CN104840266B - A tray for anti-stripping teeth and a method for making an impression with high precision using the tray - Google Patents

Abstract

A tray for preventing demoulding teeth, relating to a dental medical appliance, comprising a tray body, the tray body is composed of a handle, a tray side wall, a tray groove and a central tongue-shaped plate, and the tray body is provided with an overflow hole, It is characterized in that: the lower part of the tray body is provided with a U-shaped base detachably connected with it to accommodate the impression material overflowing from the overflow hole; the upper part of the tongue-shaped plate of the tray body is provided with a palate stopper ; The rear end of the tongue-shaped plate is provided with a rear side plate perpendicular to it, which is used to install and fix the palate block. The invention has a reasonable structure, and the mold made by the tooth tray has high precision and can prevent deformation and dislocation of the mold.

Description

A tray for anti-stripping teeth and a method for making an impression with high precision using the tray

technical field

The invention relates to a dental medical appliance, in particular to a tray for preventing demoulding teeth and a method for making an impression with high precision using the tray.

Background technique

At present, taking an impression is an essential operation step in the process of oral restoration and orthodontic treatment. It will be used before and after treatment. Orthodontic patients with glued brackets and patients with very irregular tooth arrangement in the mouth are very easy to remove the mold during the process of making the impression. The so-called demoulding means: when the doctor prepares the oral model, he first prepares the impression material, puts it in the tray, and then presses the tray into the upper or lower dentition of the patient. At this time, the excess impression material will be released from the tray. After the printing film material solidifies, the tray will have a certain bonding force with the printing film material. The doctor will take the tray and the printing film material out of the patient’s mouth. At this time, the oral impression is taken. During the process of removing the printing film from the oral cavity, due to the strong negative pressure formed between the printing film, oral soft tissue and oral saliva, as well as the resistance caused by the anatomical structure of the crown itself in the oral cavity, and the doctor’s unsatisfactory demoulding technique Correct, too small or too few overflow holes on the tray, and unreasonable mixing of the printing film material, etc., lead to the phenomenon that the printing film material is partially or even completely separated from the tray when the impression is detached from the oral cavity. If the impression is separated from the tray, the impression will be deformed, and the plaster model filled by the doctor with the deformed impression will be quite different from the real situation of the teeth in the oral cavity. Wearing the restorations and orthodontic devices made on the patient's mouth into the patient's mouth will cause the patient to wear discomfort, the restoration and the tooth will not be tightly bonded and other complications, which will eventually lead to the failure of the restoration and increased complications. The fixed and movable restoration of missing dentition in the oral cavity, and the production of various orthodontic devices are all high-precision restorations. The oral impression made by the doctor must accurately reflect the fine structure of the oral tissue anatomy. Inaccurate extraction will add a lot of difficulties to the subsequent denture production and clinician's try-in of the prosthesis. It is even necessary to re-take the impression, re-make the model, and re-send to the dental laboratory to re-make the restoration, which undoubtedly increases the workload of doctors and technicians and prolongs working hours, and increases the time and psychological burden of patients. Therefore, it is of great clinical significance to design a tray that can prevent this demoulding phenomenon when making the model and ensure that the impression is accurate, stable and stable. At present, there are no similar products.

Contents of the invention

In order to solve the problems existing in the prior art, the object of the present invention is to provide a tray for anti-stripping teeth, and to provide a method for making an impression with high precision using the tray.

The technical scheme that the present invention adopts is as follows:

A tray for anti-demolding teeth, comprising a tray body, the tray body is composed of a handle, a tray side wall, a tray groove and a central tongue-shaped plate, the tray body is provided with an overflow hole, it is characterized in that: the tray The lower part of the body is provided with a U-shaped bottom detachably connected with it to accommodate the impression material overflowing from the overflow hole; the tongue-shaped plate of the tray body is provided with a palate stopper directly above the tongue-shaped plate; the tongue-shaped plate The rear end is provided with a rear side plate perpendicular to it, which is used for installing and fixing the palate stopper.

The above-mentioned tray for anti-demolding teeth is characterized in that: the base is composed of a bottom plate, a retaining wall located on the outer periphery of the bottom plate, and a convex strip located on the inner periphery of the bottom plate; the base is detachably connected to the tray body near the opening end; The handle is provided with a ferrule for fixing the base on the outside of the tray body and matching with the bottom plate retaining wall. The upper and lower pairs of positioning wings of the retaining wall; the outer side of the junction between the bottom plate and the retaining wall is provided with an inwardly recessed groove, which cooperates with the lower positioning wings of the ferrule, that is, the lower positioning wings sink into the In the recessed groove, at this moment, the upper positioning wings block the left and right side retaining walls near the top of the vacancy.

