Preformed tooth space retainer

Abstract

The utility model provides a preforming tooth clearance retainer, including band, connecting piece, nut, connecting rod and arc contact plate, one end of connecting rod is inserted in the connecting piece and then screwed up and fixed through nut, the other end of connecting rod is provided with arc contact plate, one end of connecting piece is fixedly connected to band. According to the utility model, through the belt ring, the connecting piece, the cap, the connecting rod, the arc-shaped contact plate and the like, the connecting rod with a proper length is cut out in vitro according to the length of an interdental space so as to be matched with the size of the interdental space, so that the interdental space can be accurately controlled, and the inclination towards an interdental space is prevented; after the connecting rod is inserted into the bolt way behind the connecting piece, the nut is tightened for fixing, the risk of mistaken swallowing caused by falling of anterior teeth and falling of the connecting rod is prevented, after connection is completed, the whole body is worn into the dental crown without being sent to a factory to be machined and manufactured, on-site manufacturing can be achieved according to the specific conditions of a patient, and the treatment period is shortened; and the cohesive force with teeth is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of oral clinical instruments, in particular to a prefabricated dental space maintainer. Background Art

[0002] A dental space maintainer refers to a device made to maintain the vacancy, keep the normal physiological space, prevent adjacent teeth from inclining towards the lost part and the opposing teeth from overerupting after a child's tooth is prematurely lost. It is used to maintain the mesiodistal and vertical spaces of the prematurely lost tooth in the dental arch and keep the normal eruption of the succedaneous permanent tooth.

[0003] The existing gap maintainer consists of a stainless steel band and a retainer fixedly connected to the band. When the space maintainer needs to be fixed on the abutment teeth of different spaces, due to the non-adjustable length of the space maintainer and the need to send it to a processing factory for production, the flexibility of the space maintainer is poor and the wearing waiting period is long. Summary of the Utility Model

[0004] In view of this, in order to solve the problems of non-adjustable length and long production cycle of the space maintainer in the technical background, the utility model provides a prefabricated dental space maintainer, and the specific technical solutions are as follows:

[0005] A prefabricated dental space maintainer includes a band, a connecting piece, a nut, a connecting rod and an arc contact plate. One end of the connecting rod is inserted into the connecting piece and then tightened and fixed by the nut. The other end of the connecting rod is provided with the arc contact plate, and one end of the connecting piece is fixedly connected to the band.

[0006] Further, the connecting piece is in a frustum shape with a wider left side and a narrower right side, and the outer wall is provided with threads. The part of the connecting piece corresponding to the threads is equidistantly provided with slits around the circumference of the connecting piece. The nut is also in a cylindrical shape with a wider left side and a narrower right side and both ends open, and the inner wall of the nut is provided with internal threads.

[0007] Further, the band and the connecting piece are integrally connected.

[0008] Further, the inner wall of the band matches the shape of the abutment teeth of the teeth sleeved thereon, and the inner wall is a frosted rough surface to increase the friction with the tooth tissue.

[0009] Further, the materials of the band, the connecting piece, the connecting rod and the nut are all one of cobalt-chromium alloy, nickel-chromium alloy or titanium alloy.

[0010] Further, the lower edge of the band is flush with the gingival margin, 1 mm lower than the occlusal surface, with a thickness of 0.5 mm, and the lower edge of the band is flush with the gingival margin and has a thickness of 0.5 mm.

[0011] Adopting the above technical solution, the following beneficial effects are achieved:

[0012] The utility model is composed of a band, a connecting piece, a cap, a connecting rod, an arc-shaped contact plate, etc. According to the length of the tooth gap outside the body, a connecting rod of an appropriate length is intercepted to match the size of the edentulous space, so as to achieve precise control of the gap and prevent tilting towards the toothless area; after inserting the connecting rod into the bolt channel of the connecting piece, the nut is tightened and fixed to prevent the risk of accidental swallowing caused by the falling out of the connecting rod due to the shedding of the front teeth. After the connection is completed, the whole is worn into the dental crown, and there is no need to send it to the factory for processing and production. It can be made on-site according to the specific situation of the patient, shortening the treatment cycle. At the same time, the inner side of the band is a rough frosted surface, which enhances the adhesion to the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a prefabricated tooth space maintainer of the utility model;

[0014] Figure 2 It is a schematic structural diagram of a prefabricated tooth space maintainer in Embodiment 2;

[0015] In the figure: 1 - band; 2 - connecting piece; 3 - nut; 4 - connecting rod; 5 - arc-shaped contact plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Embodiment 1: Refer to Figure 1 A prefabricated tooth space maintainer shown in the figure, including a band 1, a connecting piece 2, a nut 3, a connecting rod 4 and an arc-shaped contact plate 5. One end of the connecting rod 4 is inserted into the connecting piece 2 and tightened and fixed by the nut 3. The other end of the connecting rod 4 is provided with an arc-shaped contact plate 5. One end of the connecting piece 2 is fixedly connected to the band. The connecting piece 2 is a frustum-shaped structure with a wider left side and a narrower right side, and the outer wall is provided with threads. The part of the connecting piece 2 corresponding to the threads is provided with slits at equal distances around the circumference of the connecting piece 2. The nut 3 is also a cylindrical structure with a wider left side and a narrower right side and both ends open, and the inner wall of the nut 3 is provided with internal threads.

