CN111888017A - A digitally designed full casting type gap retainer and its manufacturing method - Google Patents

Abstract

The invention discloses a digitally designed full casting type clearance retainer and a manufacturing method thereof. The digitally designed full casting type clearance retainer comprises a belt ring, a support bar and a support head, an inner ring with a ring and a prepared base The tooth shape matches, the support head is an oblong curved metal plate, the inner side of the curved surface of the support head matches the shape of the support tooth on the side of the gap, the belt ring and the support head are connected by a support bar, and the support bar is parallel to the Arranged in the direction of the dental arch. The invention saves the steps of trying on the ring and taking the impression in the mouth, reduces the discomfort of the child, simplifies the clinical operation, is beneficial to improve the cooperation degree of the child, and improves the clinical operation efficiency. The shape of the investment model made by digital design and 3D printing technology completely fits the shape of the teeth on both sides of the gap, which is conducive to the accurate maintenance of the gap between the missing teeth. Because the alloy is integrally cast, the alloy has high strength and is not easy to deform, which is beneficial to improve the life of the gap retainer and reduce the failure of gap maintenance caused by the deformation of the belt ring.

Description

A digitally designed full casting type gap retainer and its manufacturing method

technical field

The invention relates to the field of oral clinical instruments for oral children, in particular to a digitally designed full casting type gap retainer and a manufacturing method thereof.

Background technique

During the growth and development of children, due to severe caries, periapical periodontitis, abnormal eruption, congenital deletion or trauma, etc., deciduous teeth often lead to premature loss or extraction. When the deciduous teeth are lost prematurely and the permanent teeth cannot erupt spontaneously in a short period of time, if the gap is not maintained, the bilateral adjacent teeth will be inclined and displaced to the side of the gap, making the gap between the missing teeth smaller, and then the eruption of permanent teeth will be blocked or abnormal. Bit eruption, and even lead to jaw deformity. Therefore, measures need to be taken to maintain the edentulous space for a long time until new permanent teeth erupt. The most widely used method of maintaining gaps is to wear a gap maintainer.

At present, the most commonly used gap retainer is the ring-shaped gap retainer, which is welded with pre-formed band rings and bent steel wires. The manufacturing steps of the ring-and-loop gap keeper are complicated, including testing the ring, taking an impression, making a plaster model, and completing the design and manufacture of the gap keeper on the plaster model. Among them, the test strip ring and the mold taking are all performed in the mouth of the child, which often causes discomfort to the child. Some children may experience nausea and vomiting or even resist treatment, which increases the difficulty of clinical operation. The alginate material used to make impressions has limited accuracy and is prone to deformation, which can lead to a reduction in the accuracy of the plaster cast. The gap maintainer manufactured by using inaccurate plaster models has poor matching with the oral anatomy of the child, and cannot accurately maintain the gap between the missing teeth. Sometimes it is difficult to insert it, and it needs to be adjusted repeatedly before it can be inserted, which reduces the efficiency of clinical operation. In addition, the shape of the pre-formed belt ring and the abutment cannot be completely matched and easily deformed. During use, the gums may be compressed to cause gingival inflammation, the gap between the belt ring and the abutment tooth is too large, which may lead to the failure of bonding, and the deformation of the belt ring may cause the gap. Keep failing etc. The welding part of the steel wire and the belt ring may also have false welding or poor welding, which will cause the steel wire to fall off, affect the preservation of the gap, and even cause the falling steel wire to enter the digestive tract or respiratory tract. The bent steel wire is mostly in line contact with the adjacent teeth, which is prone to displacement, which is not conducive to the accurate maintenance of the gap between the missing teeth.