The above-mentioned tray for anti-demolding teeth is characterized in that: the end of the handle of the tray body is provided with a lock that facilitates the removal of the ferrule and prevents the ferrule from slipping out.

The above-mentioned tray for mold-removing teeth is characterized in that: the middle part of the side wall of the tray protrudes outward in an arc shape; the top of the side wall is provided with an inwardly bent curl.

The above-mentioned tray for demoulding-proof teeth is characterized in that: the overflow holes are located on the side walls of the tray and the tray grooves, and there are no overflow holes on the tongue-shaped plate.

The above-mentioned tray for mold release prevention teeth is characterized in that: the diameter of the overflow hole on the inner side of the tray is smaller than the diameter of the outer hole.

The above-mentioned tray for mold-removing teeth is characterized in that: the rear side plate is provided with two pairs of upper and lower through holes for installing the palate stopper.

The above-mentioned tray for demoulding-proof teeth is characterized in that: the palate block is provided with overflow holes.

A method for making an impression with high precision using a tray for anti-stripping teeth, comprising the following steps:

1) Assemble the base on the tray body and fix it with ferrules;

2) According to the height of the patient's palate, insert the palate stopper into the corresponding through hole on the rear side plate;

3) Prepare the impression material, mix it until creamy with a mixing knife, put a small amount of the impression material into the tray, and use the mixing knife to press part of the impression material into the bottom of the tray and the overflow holes on the front and rear side walls to make the impression The film material enters the outside of the overflow hole and between the base to form a plane of the impression material, and then fill the tray with the print film material;

4) Put the tray with printing film into the patient's mouth, and press it into the patient's upper or lower dentition. When pressing, first press the back of the tray into the back dentition, and then slowly press the front of the tray into the dentition. The doctor uses the index fingers of both hands to press the middle of both sides of the base wall to make the tray stable and not shake. After the impression material in the tray is solidified, carefully take out the tray with the patient's tooth impression from the mouth. When taking it out, the doctor holds the front of the tray With the handle, use the tilting power to separate the rear part of the impression tray from the palate of the mouth first, and then remove the impression tray along the direction of the anterior teeth;

5) After the impression is sterilized and dried, the doctor touches one end of the impression to the plaster shaker with one hand, and slowly pours the mixed plaster onto the impression with the other hand until the plaster covers the entire impression. After the plaster solidifies, take out the plaster model , to complete the production of the oral cavity model.

A method for making an impression with high precision using a tray for anti-release teeth, characterized in that the impression material is an alginate impression material.

The invention has a reasonable structure and has the following beneficial effects: 1) A base is added to the tray body, the bottom plate of which covers the bottom of the tray, and the retaining wall on the outer periphery of the bottom plate covers two-thirds of the height of the side wall of the tray. When taking the impression, the impression The material overflows from the overflow hole of the tray to form a certain thickness of resistance impression plane on the outside of the tray and the inside of the bottom plate, providing strong resistance to vertical and lateral displacement and deformation for the process of taking out the impression and filling the impression strength. 2) The side of the tray is designed in a curved shape, and the edge is designed with curling, which changes the vertical plane design of the side of the traditional tray and increases the vertical dislocation force against the impression when it is taken out. 3) The overflow hole of the tray is designed so that the inner diameter of the tray is smaller than the diameter of the outer hole of the tray, so that during the process of taking out the impression, the impression material is prevented from being dislocated from the tray, and the friction and retention force are increased. 4) During the process of taking impressions with ordinary trays, the doctor presses the index fingers of both hands on the middle of both sides of the tray to fix the tray in a stable position. The overflow hole where the index fingers are located cannot discharge the impression material due to the obstruction of the index fingers, so there is no tray The clamping force on the impression material, so the anti-impression dislocation force here is weak. When the impression is taken out, it is very easy to dislocate here, but the doctor's finger retention area of this device is covered by the bottom plate, so it will not affect the discharge of the printing film material in the overflow hole and the impression plane formed, which enhances the stability of the impression here. resistance performance. 5) There is no overflow hole at the welded part of the handle of the traditional tray and the tray body. When the impression is taken out from the mouth or when the impression is filled, the impression material is easily separated from the tray, causing the impression to be deformed. The overflow hole is still designed at the welding point, which increases the anti-dislocation force of the joint. 6) The design of the bottom plate can make the impression material overflowing from the overflow hole of the tray stay on the bottom plate to form a resistance plane, instead of being squeezed and hung down on the patient’s oral mucosa like ordinary trays, Even excess impression material is squeezed to the back of the tray and the patient's velopharynx, aggravating the patient's nausea and vomiting response. 7) A palate stopper is added, which can be inserted into the upper or lower through hole of the rear side plate according to the height of the patient's palate. The palate stopper is provided with an overflow hole, and the printed film material overflowing from the hole enters the hole directly below it. The solid tongue-shaped plate is equivalent to adding a layer of mesh structure to the printing film material, which increases the overall structural strength and has a very good effect on preventing the printing film material from deforming, and also reduces the palate. Risk of impression dislocation in the area. 8) Because the impression material and the tray are strongly bonded, the doctor can pour a plaster model as a backup model after the first plaster is solidified and taken out, especially for patients who have finished orthodontics, and ordinary trays often require two impressions , one pair is used to make the retainer, and the other pair is used to make the memory model. This high-precision mold-proof tray can only take a pair of impressions, so the manpower and material resources are reduced. 9) When the model is poured, it also has a greater advantage in preventing the deformation and dislocation of the impression than the ordinary tray. In a word, the invention realizes all-round mold release prevention, and the device can realize high-precision impression making.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation after each parts assembly of the present invention;