[0018] The ring 1 and the connecting piece 2 are integrally connected. The inner wall of the ring matches the shape of the abutment teeth of the teeth sleeved thereon, and the inner wall is a frosted rough surface to increase the friction with the tooth tissue. The materials of the ring 1, the connecting piece 2, the connecting rod 4 and the nut 3 are all one of cobalt-chromium alloy, nickel-chromium alloy or titanium alloy. The lower edge of the ring is at least 1 mm higher than the gingival margin and 1 mm lower than the occlusal surface, and the thickness of the ring is 0.5 mm.

[0019] During specific use, the protruding length of the connecting rod 4 is adjusted according to the length of the tooth gap. After the connecting rod 4 is inserted into the keyway in the connecting piece 2, the nut 3 is tightened for fixation. Since the connecting surfaces of the nut 3 and the connecting rod 4 are both frustum-shaped, when the nut 3 is gradually tightened, the nut 3 gradually moves towards the other end of the connecting piece 2, that is, the wider end, and the gap of the connecting piece 2 gradually shrinks, thereby clamping the connecting rod 4, which is beneficial to accurately maintaining the tooth gap and preventing tilting towards the toothless area.

[0020] In this embodiment, the ring 1 and the connecting piece 2 are integrally connected. The inner wall of the sleeve ring 1 matches the shape of the abutment teeth of the teeth sleeved thereon, and the inner wall of the ring 1 is a frosted rough surface to increase the friction with the tooth tissue. The materials of the ring 1, the connecting piece 2, the connecting rod 4 and the nut 3 are all cobalt-chromium alloy. The lower edge of the ring 1 is flush with the gingival margin, 1 mm lower than the occlusal surface, and the thickness is 0.5 mm. The lower edge of the ring 1 is flush with the gingival margin and the thickness is 0.5 mm. The utility model is made of alloy, and the alloy has high strength and is not easy to deform, which is beneficial to improving the service life of the space maintainer.

[0021] In Embodiment 2, see Figure 2 As shown, the ring 1 can be replaced by an arc-shaped plate with a non-closed structure, and the inner wall of the arc-shaped plate matches the shape of the abutment teeth of the teeth.

[0022] The above describes the basic principles and main features of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A prefabricated tooth space maintainer, characterized in that: The invention comprises a belt ring (1), a connecting piece (2), a nut (3), a connecting rod (4) and an arc-shaped contact plate (5); one end of the connecting rod (4) is inserted into the connecting piece (2) and then tightened and fixed by the nut (3); the other end of the connecting rod (4) is provided with an arc-shaped contact plate (5); and one end of the connecting piece (2) is fixedly connected to the belt ring (1).

2. A prefabricated tooth space maintainer according to claim 1, characterized in that: The connecting piece (2) is a truncated cone-shaped structure that is wider on the left and narrower on the right, and has a thread on the outer wall. The portion of the connecting piece (2) corresponding to the thread has gaps at equal distances around the circumference of the connecting piece (2). The nut (3) is also a truncated cone-shaped structure that is wider on the left and narrower on the right, and has open ends. The inner wall of the nut (3) has an internal thread.

3. The prefabricated tooth space maintainer according to claim 1, characterized in that: The belt ring (1) and the connecting piece (2) are connected as one piece.

4. The prefabricated tooth space maintainer according to claim 1, characterized in that: The inner wall of the band ring (1) matches the shape of the abutment of the tooth to which it is attached, and the inner wall is a frosted rough surface to increase the friction with the tooth tissue.

5. The prefabricated tooth space maintainer according to claim 1, characterized in that: The material of the belt ring (1), the connecting piece (2), the connecting rod (4) and the nut (3) are all one of cobalt-chromium alloy, nickel-chromium alloy or titanium alloy.

6. A prefabricated tooth space maintainer according to any one of claims 1 to 5, characterized in that: The lower edge of the band ring (1) is level with the gingival edge, 1 mm below the occlusal surface, and has a thickness of 0.5 mm. The lower edge of the band ring (1) is level with the gingival edge, and has a thickness of 0.5 mm.

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