RU2276970C2 - Endodontic and endoosseous implant - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: implant can be used in orthopedic and surgical dentistry for restoration of anatomic shape and function of separate of teeth as well as for substituting defects of tooth rows by removable and non-removable denture having support elements onto implant. Endodontic and endoosseous implant is made in form of rod that has intraosseous part covered with rifling, intra-root part and crown part onto which the artificial tooth crown is installed. Crown part has part of rod with height of 3 mm and it has diameter to be 0,2 mm bigger than diameter of intraosseous and intra-root parts. Junction between parts is made smooth. Crown part also has rod made with height of 2 mm and cross-section in form of square. Length of side of square is 0,1 mm shorter than diameter of crown part of rod. Intraosseous part has olive-like top. Intra-root part is made rough.

EFFECT: simplified design.

2 cl, 1 dwg

Description

The invention relates to medicine, in particular to orthopedic and surgical dentistry, and can be used to restore the anatomical shape and function of individual teeth, as well as to replace dentition defects with removable and fixed prosthetic structures with supporting elements on the implant.

Known endodontic-endoossal implant (EEI), consisting of an intra-root part containing a cylindrical rod of a larger diameter, which includes a cylindrical rod of a smaller diameter, having a length of an intra-root part and an intraosseous part, the upper part of the shaft has a crown part on which an artificial tooth crown is mounted ; the drawing shows the gingival surface, the root of the tooth, the fixing layer of phosphate cement; rods and have a threaded connection 2 along the entire length of the intraroot portion of the rod, and the intraosseous part of the rod is covered with a screw thread; an additional fixing rod is screwed into the upper part of the shaft, having the shape of a hexagon (RF Patent No. 2209049, IPC 7 A 61 C 8/02 Endodonto-endossal implant: Arutyunov S.D., Grigoryants L.A., Movsesyan G.V., Mokhov A.V., Zhululi G.N. / Moscow State Medical-Dental University. Bull. No. 21, 2003).

The disadvantages of this endodontic-endossal implant are:

- the complexity of the technical implementation of the surgical intervention to establish;

- the high cost of the implant due to the complexity of the design;

- just one size, which narrows the scope of implant use due to the large spread of the anatomical parameters of the root canals in various groups of teeth;

- EEI design is intended for single-rooted teeth.

The objective of the invention is to increase the biomechanical parameters of teeth with resected roots by increasing the functionality and physico-mechanical parameters of EEI; simplification of implant design; providing the possibility of using the implant both for single-root teeth and for multi-root teeth with a large spread of the anatomical parameters of the canals; providing the possibility of manufacturing a precision (accurate) design of an artificial crown.

This is achieved due to the fact that the coronal part of the rod includes a part of the rod 3 mm high and 0.2 mm in diameter larger than the diameter of the intraosseous and intraroot parts, the transition being smooth, and the pin, integral with the rod, is 2 mm high a cross-section in the form of a square with a side length 0.1 mm smaller than the diameter of the rod; the intraosseous part has an olive-like apex, and the intra-root part is roughened; a monolithic plastic suprastructure 6 mm high is put on the crown part of the implant, having a square at the base, turning into an inverted truncated cone.

EEI can be made in 6 sizes with a total shaft length of 21 mm or 23 mm and a diameter of intraosseous and intraroot parts equal to 1.0 mm, or 1.2 mm, or 1.4 mm.

The presence on the implant rod of a pin, monolithically connected to it, 2 mm high with a cross-section in the form of a square with a side length 0.1 mm smaller than the diameter of the core part of the rod, facilitates the technical implementation of the surgical procedure, smooth transition of the crown part, including a part of the rod 3 high mm and a diameter 0.2 mm larger than the diameter of its intraosseous part and the intraosseous part having an olive-like apex reduce the functional load in the area of the implant apex; the intra-root portion, made rough, increases the reliability of fixation by increasing the surface area fixed by cement to hard root tissues; a monolithic plastic suprastructure 6 mm high, worn on the crown of the implant, and the presence of a square at its base, turning into an inverted truncated cone, allows you to transfer the clinical situation of the oral cavity to the technician's desk, which ensures the manufacture of a precision artificial crown design. Suprastructure is a purely technological detail and is intended for the subsequent manufacture of an artificial crown. EEI can be made in 6 sizes with a total shaft length of 21 mm or 23 mm and a diameter of intraosseous and intraroot parts equal to 1.0 mm or 1.2 mm or 1.4 mm, which makes it possible to use the implant as for single-root teeth , and for multi-root.