The gap maintainer worn in the oral cavity will be subjected to repeated forces in multiple directions from the tongue, the bite force, the buccal muscle and the movement of the teeth themselves during the bite process, and the gap maintainer usually needs to use a More than a year, some gap maintainers may need to be used for more than 5 years. However, traditional gap keepers mostly use welding technology to connect different components, and the welding parts may be de-soldered under repeated complex stress, resulting in the failure of gap maintenance. Therefore, there is an urgent need for a new space retainer, which has the advantages of relatively simple clinical operation, less deformation and damage to the retaining device, conforming to the shape of the tooth, less irritation to the gingival tissue, and stable contact with the adjacent tooth surface.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a simple structure, comfortable to wear, not easy to be deformed and damaged, and easy to operate in clinical practice. The digital design of a full-cast gap retainer and a manufacturing method thereof are provided to solve the problems raised in the above-mentioned background art.

To achieve the above object, the present invention provides the following technical solutions:

A digitally designed all-casting gap retainer comprises a belt ring, a support bar and a support head, the inner ring of the belt ring matches the shape of the prepared abutment, and the support head is an oblong curved metal plate, The inner side of the curved surface of the support head matches the shape of the support teeth on the side of the gap, and the belt ring and the support head are connected by a support bar.

Preferably, the materials of the belt ring, the support bar and the support head are all cobalt-chromium alloys, nickel-chromium alloys or titanium alloys.

Preferably, the belt ring, the support bar and the support head are integrally cast and integrally formed structures.

Preferably, the lower edge of the belt ring is at least 1 mm higher than the gingival margin and 1 mm lower than the occlusal surface, and the thickness of the belt ring is 0.5 mm.

Preferably, the support bars are two metal bars parallel to the dental arch of the edentulous area, the cross section of which is a circle with a diameter of 1.5mm, and the thickness of the support bars is 0.5mm.

Preferably, the support head is an oblong curved metal plate with a thickness of 0.5 mm.

Preferably, the upper boundary of the support head is located in the middle section of the supporting tooth surface, the upper boundary is at least 1 mm below the occlusal surface, and the lower boundary is at least 1 mm above the gum, and the support head extends to the buccal and lingual sides of the teeth, crossing the buccal and lingual sides of the teeth. Side shaft angle 1mm.

The manufacturing method of the digitally designed casting type gap retainer includes the following steps:

1) Collect the internal information of children's oral cavity through intraoral scanner;

2) Import the scanned information into the computer to form the corresponding three-dimensional oral model;

3) Complete the design of the gap retainer casting investment on the three-dimensional oral model;

4) Use a 3D printer to print out the casting resin investment of the gap retainer;

5) The casting resin investment is subjected to conventional embedding casting.

Preferably, the step 1) adopts digital impression technology, the specific steps of which are to use the intraoral scanning head of the Ruike CS3600 model to extend into the mouth of the child, to scan the mouth of the child evenly, and to generate an accurate image of the inside of the child's oral cavity in a computer. Model data information.

Preferably, the step 2) and step 3) adopt digital design technology, the specific steps of which are to import the scan information into the computer, use Geomagicsudio12.0 software to draw a three-dimensional digital model, and design the gap retainer investment mold on the three-dimensional digital model. design.

Preferably, the step 4) adopts 3D printing technology, and its specific steps are importing the designed investment data into the Solidscape 3D printer, and directly printing the casting resin investment through the 3D printing technology.

Compared with the prior art, the beneficial effects of the present invention are:

In the process of design and manufacture, the present invention simultaneously uses three digital technologies and integral casting technologies such as digital impression, digital design and 3D printing, omits the steps of trying on the ring and taking the impression in the mouth, reduces the discomfort of children, and simplifies It is beneficial to improve the cooperation of children and improve the efficiency of clinical operation. The shape of the investment model made by digital design and 3D printing technology completely fits the shape of the teeth on both sides of the gap, which is conducive to the accurate maintenance of the gap between the missing teeth. Because the alloy is integrally cast, the alloy has high strength and is not easy to deform, which is beneficial to improve the life of the gap retainer and reduce the failure of gap maintenance caused by the deformation of the belt ring.

