DE2360552A1 - Metallic fixing pin for individual false teeth - has stump structure fixed on slender, tapering pin section of block with prismatic longitudinal opening - Google Patents

Abstract

The dental pin has a slender, tapering pin section on which a stump structure is fixed and consists of a metallic block with a prismatic longitudinal opening, corresp. to a prismatic pin profile on the outer end of the pin, so that the stump structure is displaceable on the outer end of the pin. Preferably the tapering section is in two parts one with a greater taper than and lying in the middle part of the pin, with the other section toward the root tip. The pin and structure are of a Co-Cr-Mo alloy or a Ta alloy. Time required to set the pin in the tooth root is shortened.

Description

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GEORG DIETZ
8 Munich, Freischützstr. 20th

Metallic fixation pin for attaching teeth

It is already known to fix tooth roots that can still be preserved in their position by means of a fixation pin so that a tooth crown can be placed on the tooth root. . . \

For this purpose, previously standardized fixation pins have been used different sizes used, each only for one Root drilling with a given diameter were determined. Such a fixation pin consists of a cylindrical one or see tapered pin section with a widening applied to the upper end of the section, which is formed in one piece with the pin portion and which is commonly referred to as a butt build-up and serves to hold the crown. The opening provided in the crown corresponds to the holding of the crown on the root remnant roughly the shape of the stump on structure, while the fixing pin through the tooth root into a pre-drilled

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The implant bed of the jaw is inserted / to be cemented into it in the root area.

The well-known prefabricated pixation pens are either continuously cylindrical or tapered evenly from the core build-up to the tip; In addition, threaded pins that are screwed into the bone have already been used will. ·

The conically tapered pin allows for a better one Fitting of the pin in the root area and facilitates an upward flow movement of the to the connection used cement.

It was the case with the known pins, regardless of whether they were cylindrical or conical difficult to achieve an axial adjustment as well as an adjustment in the diameter range, because the post must penetrate just enough for the core build-up to sit on the upper end of the tooth root. It was therefore, when adapting the fixation pin, it is necessary to remove it from the hole and remove the hole deepening what made inserting the pen time consuming.

The invention is based on the task of reducing the amount of work involved in inserting the fixation pin into the To shorten tooth root.

This is achieved according to the invention in that the The core build-up consists of a metal block with a prismatic longitudinal opening that has a prismatic pin profile

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at the outer end of the pin, so that the core build-up is displaceable at the outer end of the pin.

The design according to the invention makes it possible to test the fixation pin in a pre-drilled hole insert the root of the tooth until the central, tapered section of the fixation pin touches the also approximately tapered opening of the tooth root, whereupon the core build-up on the post until it hits the root preparation surface is moved and the pin is cut off or drilled off at the upper end of the core build-up.

The application of a slidable attached to the fixation pin The core build-up was previously made with prefabricated Fixation pins are not used, but are only known in connection with the production of a matrix made of plastic. A cylindrical pin was used in the root hole was inserted and a plastic attachment slidably attached to the cylindrical pin Moved until it hits a recess in the root surface. Then the pen with the thus adjusted attachment taken from the root hole and used as a die for the production of a final Fixation pin with metal stump build-up used, whereby only the metal stump build-up could no longer be moved. The known method of making such a pen is very expensive because of the casting process required.

In a further embodiment of the invention, the tapering pin section is designed in two parts, with one Section with stronger taper in the central area

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of the post, to which a slim, tapered inner post end facing the root tip is connected.

According to a preferred embodiment of the invention existing post and the core build-up made of a chrome-cobalt-molybdenum or a tantalum alloy.

The invention will then be described in more detail using an exemplary embodiment shown in the drawings. Show it:

Fig. La - f known embodiments of fixation pins,

2 shows a fixation pin according to the invention in its position in the tooth root,

Fig. 3 shows a section along the line 3-3 eier Fig. 4 and

4 shows a side view of a fixation pin according to the invention.

Figures la and Ib show known fixation pins, with a cylindrical pin portion 1 and a gradually conically tapering pin section 3 are equipped and each one associated Have core build-up 2 which is integrally connected to the pin.

