DE10305234A1 - Locking device for removable dental crown, comprising specifically shaped plug area and control pin - Google Patents

Abstract

The device (2) is assembled of a housing with a locking plate (214) in the shape of a teardrop, a radial positioned locking bolt (222), and a spring supported, axially movable control pin (22). The upper end of the device (2) has the shape of a twin cone and is provided with several axial slots (212a). For use the device (2) is inserted into the lower area (12) of the removable crown (1), a plug element accommodated within the twin-cone area pushed against a matching cavity (13) in the lower surface of the crown (1) and the locking bolt (222) moved into the required position.

Description

The invention relates to a bolt lock insert for mounting in a housing-like Admission in a removable, dental prosthesis, the Use a spring-loaded latch for releasable attachment of the prosthesis on a crown and the bolt through a slot in one bolt housing with a different diameter protrudes outwards and over one coaxial from the bolt housing outward protruding actuating pin is displaceable in the axial direction and a closure element for the Recording in the prosthesis is provided.

Bolt lock inserts of the type mentioned are from the DE 35 04 638 C1 known. A method for attaching such a bolt lock insert is from the DE 42 06 372 C2 known. Such a known bolt lock insert has a spring-loaded bolt which is slidably housed in a cylindrical bolt housing. The bolt itself is arranged on a bolt axially displaceable against a spring pressure and protrudes outwards through a slot in the bolt housing and is used for locking on a corresponding nose on the primary crown. The bolt housing itself, which receives the bolt and a compression spring, is closed on its side opposite the bolt by a screw plug. The recording for this Riegelver closure insert in the prosthesis is according to the DE 42 06 372 closed by a stopper which is pushed onto the outwardly projecting bolt and held in the receiving opening with a snap ring. Such a bolt lock insert is molded in using known modeling methods with the aid of auxiliary parts.

Has proven to be particularly disadvantageous himself to lock the Plug for use in the insert. This plug needed a relatively large one installation height and can therefore only slightly the attachment of the insert is shortened become. With this known plug, the entire Bolt insert held securely in the receptacle.

The object of the invention is inside, a bolt lock insert of the type mentioned at the beginning to simplify its assembly and to reduce machining costs to design.

The invention task is solved with a bolt lock insert with the features of claim 1.

The one with the same effect with respect to the prior art bolt lock insert according to the invention can easily with its push button-like, radially resilient Approach in the appropriately trained socket in the prosthesis or a prosthetic saddle can be fixed without tools. At the other End of its latch housing is as a closure element a plate is formed so that after the use of the bolt lock insert in the prosthesis the latch is both attached and with its Record for closes this insert in the prosthesis. It protrudes through the plate through the actuating bolt outward. A such closure plate needed only a low construction height, so that after the installation, a cheap machining adjustment the shape of the prosthesis, part of which can be a secondary crown can. This plate can be in height severely cut because it does not have a fixing function.

Another advantage of such molded plate, which has no fixing function in that the plate size matches the necessary form of admission in the prosthesis to be adjusted can. This is due to the appropriate bolt lock insert essentially keyhole shaped. To their coverage therefore either a slightly larger keyhole-shaped floor plan or a teardrop-shaped Plate.

According to a preferred embodiment the invention is the bolt lock insert according to claim 2 characterized in that the bolt housing with a plug on the pushbutton-like Side lockable is. This stopper is supported after mounting on the bottom of the corresponding undercut holder in the prosthesis.

Further features according to the invention are based on the illustrated embodiment in the following explained in more detail. It demonstrate:

1 : The view of a bolt lock insert,

2 a longitudinal section through the use in 2 .

3 and 4 : the two end views of the insert and

5 : in a schematic sectional view, the use of the latch lock insert on a prosthesis.

