RU154845U1 - IMPLANT PRINTING SPOON - Google Patents

Abstract

1. Implantation impression tray for impressions from the upper jaw, containing a frame consisting of a base, a bead and a handle, equipped with holes for the exit of excess impression mass and holes for fixing the liner, characterized in that the base of the frame has a convex palatine part with a V-shaped shape at the base, and the base of the frame, with the exception of the palatine part and a narrow strip extending from its top in the middle of the base, as well as a narrow strip along the perimeter of the base, is cut out, cuts for ksatsii protrusions removable polymeric liner, wherein the frame is made of spoons metalla.2. Implantation impression tray according to claim 1, characterized in that in the lower part of the side to the left and right there are three slots for fixing the protrusions of the removable inserts. 3. The implant impression tray according to claim 1, characterized in that the openings for the exit of the excess impression mass on the sides of the spoon are round.

Description

The utility model relates to medicine, namely to orthopedic dentistry, dental implantology, and can be used in implant prosthetics to take an impression from the dentition of the upper jaw.

The quality of the impression of the implants has a decisive influence on the quality of the implant prosthesis, and ultimately on the life of the implants and the fixed orthopedic structures. Imprinting with implant prosthetics has a number of additional difficulties. A special device for transferring the spatial position of the implant onto the model is an impression transfer adapter, which is inserted into the implant and fixed with a screw before taking the impression. Moreover, the transfer adapters with screws in the implants significantly extend along the length relative to the level of the rest of the dentition. After extracting the impression from the oral cavity, the transfer remains in the impression and sets the direction of the implant analog in the model.

Currently, direct implant prosthetics is widely used, in which the installation of temporary implant prostheses occurs on the day of the implant installation operation. Moreover, upon receipt of the impression, it is difficult to review the connecting elements of the implant shafts due to bleeding and collapse of the tissues surrounding the newly introduced supports. All this makes it difficult to obtain a print, affects its accuracy. In case of mismatch of temporary implantation heads included in the body of a temporary polymer prosthesis and platforms

implants need to re-print and create a new design.

Most often, a standard metal collapsible sectional spoon for the impression is used to obtain an implant impression of the upper jaw. A similar impression tray with removable segments for dental implant adapters is described in US Pat. No. 6,486,078, IPC A61C 9/00, publ. 10/22/2002, The frame of the spoon consists of a handle, sides, a base with a convex palatine part, which has a U-shaped cutout in the exit zones of the transfer adapters, which is closed by successive removable segments. The palatine part is connected to the frame of the spoon. Removable (L-shaped) segments are attached to the frame of the spoon with screws. Before receiving an implant impression from a spoon, dismantle those segments that overlap the output of the screws fixing the implant adapters and check it in the oral cavity. To facilitate the search for screws of impression adapters after polymerization of the material, an impression is made with a spoon with the segments removed. The impression tray, on which most segments have been removed, does not give proper compression to the impression mass. At the same time, a large amount of excess material flows out through the uncovered windows. The inconvenience of the spoon is also that the segments of the spoon have to be removed after polymerization of the impression mass directly in the patient’s mouth, which is unsafe due to the risk of the segments and screws getting into the trachea. The procedure for dismantling and searching for fixing transfer screws is laborious and causes discomfort to the patient.

In addition, due to the convex U-shape of the palatal part of the base of the spoon, a significant problem with atrophy and atypical placement of implants is the exit of the impression adapter screws into the base of the metal spoon, which prevents their search and extraction of the spoon from the oral cavity. In the case of an atypical location of the implants in the bone, which is often found with long structures over the entire dentition, the implants and screws of impression transfers usually fall into the frame and are blocked in it, because of which it is necessary to saw a metal spoon - a diamond head is cut through, the spoon is destroyed.

The closest technical solution to the claimed impression spoon is an impression spoon (RF patent 2159594, IPC A61C 9/00, publ. 11/27/2000), designed to take impressions of the upper jaw during prosthetics and containing a base with outer and inner sides and

handle. The spoon is equipped with a set of interchangeable uneven palatine bulges, the legs of which, when used, are fixed in the holes made in the base of the spoon along the perimeter of the inner side. The handle of the spoon is made elevated, with a spherical recess on the rear and on the back surface of the base of the spoon on both sides of the handle, tides are also made with spherical recesses, which during operation eliminates the delaying of the patient’s lips and ensures reliable fixation of the doctor’s finger bundle. The spoon has through slots to exit the excess impression mass and fasten it with a spoon. It is possible to manufacture both a denture and a complete denture. The universal design of the spoon, equipped with interchangeable palatal bulges, is technologically advanced and easy to use. However, the design of the prototype with interchangeable inserts with different heights is aimed at improving the accuracy of penetration of the hard palate when prosthetics are removable with dentures.