Figures Ic and Id show another known one Fixation pin, which has a two-part pin section that is made up of a conical

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tapering pin section 4 and one adjoining it cylindrical pin portion 5 composed. During the manufacture of this fixation pin first a matrix 6 made of plastic, which corresponded to the opening in the tooth root 8 and starting a metallic pin section was made from this die, which © it was connected to a metallic pin end 7 to finally get into the tooth root or the Bone 18 to be inserted. In Fig. Id is the crown placed on the tooth root 8 with the reference number designated.

Figures le, If show a further embodiment a known ixation pin 9, which was also produced using a die. to For this purpose, a cylindrical fixation pin 10 was used, on which a core build-up 12 is displaceably arranged is. The pin 10 was inserted into the tooth root 11 according to the known method and that made of plastic Existing core build-up then up to butting moved to the other tooth root. Then the one from the pin 10 and the one fixed on it Plastic attachment 12 again from the existing arrangement Bore removed and used as a die for casting production a final fixation pin can be used. The production of the known fixation pin according to FIG. Ie was therefore extreme due to the casting process required time consuming.

The present invention provides a fixation pin made available in which all adjustment problems are switched off to the root canal without a casting process is required for its production. A according to the invention trained fixation pin is shown in Fig.

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shown. This pixation pen consists of an outer section 13 with a prismatic cross-section, an adjoining conical section 15 with a relatively strong taper and another, conical end section 17 adjoining the conical section with a relatively weak one Rejuvenation. On the section 13 with a prismatic cross-section, a metal block 14 is slidably arranged, whose, The dimensions of the central opening 18 correspond to the size of the prismatic cross section of the section 13. As a result of the prismatic cross-section, the metal block is longitudinally displaceable, but against twisting Section 13 of the pixation pen secured. The metal block preferably has a cylindrical outer circumference and plane-parallel end faces.

Preferred sizes for the transdental area are about 30 mm and for the ennossal area 17 mm, the fixation pin extending from a maximum dimension ρ of 3 mm over an average diameter range of d. = 0.9 mm tapered to a final diameter dp of 0.5 mm. The outside diameter of the metal block is preferably 3 mm and the length L of the metal block is approximately 6 mm.

Fig. 2 shows the arrangement of the fixation pin according to the invention in a tooth root. The fixation pin 13 is pushed into the root bore with an approximately conical course until the conical section comes to rest on the conical wall 20 of the wort bore.

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The metal block 14 is then shifted downward on the prismatic pin section until the lower edge of the metal block on the upper edge of the tooth root 16, i.e. on the root preparation surface. Then it will be cut off the pin at the upper end of the core build-up 14 or drilled off. In Fig. Id is the position of a schematic Crown 19 indicated.

When using the fixation pin according to the invention, the combination of the conical, in the area the pin section lying on the tooth root with the displaceability des'metallic core build-up all problems of adaptation of the fixation pin to the tooth root is easily released without an additional Process stage for producing a die and for casting the pin are necessary.

The fixation pin and the associated core build-up exist both made of the same alloy, preferably a chromium-cobalt-molybdenum alloy or a Tantalum alloy is used.

In Fig. 3 is the cross section of the prismatic pin part bounded by straight lines that form the two sides of a parallelogram; However, these pages could also formed by curved lines.

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Claims (5)

221075 December 5, 1973 Claims Fixation pin for dental treatment, with a slim, tapering pin section on which a core build-up is placed, characterized in that the core structure (14) made of a metal block with a prismatic longitudinal opening (18) consists of a prismatic pin profile (13) on the outer pin end so that the core build-up at the outer end of the post is movable. 2. Fixation pin according to claim 1, characterized in that that the tapering pin section is designed in two parts (15 * 17), with one section (15) with a stronger taper in the middle area of the pin, to which a slim tapered one the inner section (17) facing the root tip connects. 3. Fixation pen according to claims 1 and 2, characterized marked that the post and the core build-up . consist of a chromium-cobalt-molybdenum alloy or a tantalum alloy. 509825/0029