WO2012040796A1

WO2012040796A1 - Device for performing a transgingival implantation

Info

Publication number: WO2012040796A1
Application number: PCT/AZ2011/000004
Authority: WO
Inventors: Эмиль Рустам Оглы ИБРАГИМ
Original assignee: Ibrahim Emil Rustam Oglu
Priority date: 2010-09-29
Filing date: 2011-04-22
Publication date: 2012-04-05

Abstract

The invention relates to the field of medicine, in particular to orthopaedic stomatological devices for tooth implantation. The device for performing a transgingival implantation is in the form of a saddle-like structure comprising a support base and long and short support arms arranged at an identical angle to the base. Openings are formed in the long support arms, and one through-opening with a thread is formed in the short support arms, said openings being formed at an equal distance from the support base and from one another and being intended for screws formed with a pointed end on one side and a hexagon socket head on the other side. With the aid of the screws of the long support arm, the apparatus is fixed on the alveolar ridge. The saddle-like shape of the device is envisaged for fixing the device on the alveolar ridge. The screws are all of identical length. A bush with an internal thread is arranged in the centre of the support base, said bush being intended for connection to a mother cylinder having an inner diameter which corresponds to the outer diameter of the implant. The bush moves only in the direction of the support arms. A daughter cylinder having an inner diameter equal to the outer diameter of a drill for forming a recess in the bone underneath the implant is arranged in the mother cylinder. The movement of the daughter cylinder in the mother cylinder in the clockwise direction and along the vertical during drilling of the bone is limited with the aid of a "lock". The "lock" is produced with the aid of a point projection on the surface of the daughter cylinder and an L-shaped groove located in the inner surface of the mother cylinder. The device also comprises special extension arms intended for determining the position of the mother cylinder relative to the latter screws of the long support arm.

Description

DEVICE FOR PERFORMANCE

TRANSGINGIVAL IMPLANTATION

The invention relates to medicine, in particular to orthopedic dental devices for dental implants.

The transgingival dental implantation technique has several advantages over the traditional one: the formation of an implant bed in the jaw bone is performed without a gum cut, this removes the invasiveness of the operation many times, reduces the risk of edema, and reduces the duration of the operation and the rehabilitation time.

The closest known method for performing transgingival tooth implantation is to perform a surgical template using the ZD [www.dentiplants.ru]. Such a template can be made in a laboratory way or using computed tomography. A more common method of manufacturing an ZD template with computed tomography (CT) involves the following steps:

- using a computer tomograph on the jaw, make sections with a pitch of at least 1 mm. For CT examination of the jaw, the following sections are used to obtain the optimal picture: axial section - divides the body into upper and lower sections; coronary section - divides the body into the front and back; sagittal section - on the right and left parts;

then the results are processed and a spatial image of the jaw is recreated;

- the doctor places virtual implants on the recreated jaw (taking into account the topography of the anatomical zones), then a virtual template is prepared on the jaw. On this template there are guide channels corresponding to the direction and placement of virtual implants;

- using a stereolithographic printer, a real ZD template is prepared from a virtual template. ZD template after cold sterilization is placed in the oral cavity and drilling of the bone is performed through the guide bushings.

At the same time, the ZD template, depending on specific clinical situations, can be fixed on one of the 3 anatomical zones and, accordingly, prepared in three versions. In the first variant, the template provides support on the bone, in the second variant - on the mucous membrane, in the third variant - on the teeth. The first option is not used in the method of transgingival implantation. The disadvantages of using the surgical surgical template are: the duration of the operation planning, the individuality of performing the surgical template for each patient, additional x-ray irradiation of the patient, expensive equipment and expensive procedure.

The present invention is an improvement while reducing the planning time and cost of transgingival implantation of teeth.

The technical solution of the problem is carried out by the claimed device for performing transgingival implantation, which is a saddle-shaped structure designed for fixation on the alveolar ridge. The device includes a support base and long support arms with holes and short support arms with one threaded hole located at the same angle to the base the same distance from the support base and from each other, and provided for screws made with a sharp end on one side and a head for a hex key, on the other, as well as a sleeve with an internal thread located in the center of the support base, a mother cylinder made with an external thread for fastening to the sleeve of the support base, the inner diameter of which is equal to the outer diameter of the implant, the daughter cylinder with an inner diameter equal to the outer diameter of the drill, placed inside the mother’s cylinder and designed for phased drilling of the bone under the implant, moreover, the movement of the daughter cylinder in the mother’s cylinder clockwise Relkom in the vertical direction is limited by a special lock, constructed as a projection of a point on the surface of the matrix and the subsidiary L-shaped slot located on the inner surface of the mother cylinder. The device further comprises extension cords.