The disadvantage is that when using the prototype to remove the implant impression, stiffness is not provided, which is the key to the absence of deformation of the impression when removed from the oral cavity. In addition, the problem is the exit screws of the impression adapters in the base of the spoon, which prevents them from finding and removing the spoon from the oral cavity.

The objective of the utility model is to ensure the rigidity of the design of the spoon and its manufacturability, which guarantees reliability and ease of use even in the case of an atypical arrangement of implants in the bone.

The technical result is achieved by the fact that in the implantation impression tray for impressions from the upper jaw, containing a frame consisting of a base, a bead and a handle, equipped with holes for the exit of excess impression mass and holes for fixing the insert, the base of the frame has a convex palatine part with V- shaped at the base, and the base of the frame, with the exception of the palatine part and a narrow strip passing from its top in the middle of the base, as well as a narrow strip along the perimeter of the base, is cut out in the lower part of the side Full slot for fixing protrusions removable polymeric liner, wherein the frame is made of a metal spoon. At the same time, three slots are made in the lower part of the side to the left and right for fixing the protrusions of the interchangeable inserts. The openings for the exit of the excess impression mass on the sides of the spoon are round.

The inventive implant impression tray is shown in FIG. 1, 2, 3, 4 and 5.

In FIG. 1 is a perspective view of a general view of an implant impression tray equipped with an insert.

In FIG. 2 shows the metal frame of an implant impression tray.

In FIG. 3 schematically shows a replaceable insert for the manufacture of an implant impression of a complete dentition.

In FIG. 4 - interchangeable insert for the manufacture of an implant impression of an incomplete dentition (for the right side).

In FIG. 5 - interchangeable insert for the manufacture of an implant impression of the front teeth.

Implantation impression tray is a collapsible device and is a metal frame, equipped with a set of interchangeable inserts of a thin polymer material with stiffeners. The metal frame (Fig. 1 and 2) consists of a base 1, a bead 2, and a handle 3. The base 1 of the frame has a convex palatine part 4 having a V-shape. The base 1 of the frame, with the exception of a narrow strip 3-5 mm wide along the perimeter of the base, as well as a narrow strip 5 (Fig. 2), passing in the middle of the base, and with the exception of the palatine part 4, is made hollow - has cutouts 6. The bead 2 is equipped with holes 7 to exit the excess impression mass. Holes 7 are round in shape. In the lower part of the side 2 on the left and right, respectively, three slots 8 are made for fixing the removable liners 9. The handle 3 has a curved shape.

Replaceable insert 9 (Fig. 1, 3, 4 and 5) made of thin polymer material, made convex in relation to the sky, has the form of palatine bulge, repeating the arch of the sky, and is equipped with protrusions 10 for fixing in the slots 8 on the side of the frame. The protrusions 10 are rectangular. The interchangeable liner (Fig. 3) has a V-shaped cutout 11 and a stiffener 12. Stiffener 12 is a reinforced strip extending from the top of the V-shaped cut in the center through the entire liner. The edges of the liner are also reinforced along the contour - made of a thick layer of polymer.

The interchangeable insert for the manufacture of an implant impression of a complete dentition (Fig. 3) has six protrusions (three on each side). The replaceable insert for the manufacture of an impression of the implants in the area of the dentition (incomplete impression) (Fig. 4 and 5) has additionally reinforced sections 13 made of a thick polymer layer.