Fig. 3 is a sectional view along A-A in Fig. 2;

Fig. 4 is a structural schematic diagram of the tray body;

Fig. 5 is the structural representation of base;

Fig. 6 is the structural representation of palatal stop piece;

In the figure: 1-tray body; 1-1-handle; 1-2-tray side wall; 1-3-tray groove; 1-4-tongue plate; 1-5-overflow hole; 1-6-back Side plate; 1-7-through hole; 2-base; 2-1-bottom plate; 2-2-block wall;

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The tray designed by the present invention includes a three-layer structure, which is a tray body 1 in the middle layer, a palate stopper 3 located above the tray body 1 and a base 2 located below the tray body 1 . The tray body 1 is improved on the basis of the prior art, and includes: a handle 1-1; a tray side wall 1-2; a tray groove 1-3; a tongue-shaped plate 1-4. It is different from the prior art in that the middle part of the tray body is designed as a solid plate, that is, the tongue-shaped plate 1-4, and no overflow hole is provided on it; in addition, the middle part of the tray side wall 1-2 protrudes outwards to form Curved, the top edge of the side wall 1-2 of the tray is designed with inward curling, which changes the vertical plane design of the side of the traditional tray and increases the vertical dislocation force against the impression when it is taken out. In addition, the shape of the overflow holes 1-5 is different from that of the prior art. The overflow holes involved in the present invention all have a smaller diameter on the inside of the tray than on the outside, and are in the shape of a bell mouth. The impression material is dislocated from the tray to increase the frictional force and retention force; of course, for better retention effect, the overflow holes 1-5 can be designed as long strips. The handle 1-1 designed in the present invention is fixedly connected to the rear of the tray body 1, and is located on the same plane as the tray groove 1-3, instead of being located below the tray groove 1-3, which is where the handle and the tray are connected in the prior art The overflow hole 1-5 has also been set up at the position, which overcomes the technical defect that there is no overflow hole 1-5 here in the prior art and causes this place to be easily demoulded.

In order to fix the palate block 3 directly above the tongue-shaped plate 1-4, a rear side plate 1-6 perpendicular to the tray body 1 is provided at the rear end of the tray body 1, and a through hole 1-6 is provided on the rear side plate. 7. The through hole is divided into upper and lower layers. The palate block 3 is also provided with an overflow hole of the same shape as that on the tray body 1. The rear end of the palate block 3 is provided with two holes that match the through holes 1-7. Protrusion, according to the height of different people's palate, choose to insert the protrusion into the upper through hole or the lower through hole, that is, the one with the higher palate is inserted into the upper hole.

The base 2 designed in the present invention is composed of a base plate 2-1, a retaining wall 2-2 located on the outer periphery of the base plate, and a convex strip 2-3 located on the inner circumference of the base plate; the base 2 is detachably connected to the tray body 1 near the open end; the tray The handle 1-1 of the body is provided with a ferrule 4 for fixing the base 2 on the outside of the tray body and matching with the bottom wall 2-2. The ferrule 4 can slide on the handle 1-1; the ferrule 4 has The sleeve is socketed outside the handle 1-1, and the sleeve is respectively provided with two pairs of upper and lower positioning wings for clamping the base plate retaining wall 2-2; the rear of the base plate 2-1 meets the retaining wall 2-2 There is an inwardly recessed groove on the outer side of the ferrule, which cooperates with the lower positioning wing of the ferrule 4, that is, after the assembly, the lower positioning wing sinks into the concave groove, and at this time, the upper positioning wing blocks the left and right side retaining walls 2 respectively. -2 is close to the top of the vacant part, the ferrule 4 wall and the retaining wall 2-2 cooperate at the gap, the two wall thicknesses are the same, the retaining wall 2-2 is connected with the positioning wing to form a whole, and surrounds the outside of the tray side wall.

