RU155123U1 - IMPLANT PRINTING SPOON - Google Patents

Abstract

1. Implantation impression tray for impressions from the lower jaw, containing a rigid horseshoe-shaped frame, consisting of external and internal sides connected to each other, characterized in that the sides of the frame are connected at the ends by jumpers in the form of an arch, provided with openings for the exit of excess impression mass, as well as slots for fixing removable polymer liners located along the upper edges of both sides, the lower edges of the sides made with bevels at the corners at the ends, the frame of the spoon is made of metal, the spoon is equipped with wife with a pen attached to the middle of the outer side. 2. 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 lower 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. A significant problem in obtaining an impression of the implants is the exit of the impression adapter screws into the frame of the metal spoon and their blocking, which prevents them from finding and removing the spoon from the oral cavity.

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 the temporary prosthesis, and implant platforms, it is necessary to re-print and create a new design.

Known dental impression spoon (patent US 6428315, IPC A61C 9/00, publ. 6.08.2002), which is a collapsible sectional spoon and can be used to obtain an implant impression of the lower jaw - both complete and incomplete (fragments of the jaw ) Such a spoon is not suitable for obtaining an implant impression of the upper jaw, since due to the absence of palatal bulge in the arch structure, it does not provide uniform pressure, which affects the accuracy of the impression. The caracas of the spoon consists of a handle, internal and external sides, connected to the base of an arched shape. Moreover, the entire area of the base is cut out, with the exception of a narrow strip around the perimeter. This U-shaped cutout is closed by sequentially arranged removable segments that are mounted through holes in the frame. Segments can be separated from the base to form an opening in the base. 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 oral cavity, which is unsafe because of the risk of the segments getting into the trachea. The procedure for dismantling and searching for fixing transfer screws is laborious and causes discomfort to the patient.

The closest technical solution to the claimed impression spoon is a dental impression spoon for a partially edentulous jaw and an edentulous jaw with implants (patent US 5520539, IPC A61C 9/00, publ. 05.28.1998). Due to the lack of palatal bulge in the arch, the spoon is also not suitable for obtaining an implant impression of the upper jaw. The impression spoon has a horseshoe-shaped shape corresponding to the shape of the dental arch, and is a collapsible device consisting of a rigid frame and an insert. A ribbed horseshoe-shaped insert having an inverted U-shape in cross section is made of thin material. The edges

liners thickened. In addition, the side edges of the liner are reinforced with a reinforcing insert. The rigid frame is a horseshoe-shaped tray consisting of a base and side walls. In the assembly, the edges of the side walls of the frame are supported by the outer hardened edges of the liner. Moreover, the thin insert itself is inserted into the rigid frame and freely placed in it with the formation of a hollow space between them, sufficient to accommodate a tooth with impression material in it. To take the impression, the dentist makes holes in the thin insert in the required places in accordance with the condition of the patient's jaw. Thus, during the impression process, the teeth, implant adapters and excess impression material protrude through the openings into the free space between the insert and the frame. The advantage of the combined spoon is that the base frame provides the necessary rigidity during the receipt of the impression. Moreover, when removing the rigid frame after polymerization of the material, access to the screws of the impression adapters is provided. The disadvantage is the complexity and duration of preparation for the impression - the doctor, after trying manually, is forced to make holes in the insert using dental tools. When removing the impression from the oral cavity without a rigid frame, deformation is possible.

The objective of the utility model is to ensure the manufacturability of the design and ease of use while maintaining rigidity.

The technical result is achieved by the fact that in the implantation impression tray for impressions from the lower jaw, containing a rigid horseshoe-shaped frame, consisting of external and internal sides, interconnected, the sides of the frame are connected at the ends by jumpers in the form of an arch, equipped with holes for the exit of excess impression mass , as well as slots for fixing removable polymer liners located along the upper edges of both sides, the lower edges of the sides made with bevels in the corners at the ends, the frame of the spoon is made made of metal, the spoon is equipped with a handle attached to the middle of the outer side. 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. Figure 3 schematically shows a removable insert for the manufacture of an implant impression of a complete dentition - top view.

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

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

The implant impression tray is a collapsible device and is a metal frame equipped with a set of interchangeable inserts made of thin polymer material that can break through the pressure of the implant adapter screws when the impression is taken. The rigid metal frame (Fig. 1 and 2) is curved horseshoe-shaped in the form of a dental arch of the lower jaw and consists of an outer bead 1, an inner bead 2 and a handle 3 attached externally to the middle of the outer bead 1. The handle 3 is curved. The sides of the frame are connected at the ends by jumpers 4 in the form of an arch. The lower edges of both sides are made with bevels in the corners at the ends. The sides are provided with openings for the exit of the excess impression mass 5. The holes 5 are round in shape. Slots 6 are made along the upper edges of both sides on the left and on the right, for fixing removable inserts 7.

Replaceable insert 7 (Fig. 1, 3, 4 and 5), made of thin polymer material, has an arched curved shape corresponding to the shape of the frame into which it is inserted. The edges of the liner are hardened along the contour - made of a thick layer of polymer 2-3 mm wide. The liner at the edges is provided with protrusions 8 for fixing in the slots 6 on the sides of the frame. The tabs of the liner are hardened - made of a thick polymer layer. The protrusions 8 are rectangular. The interchangeable insert for obtaining a complete impression of the dentition (Fig. 3) has an additional one reinforced section 9 in the center in the form of a transverse strip 3 mm wide. The replaceable insert for the manufacture of an impression of the implants in the area of the dentition (incomplete impression) (Figs. 4 and 5) has, in places not in contact with the implant adapters, additionally reinforced sections 9 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 inserted into the frame of the implantation impression tray from above and lightly pressed on it. The liner latches (Fig. 1). In this case, the tabs 8

the liners 7 are fixed in the slots 6 on the outer 1 and inner 2 sides of the spoon. Thus, in the assembly, the spoon is an inverted horseshoe-shaped tray. 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. Excess impression mass goes through the through holes 7, thereby fastening the mass with a spoon. 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 only a thin polymer insert is located in the exit zones of the transfer adapters, and the frame is absent. After polymerization of the impression mass, the doctor unscrews the adapter screws 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 thin polymer with a narrow hardened area in the middle 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 the insert for the front teeth (Fig. 5) with hardened areas on the sides.

The frame of the implant impression tray can be reused. Inserts are for single use only. Since the thin liner is made of a polymeric material, it 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 areas of the liner where there is no need to release the screws, material from a thick polymer layer is used for stiffness. Depending on the purpose of the application, the required insert is selected by the doctor. So, to obtain an impression from the jaw, in the alveolar process of which the implants are fixed in the field of molars, premolars and incisors, the insert is used for making

implant impression of a 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 (reinforced sections) 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 metal frame consists of only sides, which 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. Using a spoon allows you to get accurate implant impressions and reduces the time of clinical reception of the patient.

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

Claims (2)

1. Implantation impression tray for impressions from the lower jaw, containing a rigid horseshoe-shaped frame, consisting of external and internal sides connected to each other, characterized in that the sides of the frame are connected at the ends by jumpers in the form of an arch, provided with openings for the exit of excess impression mass, as well as slots for fixing removable polymer liners located along the upper edges of both sides, the lower edges of the sides made with bevels at the corners at the ends, the frame of the spoon is made of metal, the spoon is equipped with wife with a pen attached to the middle of the outer side. 2. 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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