CN111938848B - Air gun mould taking method without gum line removal - Google Patents
Air gun mould taking method without gum line removal Download PDFInfo
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- CN111938848B CN111938848B CN202010868141.0A CN202010868141A CN111938848B CN 111938848 B CN111938848 B CN 111938848B CN 202010868141 A CN202010868141 A CN 202010868141A CN 111938848 B CN111938848 B CN 111938848B
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- impression
- air gun
- silica gel
- neck
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/0006—Impression trays
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/0026—Syringes or guns for injecting impression material; Mixing impression material for immediate use
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/0033—Gingival retraction appliances
Abstract
The invention discloses a gum line expelling-free air gun mould taking method, which comprises the following steps: obtaining a primary impression; trimming the initial impression to reserve a detailed impression material space; exposing the dentition working area needing fine model extraction; separating free gingiva of neck tissue of a tooth body by using an air gun, and injecting light silica gel into a separation gap; a final impression is taken. According to the invention, after the initial impression is obtained, the free gum at the neck of the tooth body is separated through the air gun, and the light silica gel is injected into the separation gap, so that the clear impressions at the neck and the shoulder edges of the tooth body are obtained, the clinical data are accurately provided for a laboratory, and the possibility is provided for manufacturing a closed prosthesis; meanwhile, the gum tissue can not be wounded and secondary gum recession can not be caused, and better aesthetic repairing effect can be obtained.
Description
Technical Field
The invention relates to the technical field of dental restoration, in particular to a gingival retraction-free air gun mould taking method.
Background
In the clinical practice of fixing restorations, in particular in the aesthetic restoration of anterior teeth, the taking of impressions is one of the very important steps, which is the link between the clinic and the laboratory. A clear and complete impression makes it possible to cast a clear model, providing the possibility for the technician to make an accurate restoration.
The difficulty in clinical taking of impressions is obtaining a morphology of the neck and shoulder margins of the tooth located at or below the gingival margin. Previous studies have demonstrated that the gingival sulcus has a depth of 0.5-2 mm. The periodontal probing strength is preferably 20-25g, otherwise the combined epithelium at the base of gingival sulcus is easily damaged, and bleeding and secondary inflammation are caused.
The currently used mode is to push and press 1 or 2 layers of retraction cord into the gingival sulcus without going above the gingival margin. After 3-5 minutes of mechanical compression, the gingival retraction cord was removed and an impression was immediately taken. The problem with this approach is that the sulcus depth is not uniform from tooth position to tooth position in the same person, and it is desirable to probe the sulcus depth to select different types of retraction cords before retraction. With each additional operation, the risk of disrupting the bound epithelium increases. When the gum line is pushed and pressed, the force is not easy to control, especially when the gingival sulcus is shallow and the gingival margin tissue is tight, the operation is more difficult, the combined epithelium is very easy to damage to cause bleeding, and then the light silica gel is influenced to enter the gingival sulcus, and the impression with complete and clear edges can not be obtained.
The damage of the combined epithelium can cause secondary gingivitis to cause retraction of the gingival margin, so that the relative position of the edge of the restoration and the gingival margin is changed, the edge of the restoration is exposed, and the expected aesthetic restoration effect cannot be achieved.
In view of the above, there is a need for an improvement of existing model extraction methods to achieve individualized retraction of the gingiva for different depths of the gingival sulcus while avoiding damage to the combined epithelium.
Disclosure of Invention
The invention aims to solve the technical problems that the existing impression method for pre-burying the gingival retraction cord has low individuation degree, is difficult to operate and is easy to damage a combined epithelial structure.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an air gun mould-taking method without a gingival retraction line comprises the following steps;
obtaining a primary impression;
trimming the initial impression to reserve a detailed impression material space;
exposing the dentition working area needing fine model extraction;
separating free gingiva of neck tissue of a tooth body by using an air gun, and injecting light silica gel into a separation gap;
a final impression is taken.
In this embodiment, trimming the preliminary impression comprises the following steps:
and (3) trimming the primary impression by using a silica gel knife, and uniformly removing the silica gel impression material on the whole tissue surface.
In the scheme, the thickness of the removed silica gel impression material is 0.5-1 mm.
In the scheme, the separation of the free gingiva of the neck tissue of the tooth body by using the air gun and the injection of the light silica gel into the separation gap comprises the following steps:
holding an air gun and a light silica gel injection gun at the same time, starting from one side edge of a dentition working area, enabling the air flow of the air gun to continuously act on the tooth surface of the neck of the tooth body, separating the free gingiva adhered to the neck of the tooth body, and injecting light silica gel into a separation gap;
and simultaneously moving the light silica gel injection gun and the air gun in sequence, and repeating the steps until the dentition working area is completely covered.