Description of drawings

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

Fig. 2 is the top view of the present invention;

Fig. 3 is the left side view of the present invention;

Fig. 4 is the schematic flow chart of the production method of the present invention;

In the picture: 1-band ring; 2-support bar; 3-support head.

Detailed ways

The technical solution of the present patent will be described in further detail below in conjunction with specific embodiments.

Please refer to Figures 1-4, a digitally designed all-cast gap retainer, including a belt ring 1, a support bar 2 and a support head 3, the inner ring of the belt ring 1 matches the shape of the prepared abutment, and the support The head 3 is an oblong curved metal plate. The inner side of the curved surface of the support head 3 matches the shape of the support teeth on the gap side. The belt ring 1 and the support head 3 are connected by a support bar 2 .

The belt ring 1 , the support bar 2 and the support head 3 are all made of cobalt-chromium alloy, nickel-chromium alloy or titanium alloy, and the belt ring 1 , the support bar 2 and the support head 3 are integrally cast and integrally formed. The lower edge of the belt ring 1 is at least 1 mm higher than the gingival margin and 1 mm lower than the occlusal surface. The thickness of the belt ring 1 is 0.5 mm. The support bars 2 are two metal bars parallel to the dental arch of the edentulous area, the cross section of which is a circle with a diameter of 1.5 mm, and the thickness of the support bars 2 is 0.5 mm. The support head 3 is an oblong curved metal plate with a thickness of 0.5 mm. The upper boundary of the support head 3 is located in the middle section of the lateral surface of the supporting tooth, the upper boundary is at least 1mm below the occlusal surface, and the lower boundary is at least 1mm above the gum. Axle angle 1mm.

The manufacturing method of the digitally designed casting type gap retainer includes the following steps:

1) Collect the internal information of children's oral cavity through intraoral scanner;

2) Import the scanned information into the computer to form the corresponding three-dimensional oral model;

3) Complete the design of the gap retainer casting investment on the three-dimensional oral model;

4) Use a 3D printer to print out the casting resin investment of the gap retainer;

5) The casting resin investment is subjected to conventional embedding casting.

The step 1) adopts digital impression technology, and its specific steps are to use the intraoral scanning head of the Ruike CS3600 model to extend into the mouth of the child, to scan the child's oral cavity evenly, and to generate accurate model data information inside the child's oral cavity in the computer. . Described step 2) and step 3) adopt digital design technology, and its specific steps are to import the scanning information into the computer, use Geomagicsudio12.0 software to draw the three-dimensional digital model, and design the design of the gap retainer investment mold on the three-dimensional digital model. The step 4) adopts 3D printing technology, and the specific steps are importing the designed investment data into the Solidscape 3D printer, and directly printing the casting resin investment through the 3D printing technology.

Example 1

The manufacturing method of the digitally designed casting type gap retainer includes the following steps:

1) Collect the internal information of the child's oral cavity through the intraoral scanner, use the intraoral scanner of Ruike CS3600 to perform intraoral scanning, and evenly scan the dentition, dental arch and mucous membrane in the mouth of the child, and record the scanning results in the computer. The intraoral scanner can quickly and accurately obtain the model data information inside the mouth of children, avoiding the nausea and discomfort caused by traditional impression cream;

2) Import the scanned information into the computer to form the corresponding digital 3D oral model, and use the Geomagicsudio12.0 software to complete the design of the investment mold of the gap retainer on the 3D oral model; the types of gap retainers that can be designed on the 3D oral model include belt rings /Full crown wire ring gap retainer, tongue/jaw bow gap retainer and some individually designed metal casting gap retainers;

3) After the design is completed, use the Solidscape 3D printer to directly print the designed gap retainer casting resin investment;

4) The printed resin casting investment mold is embedded and cast, and the alloy used for casting is cobalt-chromium alloy;