The device operates as follows. Before taking the impression, the doctor selects a spoon in size. The spoon is selected so that its side 2 is 3-5 mm from the alveolar ridge. Before removing the impression, an insert is placed in the frame of the implantation impression tray and lightly pressed on top of it. The liner latches (Fig. 1). At the same time, the edges of the liner 9 on the perimeter rest on a narrow strip of the base 1 of the spoon, and the convex palatal part 4 of the spoon, which is also V-shaped in its base, appears in the V-shaped cut-out of the liner. The protrusions 10 of the liner 9 are fixed in the slots 8 on the side 2 of the spoon. From above, the spoon is filled with the impression mass, after which the doctor, holding it by the handle 3, makes the impression. The spoon is inserted into the oral cavity, the doctor controls the placement of the spoon in the oral cavity along the handle of the 3 spoon, which should be located along the line of closure of the lips and coincide with the median line of the face. At the same time, at the exit points of the implant adapter screws, a thin polymer insert breaks through. The adapters fix the exact position of the implants in the impression mass without getting stuck in the metal frame of the spoon, since the frame is cut out in the exit zones of the transfer adapters. Excess impression mass goes through the through holes 7, thereby fastening the mass with a spoon. After polymerization of the impression mass, the doctor unscrews the screws of the transfer adapters with a screwdriver, removes them. Then the spoon with the impression and implant adapters located in it is removed from the oral cavity.

To remove the impression of the complete dentition with implants, a replaceable insert (Fig. 3) made of a thin polymer is used. For the manufacture of the imprint of the implants on the left (Fig. 4) or on the right, use the corresponding insert with hardened areas. In it, a thin layer of polymer material is located in the exit zones of the implant adapters. To produce a print of only the front implants, it is possible to use an insert for the front teeth (Fig. 5).

The frame of the implant impression tray can be reused. Polymer liners are for single use only. Their construction uses a thin polymer material that breaks through at the points of contact with the screws of the impression adapters, thereby releasing them and providing access to them. According to the most typical arrangement of implants, interchangeable inserts have several versions that differ in the location of hardened sections. In liner areas where no

need to release the screws, for stiffness, material from a thick polymer layer is used. Depending on the purpose of the application, the required insert is selected by the doctor. So, to get an impression from the jaw, in the alveolar process of which the implants are fixed in the area of molars, premolars and incisors on the left and right, an insert is used to make an implant impression of the complete dentition. And in a removable insert for obtaining an impression from the jaw, in the alveolar process of which the implants are fixed in the area of molars, premolars and incisors, only on the left the right part of the insert is made of thick polymeric material, since there are no transfer screws in the right part of the jaw. Thus, the complete set of inserts with various hardened areas allows you to remove incomplete prints without undue discomfort for the patient.

The design of the device, the manufacture of a metal frame, as well as the execution of a polymer liner with stiffeners provide the necessary rigidity. Rigidity is a prerequisite for obtaining an accurate impression, giving proper compression to the impression mass. Also, the rigidity of the structure is the key to the absence of deformation of the impression when removed from the oral cavity, which is of particular importance for implant prosthetics.

At the same time, the claimed device is technologically advanced. The presence of a V-shaped cutout at the base of the metal frame makes it easy to obtain accurate impressions, even in the case of an atypical arrangement of implants in the bone, which happens almost always with extended structures over the entire dentition. This shape of the cut-out eliminates the blocking of the screws of impression transfers-adapters in the frame. Implantation impression tray, equipped with a set of interchangeable inserts, provides reliability and ease of use. A thin polymer insert breaks through and allows you to accurately fix the exit points of the implant adapter screws. Thus, the design provides ease of preparation of the spoon and ease of access to the technological screws of the adapters with the stored rigidity. In general, the use of a spoon reduces the time for clinical reception of the patient.

An experimental batch of implant impression trays is manufactured and successfully operated.

Claims (3)

1. Implantation impression tray for impressions from the upper jaw, containing a frame consisting of a base, a bead and a handle, equipped with holes for the exit of excess impression mass and holes for fixing the liner, characterized in that the base of the frame has a convex palatine part with a V-shaped shape at the base, and the base of the frame, with the exception of the palatine part and a narrow strip extending from its top in the middle of the base, as well as a narrow strip along the perimeter of the base, is cut out, cuts for ksatsii protrusions removable polymeric liner, wherein the frame is made of a metal spoon. 2. Implantation impression tray according to claim 1, characterized in that in the lower part of the side on the left and right there are three slots for fixing the protrusions of the interchangeable inserts. 3. The implant impression tray according to claim 1, characterized in that the openings for the exit of the excess impression mass on the sides of the spoon are round.

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