support pin registration under recording the arrow angle, e.g. Currently the most precise method for Bite position determination, is liable in the form practiced today the main mistake indicates that the manufactured Base plates are based on the functional models are, but neither here nor in the mouth of the Ensure patients a snug fit.

The invention relates to a multi-part cutlery, the functional imprint, hand bite and support pin summarized in one step. It saves patient and dentist two appointments, allows faster work and delivers more precise Results.

The registration device (according to the invention) is characterized in that an individual upper jaw impression tray ( Fig. 1.1) is prepared before taking an impression by three sleeves ( Fig. 2.1) with an internal thread, which with the aid of the registration plate ( Fig. 1.2) and corresponding screws with screw heads that are flat to the plate ( Fig. 2.2) are placed in parallel and polymerized with plastic ( Fig. 3.1), the retention pins of the respective sleeves ( Fig. 2.2) being shortened accordingly, and the registration marks on the plate are indicated in parallelism is set to the occlusal plane.

The screws and registration plate are then removed and the functional impression ( Fig. 3.2) is taken with the impression tray prepared in this way.

A screw ( Fig. 2.3) can now be screwed into each sleeve, which is available in variable lengths and is characterized in that instead of a normal screw head after conical tapering ( Fig. 2.3.1), it has a second, smaller thread ( Fig. 2.3.2), which is selected in its length so that the protruding part after placing the registration plate on the cone portion can accommodate a fixation nut ( Fig. 2.4).

Prepared in this way, the functional impression is reduced in the patient's mouth and the modified bite fork ( Fig. 4) with its oral portion ( Fig. 4.1), which contains holes ( Fig. 4.1.1), identical to the registration plate, on the cone portions of the screwed screws. By turning the screws, the bite fork is adjusted to the bipupillar line and the Frankfurt horizontal, by changing the distal screws the parallelism to the bipupillary line, then by rotating the anterior screw, the parallelism to the Frankfurt horizontal is created. Changing all three screws identically lowers or lifts the bite fork into the occlusal plane.

In the following step, a pad that can be moved on the bite fork ( Fig. 4.2) can be moved to modify the lip fill and marked with the reference lines center line, canine line and smile line.

The bite fork is removed and identical Screw position after removing the maxillary radio tional imprint placed on the registration plate and fastened with the fixation nuts.

The pen ( Fig. 5.1) for recording the arrow angle is mounted in the center of a metal plate ( Fig. 5.2), which has two rows of drill holes ( Fig. 5.3) and can hold the pens ( Fig. 6.1). This also carry a retention part (Fig. 6.2) and between the pin and retention part is a plane support surface (Fig. 6.3) is mounted.

Four of these pens are placed in the direction of the central pen, i.e. from below and from above by means of e.g. B. Adhesive wax fixed. Alternatively, the pins themselves are also conceivable as threads that can be attached to the plate with fixation nuts. With this procedure, the four drill holes are selected (marked black in Fig. 5) that allow the pins to be polymerized ( Fig. 6.4) on the individual mandibular tray over the alveolar ridge. The retention pins are shortened beforehand in order to maintain approximately parallelism with the registration plate, moreover, the pin should hit the center of the registration plate in the patient's mouth. After grafting, the fixation of the pins on the plate (sticky wax or fixation nuts) is dissolved, wherein the individual mandibular spoon is prepared for the print function (Fig. 6.5).

In the next step, the maxillary functional impression with the attached registration plate is placed in the patient's mouth. The pen plate with the selected holes is placed on the pens on the functional impression of the lower jaw, which is also repositioned. The height of the pen is changed so that the distance between the extraoral marking points on the patient is 2 to 3 mm below the level at rest. Now the registration plate is typically color-marked with a bold pencil and the arrow angle is recorded again after repositioning ( Fig. 7).

It is encrypted e.g. B. with impression plaster (Fig. 7.1), the retention in the triangular recesses of the registration mark plate (Fig. 1.3) and the write pin plate (Fig. 5.4) takes place. Before this, the fixation nuts of the registration plate are removed and a plastic plate is glued to the tip of the arrow, in whose hole the pen can engage when the jaw closes ( Fig. 7.2).

After the registration has been removed, the screws can be removed a transfer sheet is put on and adjusted.

After the functional impressions have been poured out, they are switched on articulate the upper jaw with the help of transmission sheet, inserting the registration, the one-piece the lower jaw. Finally, the functional Footprints peeled off after plastering the bite fork the reference lines from the pad gripped and transferred to the plaster.  

It is envisaged that the cutlery set Screws for changing the registration plate contains in different sizes to suit individuality of the respective intraoral conditions wear.

Claims (2)

1. Registration unit for determining the bite position (meaning the registration of the position of the lower jaw to the upper jaw in a centric occlusion) and their fixation, characterized in that three parallelized and threaded sleeves are polymerized on the individually made impression tray, which, according to the functional impression, are polymerized with Screws are provided, which are shaped accordingly and variable in length by changing the screw-in depth and with the help of a correspondingly shaped bite fork, the fixation of a registration plate in the occlusal plane of the patient, aligned with the bipupillary line and the Frankfurt horizontal line. The functional spoon for taking impressions in the lower jaw is provided with four parallelized pins that allow the inclusion of a plate that centrally carries a height-adjustable pen that is varied in height according to the functional impression in the lower jaw so that after contact of the pen with the upper jaw registration plate the patient had a jaw spacing of 2 to 3 mm below the limbo, and that after color marking the upper jaw registration plate the recording of the arrow angle is typically possible. 2. The essential feature of the registration unit after Claim 1 is characterized records that a suitably prepared individual maxillary impression tray according to Funk tion impression by a mechanical auxiliary device the adjustment of a registration plate in allows the patient's occlusal plane, and that a suitably prepared individual Lower jaw impression tray according to functional impression can hold a pen that matches the patient's vertical jaw relationship, the recording of the arrow angle allowed.