The bolt lock insert is overall with the number 2 designated. His latch housing 21 has an integrally formed, approximately teardrop-shaped plate at one end 214 through which an actuating bolt 22 is guided axially outwards. This actuating bolt 22 is in the latch housing 21 with a tubular section 221 in the tubular part 211 slidable against the pressure of a return spring 23 , On the tubular section 221 of the actuating pin 22 is protruding vertically outwards the bolt 222 molded on by a slot 213 in the bolt housing 21 protrudes outwards into the secondary crown 14 ,

The latch housing 21 points at its the actuating bolt 22 opposite end a button-like approach 212 on, which has the shape of a double cone and is otherwise formed as a longitudinally slotted sleeve section. The longitudinal slots have the number 212a , The end of this approach 212 forms a bulge 212b , With this approach 212 can the latch housing 21 in a correspondingly undercut design 13 of a prosthetic saddle 11 how he out 5 it can be seen, to be detonated. The corresponding prosthesis 1 is in 5 also hinted at. The insertion opening for the latch lock insert 2 is in 5 with the number 12 indicated.

How out 2 the tubular section can be seen 221 of the actuating pin 22 who the compression spring 23 picks up through a stopper 24 closed, the inside of the approach 212 of the latch housing 21 is inserted. After assembling the entire insert 2 in the recording 13 of the prosthetic saddle 11 is this stopper 24 at the bottom of the recording 13 fixed via the snap-like locking. The stopper 24 has a tubular extension 242 to protect the spring 23 against pollution caused by the slot in the bolt housing 21 for the latch 222 could penetrate.

After assembling the insert 2 closes the molded plate 214 due to the appropriate shape, the insertion opening 12 the recording 13 , After that, the plate 214 according to the desired shape of the prosthesis 1 be adjusted or shortened. The part of the actuating bolt protruding outwards is also shortened 22 ,

1

prosthesis

11

prosthetic saddle

12

insertion opening

13

admission

14

secondary crown

2

Bolt lock application

21

bolt housing

211

tubular part

212

approach

212a

longitudinal slot

212b

beaded edge

213

insertion opening

214

plate

22

actuating pin

221

tubular section

222

bars

23

compression spring

24

Plug

241

conical section

242

tubular section

Claims (5)

Bolt lock insert for attachment in a housing-like receptacle in a removable dental prosthesis, the insert having a spring-loaded bolt for releasably fastening the prosthesis to a crown and the bolt protruding outwards through a slot in a bolt housing with a diameter and via a coaxial one Lock housing projecting outward actuating bolt is displaceable in the axial direction and a closure element is provided for receiving in the prosthesis, characterized in that on the actuating bolt ( 22 ) opposite end of the latch housing ( 21 ) a push button-like, radially springy approach ( 212 ) with which the housing ( 21 ) in a correspondingly undercut image ( 13 ) in the prosthesis ( 11 ) can be locked in place and that at the other end of the bolt housing ( 21 ) one of the insertion openings as a closure element ( 12 ) the recording ( 13 ) in the prosthesis ( 1 . 11 ) corresponding plate ( 214 ) is molded on. Bolt lock insert according to claim 1, characterized in that in the interior of the actuating bolt ( 22 ) a compression spring ( 23 ) is arranged, which has one end on one of the push button side of the bolt housing ( 21 ) conical stopper ( 24 ) and with the other end inside the actuating bolt ( 22 ) is supported, whereby the plug ( 24 ) after installing the insert ( 2 ) in the recording ( 13 ) the prosthesis ( 1 . 11 ) supports. Bolt lock insert according to claim 2, characterized in that on the plug ( 24 ) on Pipe neck ( 242 ) is molded on. Bolt lock insert according to claim 1, characterized in that the plate ( 214 ) on the bolt housing ( 21 ) is designed in the shape of a drop or a keyhole to cover a corresponding one in the prosthesis ( 1 . 11 ) formed insertion opening ( 12 ) for use ( 2 ) with the from the latch housing ( 21 ) outstanding bar ( 222 ). Bolt lock insert according to claim 1, characterized in that the double-cone-shaped extension ( 212 ) several longitudinal slots ( 212a ) and an end bead ( 212b ) having.