In order to facilitate the assembly and disassembly of the ferrule 4, the present invention is provided with a lock 5 at the end of the handle 1-1 of the tray body. The lock 5 is an elastic structure and can move outward or inward of the handle. , can slide on the handle between the lock 5 and the tray body 1 .

The above-mentioned device can be used to make an impression with high precision. The specific method is as follows: when taking the impression, first check whether the tray bottom plate is well retained with the main tray, check whether the sliding clips are firmly combined with the tray bottom plates on both sides, and then adjust the impression materials, the device is especially suitable for dental alginate impression materials. Weigh alginate impression material water according to a certain powder-water ratio, add it to a rubber bowl, and use a spatula to blend until creamy, put a small amount of the impression material into the tray, and press the impression material part with a spatula Insert the overflow hole on the bottom of the tray and the front and rear side walls, so that the printed film material forms a plane of the impression material between the outside of the overflow hole and the bottom plate, and then fill the tray with the printed film material. Put the tray with printing film material into the patient's mouth, and press it into the patient's upper or lower dentition. When pressing, first press the back of the tray into the back dentition, and then slowly press the front of the tray into the dentition. At this time The excess printing film material is pressed into the front of the tray from the rear of the tray, and overflows from the upper third of the two side walls of the tray, and part of the printing film material continues to be discharged from the overflow hole outside the overflow hole and the base under pressure. The impression material plane is formed between them, instead of overflowing from the overflow hole and the back of the tray like ordinary trays, the printing film will adhere to the soft tissues of the oral cavity after flowing out from the overflow hole, which is easy to cause patient Discomfort such as nausea and foreign bodies, the printing film overflowing from the palate will adhere to the soft palate area, and even enter the throat to quickly cause the patient's nausea and vomiting reaction. Due to the large overflow hole of the tray, the device is designed with a rear side plate at the rear of the tray, and the rear of the tray is pressed into the dentition first when taking the mold, which can greatly reduce the overflow of the printed film material to the soft tissues of the oral cavity, thus greatly Reduce nausea and other discomfort in patients. The doctor uses the index fingers of both hands to press the middle of the two sides of the base wall to stabilize the tray in one position, wait for the impression material in the tray to solidify, and carefully take out the tray with the patient’s tooth impression from the mouth. When taking it out, the doctor holds the tray before The handle at the top of the impression tray, using the tilting power, let the back of the impression tray separate from the palate of the mouth first, because the tooth resistance in this area is the least, and it is easy to use a relatively small force to destroy the negative pressure between the impression tray and the oral tissue, and the back of the tray The palatal baffle at the top greatly strengthens the vertical anti-dislocation force of the impression in this area, ensuring that the impression material and the tray are not separated after the force is applied, and then the impression tray is removed along the direction of the anterior teeth. After the impression is sterilized and dried, the doctor touches one end of the impression to the plaster shaker with one hand, and slowly pours the mixed plaster onto the impression with the other hand until the plaster covers the entire impression. After the plaster solidifies, take out the plaster model and complete Production of oral models. In the process of filling the mold with gypsum, in order to prevent the formation of model steam drums, a gypsum shaker is needed, but due to the high-frequency vibration of the gypsum shaker, it is easy to cause the impression to be separated from the tray during the mold filling process, but the device of the present invention It can keep the impression and the tray tightly combined even under the high-frequency vibration force. When taking impressions of orthodontic patients with brackets glued to the labial side or lingual side of the upper and lower jaw dentition, due to the great resistance generated by orthodontic accessories such as orthodontic brackets when the impression is detached from the oral cavity, the teeth of malocclusion patients Due to the unevenness of the inside and outside of the crown itself and the anatomical characteristics of the large crown and small neck of the crown itself, as well as the strong negative pressure formed between the impression, oral tissue and saliva, the impression is very easy to remove during the process of taking the impression out of the oral tissue. Separated from the tray, the trumpet-shaped special design of the overflow hole of the tray, and the unique curved design of the cheek side of the tray, etc. all increase the strength against the separation of the impression from the tray. The bottom plate covers the bottom of the tray and the height of the edges on both sides of the tray. The two-thirds of the design makes the impression material form a resistant impression plane on the inner side of the outer bottom plate of the tray, providing strong resistance to displacement and deformation for the process of taking out the impression and filling the impression.