A device for performing transgingival implantation is a saddle-shaped structure (Fig 1, 2), comprising a supporting base 1, and long 2 and short 3 supporting arms located at the same angle to the base. Holes are formed on the long support arms, on the short support arms there is one through threaded hole 4 made at the same distance from the support base and from each other, which are provided for screws 5 made with a sharp end on one side and a hexagon head 6 on the other side (Figure 1 ss). Using long screws support arm installation is fixed on the alveolar ridge. The saddle-shaped form of the device is provided for fixing the device on the alveolar ridge (Fig. 3, positions a, b, c). The screws are all made of the same length. In the center of the support base there is a sleeve 7 with an internal thread, designed for connection with the mother cylinder 8 (Fig. 4), the inner diameter of which coincides with the outer diameter of the implant .. The sleeve moves only in the direction of the support arms. A daughter cylinder 9 (Figure 4) is inserted into the mother cylinder, the inner diameter of which is equal to the outer diameter of the drill for drilling the nest into the bones under the implant. The movement of the daughter cylinders in the mother cylinders clockwise and vertically is limited with the help of a special “lock” (for fixing the daughter cylinders while working with a drill). A “lock” is created with a pin protrusion 10 on the surface of the daughter cylinder and an L-shaped groove 1 1 located on the inner surface of the mother cylinder. The leg of the L-shaped groove is guided clockwise. The device also includes special extension cords 12 (Figure 5). Extender functions are described below.

The device is used as follows.

Two identical devices are performed, one of which is fixed on the alveolar ridge, the other serves to simulate the position of the first device outside the oral cavity.

The first device is mounted as a saddle on the area of the alveolar ridge provided for implantation and is fixed to the bones with the help of screws 5 of the long supporting arm (Figure Z). The movement of the screws is carried out with a hex wrench attached to the tip of the physiospenser. At the same time, according to the number of revolutions of each screw in the oral cavity (to calculate the revolutions of the screw, a colored dot is applied to the surface of the Allen key or the threaded part of the screws is painted with a different color paint in 1 mm increments), similar screws of the second device are rotated outside the oral cavity (the starting position of both devices is up to fixation should be the same). After tightening the screws of the device located outside the oral cavity in space, an alveolar bone contour is formed. On the basis of this circuit, the mother cylinder 8 of the corresponding diameter is selected and fixed in the sleeve 7. After the corresponding extension cord 12 is inserted into the mother cylinder (the extensions are used to determine the ratio of the mother cylinder to the latter screws) based on the position of one of the screws 5 of the long support arm, which limits the rotation of the mother cylinder with the extension, set the position of the first screw, and the angle of inclination of the mother cylinder is determined. If, together with the extension cord, the movement of the mother cylinder at any angle is limited, then the screw of the short support arm is twisted until the cylinder is limited to the same angle. (Figure 1c). In this way, the position under the implant is finally modeled.

After that, the selected mother cylinder is placed in the first device in the oral cavity, the screw on the short supporting arm is brought to the position of the short supporting shoulder of the second device opposite to the screw outside the oral cavity (Figure 1c). As a result, the screws of the short support arm of the first device in the oral cavity during expansion of the socket prevent the drill from moving beyond the alveoli (bone) to the inner diameter of the selected mother cylinder. At the same time, the wall thickness of the mother cylinder 1-1.5 mm provides a minimum residual bone thickness between the external contour of the alveoli-bone and the implant, sufficient for bone healing. Inside the mother’s cylinder, placing daughter cylinders with different inner diameters and constant outer diameters equal to the inner diameters of the mother’s cylinders, the nest under the implant is gradually expanded. The drilling depth is determined using an orthopantogram.

Due to the different sizes of implants and drills for drilling nests in bones, made by different companies, it is possible to manufacture the mother and daughter cylinders of the device with different diameters. Based on the size and shape of the alveoli, the device can be made in various shapes and sizes. For example, according to the shape of the alveolar ridge on the front of the upper jaw, instead of the shape of the devices

The claimed device is simple in execution. When using the invention, the patient is not subjected to additional radiation, the planning of implantation is much faster and cheaper for the patient due to the exclusion of expensive diagnostics and modeling, moreover, the device is intended for reusable use.

Claims

CLAIM

A device for performing transgingival implantation, which is a saddle-shaped structure, designed for fixation on the alveolar ridge, includes a support base and long support arms with holes located at the same angle to the base and short support arms with one threaded hole made at the same distance from the support base and from each other, and provided for screws made with a sharp end on one side and an Allen key head on the other, as well as a sleeve with an inner with a threaded thread located in the center of the support base, a mother cylinder made with an external thread for fastening to the sleeve of the support base, the inner diameter of which is equal to the outer diameter of the implant, a daughter cylinder with an inner diameter equal to the outer diameter of the drill, located inside the mother cylinder and designed to phased drilling of the bone under the implant, and the movement of the daughter cylinder in the mother cylinder in a clockwise direction in the vertical direction is limited by means of a special th lock formed as a projection of a point on the surface of the matrix and the subsidiary L- shaped slot located on the inner surface of the mother cylinder, and extenders.