5. Clinically try on the gap retainer, and the child can wear it and leave after trying on the appropriate cement.

Compared with the traditional gap maintainer, the present invention simplifies the clinical operation, avoids discomfort during the process of making the impression and the try-on ring, and reduces the requirements for the cooperation of children. After curing, the patient can wear it and leave. It is beneficial to improve the efficiency of clinical diagnosis and treatment. In addition, the present invention has a simple and comfortable structure, the material is sturdy and not easily deformed and damaged, and has a higher degree of matching with the anatomical structures of the teeth on both sides of the missing tooth space, and can fully fit with the teeth on both sides of the missing tooth space in children, which is conducive to extending the gap retainer. Longevity and precise maintenance of missing teeth.

Claims (10)

1. A digitally designed all-casting type gap retainer, characterized in that it comprises a belt ring (1), a support bar (2) and a support head (3), the inner ring of the belt ring (1) and the prepared The shape of the abutment is matched, the support head (3) is an oblong curved metal plate, the inner side of the curved surface of the support head (3) is matched with the shape of the support tooth on the side of the gap, and the belt ring (1) is connected to the support The heads (3) are connected through a support bar (2). 2. The digitally designed full-casting type gap retainer according to claim 1, wherein the belt ring (1), the support bar (2) and the support head (3) are made of cobalt-chromium alloy, nickel Chrome or Titanium. 3. The digitally designed all-casting type gap retainer according to claim 1 or 2, characterized in that, the belt ring (1), the support bar (2) and the support head (3) are integrally cast and integrally formed structures. 4. The digitally designed full casting gap retainer according to claim 1 or 2, wherein the lower edge of the belt ring (1) is at least 1 mm higher than the gingival margin and 1 mm lower than the occlusal surface, and the belt ring ( 1) The thickness is 0.5mm. 5. The digitally designed full-casting gap maintainer according to claim 1 or 2, characterized in that, the support bars (2) are two metal bars parallel to the dental arch of the edentulous area, and the cross-section is the diameter of the It is a circle of 1.5mm, and the thickness of the support bar (2) is 0.5mm. 6. The digitally designed full-casting type gap retainer according to claim 1 or 2, wherein the support head (3) is an oblong curved metal plate with a thickness of 0.5 mm, and the support head ( 3) The upper boundary is located at the mid-section of the supporting tooth, the upper boundary is at least 1 mm below the occlusal surface, and the lower boundary is at least 1 mm above the gingiva. The support head (3) extends to the buccal and lingual sides of the teeth and crosses the buccal and lingual axes Angle 1mm. 7. A manufacturing method of digital design casting type gap retainer as claimed in claim 1 or 2, characterized in that, comprising the following steps: 1) Collect the internal information of children's oral cavity through intraoral scanner; 2) Import the scanned information into the computer to form the corresponding three-dimensional oral model; 3) Complete the design of the gap retainer casting investment on the three-dimensional oral model; 4) Use a 3D printer to print out the casting resin investment of the gap retainer; 5) The casting resin investment is subjected to conventional embedding casting. 8. The manufacturing method of digital design casting type gap retainer according to claim 7, it is characterized in that, described step 1) adopts digital impression technique, and its concrete step is to use the intraoral scanning head of Ruike CS3600 model to extend into 8. In the mouth of the child, the child's oral cavity is scanned uniformly, and the accurate model data information of the child's oral cavity is generated in the computer. 9. the manufacture method of digital design casting type gap retainer according to claim 7, is characterized in that, described step 2) and step 3) adopt digital design technology, and its concrete steps are to import scanning information into computer, use Geomagicsudio12.0 software draws a 3D digital model, and designs the investment mold of the gap retainer on the 3D digital model. 10. The manufacturing method of digital design casting type gap retainer according to claim 7, is characterized in that, described step 4) adopts 3D printing technology, and its concrete steps are to import the designed investment data into Solidscape3D printer, Cast resin investment models are directly printed by 3D printing technology.

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