Claims (10)

1. an anti-demoulding tooth pallet, comprise tray body (1), described tray body (1) is by handle (1-1), pallet side wall (1-2), tongue template (1-4) composition of tray slot (1-3) and central authorities, tray body (1) is provided with overflowing hole (1-5), it is characterized in that: the below of described tray body (1) is provided with the U-shaped base (2) for hold the modeling composition that from overflowing hole (1-5) overflow that be connected detachable with it; Palate catch (3) is provided with directly over described tray body tongue template (1-4); The rear end of described tongue template (1-4) is provided with perpendicular back side panel (1-6), for installing and fixing palate catch (3).

2. one according to claim 1 anti-demoulding tooth pallet, is characterized in that: described base (2) is made up of base plate (2-1), the retaining wall (2-2) being positioned at base plate periphery and the raised line (2-3) that is positioned at base plate inner circumferential; Base (2) is connected with tray body (1) near opening is detachable; Described handle (1-1) is provided with for being fixed on by base (2) outside tray body and the cutting ferrule (4) matched with base plate retaining wall (2-2), described cutting ferrule (4) is provided with and is socketed in handle (1-1) sleeve outward, sleeve is respectively equipped with the upper and lower two pairs of location wings for blocking base plate retaining wall (2-2); The outside of described base plate (2-1) rear and retaining wall (2-2) joint is provided with the groove caved inward, this groove coordinates with the lower location wing of cutting ferrule (4), namely assembling rear lower location wing is absorbed in the groove of depression, now goes up location wing and blocks the top of left and right side retaining wall (2-2) near vacancy position respectively.

3. one according to claim 1 anti-demoulding tooth pallet, is characterized in that: handle (1-1) end of described tray body is provided with and facilitates cutting ferrule (4) to dismantle and the snap close (5) preventing cutting ferrule (4) from skidding off.

4. one according to claim 1 anti-demoulding tooth pallet, is characterized in that: the middle part of described pallet side wall (1-2) is outwardly curved; The top of sidewall (1-2) is provided with aduncate crimping.

5. one according to claim 1 anti-demoulding tooth pallet, is characterized in that: described overflowing hole (1-5) is positioned on pallet side wall (1-2) and tray slot (1-3), tongue template (1-4) is not established overflowing hole (1-5).

6. a kind of anti-demoulding tooth pallet according to claim 1 or 5, is characterized in that: described overflowing hole (1-5) aperture be positioned at inside pallet is less than the aperture in outside.

7. one according to claim 1 anti-demoulding tooth pallet, is characterized in that: described back side panel (1-6) is provided with upper and lower two to the through hole (1-7) for installing palate catch (3).

8. one according to claim 1 anti-demoulding tooth pallet, is characterized in that: described palate catch (3) is provided with overflowing hole.

9. utilize any one anti-demoulding tooth pallet high accuracy in claim 1-8 to produce a method for die, comprise the steps:

1) base is assemblied in tray body, and is fixed with cutting ferrule;

2) according to the height of patient's palatine, in the through hole that palate catch insertion back side panel is adapted;

3) modeling composition is modulated, mix cutter with tune to be in harmonious proportion to butyrous, modeling composition is put into pallet on a small quantity, and mix with adjusting the overflowing hole that modeling composition part to be pressed into tray bottom and front-rear side walls by cutter, die material is entered outside overflowing hole and between base and forms modeling composition plane, then die material is piled pallet;

4) pallet that die material is housed is put into patient oral cavity, and be pressed into the upper of patient or mandibular dentition, denture after the press-in of first pallet rear portion during press-in, slow in pallet front portion press-in denture again, doctor with the hands forefinger pins the middle part of base retaining wall both sides, pallet is not firmly rocked, after modeling composition in waiting tray solidifies, the pallet of subsidiary patient teeth's die is carefully taken out in mouth, the hand-held pallet of doctor anterior handle during taking-up, utilize tilting power, allow impression tray rear portion first depart from oral cavity palatine, and then take off impression tray along labial teeth direction;

5) die is after sterilization dries up, and doctor is on the other hand by die end thereof contacts Gypsum Fibrosum oscillator, and another hands is slowly filled into adjusting the Gypsum Fibrosum mixed on die, until Gypsum Fibrosum covers whole die, after gypsum sets, takes out plaster model, completes the making of oral cavity model.

10. according to claim 9ly a kind ofly utilize anti-demoulding tooth pallet high accuracy to produce the method for die, it is characterized in that described die material is alginic acid salt modeling composition.