In the scheme, the air gun and the lip surface of the tooth of the patient form an angle of 30-45 degrees, and the tail end of the air gun is 3-4cm away from the gingival margin.
In the scheme, the air pressure of the air gun is 2-4 bar.
In this embodiment, the step of obtaining the preliminary impression comprises the following steps:
adjusting the body position of the patient;
selecting a tray suitable for the oral cavity of a patient, and smearing heavy silica gel on the tray;
placed in the patient's mouth and a primary impression taken.
In this aspect, exposing the dentition work area comprises the steps of:
the double-side mouth gag is used for exposing the dentition working area needing fine sampling.
In this aspect, the obtaining the final impression comprises the steps of:
injecting light silica gel into the tissue surface of the primary impression;
removing the double-side mouth gag;
the final impression is taken by placing the initial impression into the mouth of the patient.
Compared with the prior art, the air gun model taking method without the gingival retraction cord provided by the invention has the advantages that after the initial impression is obtained, the free gingiva at the neck of the tooth body is separated through the air gun, and the light silica gel is injected into the separation gap, so that the clear impressions at the neck and the shoulder edge of the tooth body are obtained, the clinical data are accurately provided for a laboratory, and the possibility is provided for manufacturing a closed restoration body; meanwhile, the gum tissue can not be wounded and secondary gum recession can not be caused, and better aesthetic repairing effect can be obtained.
Drawings
FIG. 1 is a flow chart of an air gun mold extraction method of the present invention;
FIG. 2 is a schematic view showing the relationship between the gum and the tooth tissue under normal conditions;
FIG. 3 is a schematic representation of the neck tissue and shoulder margins of a tooth for separating free gingiva using an air gun in the present invention;
FIG. 4 is a schematic view of injecting light silica gel in the present invention.
Detailed Description
The invention provides an air gun model taking method without a gum line, which separates free gum at the neck of a tooth body through an air gun and injects light silica gel into a separation gap to obtain a clear impression at the neck and shoulder edges of the tooth body, thereby improving the accuracy of impression data and avoiding the injury of gum tissues. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in figure 1, the gingival retraction-free air gun model taking method provided by the invention comprises the following steps:
s1, obtaining a primary impression;
specifically, the method comprises the following steps:
adjusting the body position of the patient;
selecting a tray suitable for the oral cavity of a patient, and smearing heavy silica gel on the tray;
placed in the patient's mouth and a primary impression taken.
S2, trimming the initial impression to reserve a detailed impression material space;
specifically, a silica gel knife is used for trimming the primary impression, and the whole tissue surface is uniformly subjected to silica gel impression material removal treatment. Wherein the thickness of the removed silica gel impression material is 0.5-1 mm.
S3, exposing the dentition working area needing fine model extraction;
specifically, a bilateral mouth gag is used to expose the dentition working area where a fine cast is required.
S4, separating free gingiva on the neck tissue of the tooth body by using an air gun, and injecting light silica gel into the separation gap;
specifically, the method comprises the following steps:
holding an air gun 3 and a light silica gel injection gun 4 at the same time, starting from one side edge of a dentition working area, enabling the tail end of air flow to reach the position of a tooth body above a gingival margin 1, enabling the air flow of the air gun 3 to continuously act on the tooth surface of the neck of the tooth body, separating a free gum adhered to the neck of the tooth body, and simultaneously injecting light silica gel into a separation gap; wherein the air gun 3 and the labial surface 2 of the tooth body form an angle of 30-45 degrees, the distance between the tail end of the air gun 3 and the gingival margin 1 is 3-4cm, and the air pressure of the air gun 3 is 2-4 bar.
And simultaneously moving the light silica gel injection gun 4 and the air gun 3 in sequence, and repeating the steps until the dentition working area is completely covered.
Fig. 2 shows the positional relationship between the gum and the dental tissue in the normal state, as shown in fig. 3 and 4, when the air gun 3 is used to act on the tooth surface of the neck tissue of the dental body, the free gum adhered to the neck tissue of the dental body can be pushed away, the neck and shoulder edges of the dental body are exposed, a separation gap is formed before the free gum and the tooth surface, and then the light silica gel is injected into the separation gap by using the light silica gel injection gun 4, so that the clear impression of the neck and shoulder edges of the dental body can be obtained, and accurate impression data can be obtained.
S5, obtaining the final impression.