All EEI parameters are determined by the anatomical features of the roots of the teeth and jaws, worked out experimentally and are optimal for solving the task.

The proposed EEI (drawing) consists of a rod 1, including an intraosseous part 6, covered with a screw thread, an intra-root part 5 and a crown part 7, on which an artificial tooth crown 9 is installed, the crown part 7 includes a part of the shaft 1 with a height of 3 mm and a diameter of 0.2 mm larger than the diameter of the intraosseous 6 and the intra-root 5 parts, the transition being smooth and the pin 8 made integrally with the rod 1 2 mm high with a section in the form of a square with a side length 0.1 mm smaller than the diameter of the crown part 7 rods 1; the intraosseous part 6 has an olive-like apex, and the intra-root part 5 is roughened; monolithic plastic suprastructure 2 with a height of 6 mm is placed on the crown part 7 of the implant, having a square 3 in the base, turning into an inverted truncated cone 4. The drawing shows the gingival surface 10, the tooth root 11, the layer of fixing cement 12.

EEI can be made in 6 sizes with a total core length of 1 21 mm or 23 mm and a diameter of intraosseous 6 and intra-root 5 parts equal to either 1.0 mm, or 1.2 mm, or 1.4 mm.

The proposed EEI is set as follows: the root canal of the tooth 11 is expanded to a diameter corresponding to the diameter of the implant shaft 1. Then, through the root canal of the tooth 11 form a bed for the intraosseous part 6 of the implant with a depth of not more than 5 mm. Fixing cement 12 is introduced into the root canal of the tooth 11 using a channel filler. The rod 1 is inserted through the canal until it stops, then the implant is fixed in the bone tissue with a fixing key applied to pin 8.

A crown is made 4 months after the operation of endodonto-endoossal implantation. Hard tissues of the root of the tooth 11 are prepared in the form of a platform for the future ceramic-metal crown. Plastic suprastructure 2 is attached to the hard tissues of tooth root 11. A small amount of corrective impression mass is applied to the base of the parallelepiped 3 of plastic suprastructure 2, after which superstructure 2 is applied to the crown part 7 of the implant shaft 1. Then get a working and auxiliary prints of both jaws. When removing the working impression from the oral cavity, the superstructure 2 remains in the impression material. Then make gypsum models. Suprastructure 2 is removed from the print. Softened wax is applied to the base of the parallelepiped 3 of superstructure 2, then superstructure 2 is applied to the gypsum model of the crown part 7 of the rod 1. Next, the laboratory technician traditionally models the future frame of the ceramic-metal crown, applies the ceramic coating to the finished frame and transfers the finished ceramic-metal crown to the clinic.

Claims (2)

1. Endodontic-endoossal implant made in the form of a rod, including an intraosseous part, covered with a screw thread, an intra-root part and a crown part, on which an artificial tooth crown is installed, characterized in that the crown part includes a shaft part 3 mm high and a diameter of 0, 2 mm larger than the diameter of the intraosseous and intraroot parts, while the transition is smooth, and a pin connected to the crown part of the rod is made 2 mm high and with a square section with a side length 0.1 mm less the diameter of the crown part of the stem, while the intraosseous part has an olive-like apex, and the intra-root part is roughened. 2. The endodontic-endoossal implant according to claim 1, made with a total shaft length of 21 mm or 23 mm and a diameter of intraosseous and intra-root parts equal to 1.0 mm, or 1.2 mm, or 1.4 mm.