Specifically, the method comprises the following steps:
injecting light silica gel into the tissue surface of the primary impression;
removing the double-side mouth gag;
the final impression is taken by placing the initial impression into the mouth of the patient.
Compared with the prior art, the air gun model taking method without the gingival retraction cord provided by the invention has the advantages that after the initial impression is obtained, the free gingiva at the neck of the tooth body is separated through the air gun, and the light silica gel is injected into the separation gap, so that the clear impressions at the neck and the shoulder edge of the tooth body are obtained, the clinical data are accurately provided for a laboratory, and the possibility is provided for manufacturing a closed restoration body; meanwhile, the gum tissue can not be wounded and the secondary gum recession can not be caused. The air gun model taking method without using the gingival retraction cord does not need to probe the gingival sulcus bottom, has simple operation, does not damage the physiological structure combined with the epithelium, achieves personalized gingival retraction aiming at gingival sulcus with different depths, well maintains the health and the position stability of the gingiva, is beneficial to improving the tightness of the edge of an aesthetic restoration body, and improves the aesthetic effect and the stability of the long-term restoration effect.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (8)
1. An air gun mould taking method without a gingival retraction line is characterized by comprising the following steps:
obtaining a primary impression;
trimming the initial impression to reserve a detailed impression material space;
exposing the dentition working area needing fine model extraction;
separating free gingiva of neck tissue of a tooth body by using an air gun, and injecting light silica gel into a separation gap;
acquiring a final impression;
the method for separating the free gingiva of the neck tissue of the tooth body by using the air gun and injecting light silica gel into the separation gap comprises the following steps:
holding an air gun and a light silica gel injection gun at the same time, starting from one side edge of a dentition working area, enabling the air flow of the air gun to continuously act on the tooth surface of the neck of the tooth body, separating the free gingiva adhered to the neck of the tooth body, and injecting light silica gel into a separation gap;
and simultaneously moving the light silica gel injection gun and the air gun in sequence, and repeating the steps until the dentition working area is completely covered.
2. The air gun impression taking method according to claim 1, wherein trimming the initial impression comprises the steps of:
and (3) trimming the primary impression by using a silica gel knife, and uniformly removing the silica gel impression material on the whole tissue surface.
3. The air gun mold extraction method according to claim 2, wherein the thickness of the silicone impression material removed is 0.5-1 mm.
4. The air gun model taking method according to claim 1, characterized in that the air gun is at an angle of 30-45 degrees with respect to the labial surface of the tooth body, and the tip of the air gun is 3-4cm away from the gingival margin.
5. The air gun mold extraction method according to claim 1, wherein the air pressure of the air gun is 2-4 bar.
6. The air gun impression taking method according to claim 1, wherein the taking of the initial impression comprises the steps of:
adjusting the body position of the patient;
selecting a tray suitable for the oral cavity of a patient, and smearing heavy silica gel on the tray;
placed in the patient's mouth and a primary impression taken.
7. The air gun impression taking method of claim 1, wherein exposing the dentition work area comprises the steps of:
the double-side mouth gag is used for exposing the dentition working area needing fine sampling.
8. The air gun impression taking method according to claim 7, wherein the obtaining of the final impression comprises the steps of:
injecting light silica gel into the tissue surface of the primary impression;
removing the double-side mouth gag;
the final impression is taken by placing the initial impression into the mouth of the patient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010868141.0A CN111938848B (en) | 2020-08-26 | 2020-08-26 | Air gun mould taking method without gum line removal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010868141.0A CN111938848B (en) | 2020-08-26 | 2020-08-26 | Air gun mould taking method without gum line removal |
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| CN111938848A CN111938848A (en) | 2020-11-17 |
| CN111938848B true CN111938848B (en) | 2022-01-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201806797U (en) * | 2010-10-20 | 2011-04-27 | 傅国 | Gum retracting device |
| CN105726139A (en) * | 2014-12-10 | 2016-07-06 | 十堰市太和医院 | Gingival retraction device |
| CN206355161U (en) * | 2016-09-13 | 2017-07-28 | 罗水辉 | A kind of dental impression material pneumatic injector |
-
2020
- 2020-08-26 CN CN202010868141.0A patent/CN111938848B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201806797U (en) * | 2010-10-20 | 2011-04-27 | 傅国 | Gum retracting device |
| CN105726139A (en) * | 2014-12-10 | 2016-07-06 | 十堰市太和医院 | Gingival retraction device |
| CN206355161U (en) * | 2016-09-13 | 2017-07-28 | 罗水辉 | A kind of dental impression material pneumatic injector |
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| Publication number | Publication date |
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| CN111938848A (en) | 2020-11-17 |
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