CN203564351U - Cover screw for dental implant - Google Patents

Abstract

The utility model provides a covering screw for a dental implant, which comprises a covering screw main body. The covering screw main body is sequentially arranged as a sealing part, a connecting part and a quick positioning guide part from top to bottom. The sealing part, the connecting part and the quick positioning The central axes of the three guide parts are coincident; the sealing part includes an inverted conical truncated cone, and the outer wall of the connecting part is provided with external threads, and the inverted conical truncated cone is connected to the connecting part; hole. The precision-machined conical surface of the inverted conical truncated part of the sealing part and the external thread on the connecting part enable the utility model and the inner conical surface of the dental implant to be pressed together by the pressure of the threaded connection to achieve the effect of sealing the inner cavity of the dental implant , Effectively prevent micro-leakage of bacteria and foreign bodies, prevent infection, and promote gingival closure.

Description

Dental implant cover screws

technical field

The utility model relates to a dental implant medical device, in particular to a dental implant covering screw.

Background technique

In modern dental implant surgery, the most widely used dental implant system includes three parts: dental implant, abutment, and connecting screw. In the process of dental implant surgery, the dental implant needs to be implanted in the alveolar bone of the patient first, and then the corresponding restoration abutment is installed on the dental implant according to the patient's condition, locked by the connecting screw, and finally assembled on the abutment Dental crown, complete surgery.

However, these steps are completed in stages, and a lot of auxiliary instruments are needed. For example, after the dental implant is implanted, it needs to be installed on the dental implant with covering screws. After the dental implant and the upper gingival tissue are stabilized A second operation is then performed to complete the installation of the abutment. Among them, the covering screw is required to tightly connect the implant and seal the inner cavity of the implant to prevent bacteria from entering and adhering, causing gum infection.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a dental implant covering screw, which can effectively seal the inner cavity and prevent the micro-leakage of bacteria and foreign matter.

In order to achieve the above object, the utility model adopts the following technical solutions:

A dental implant covering screw, comprising a covering screw main body, the covering screw main body is sequentially arranged as a sealing part, a connecting part and a quick positioning guide part from top to bottom, the sealing part, the connecting part and the quick positioning guiding part The central axis coincides with each other; the sealing part includes an inverted truncated cone, and the outer wall of the connecting part is provided with external threads, and the inverted truncated cone is connected with the connecting part; a blind hole is vertically opened on the top surface of the covering screw body.

Preferably, the outer surface of the inverted truncated cone is a precision-machined conical surface, and its surface roughness is less than Ra3.2.

Preferably, the taper angle of the outer surface of the inverted truncated cone is 30 degrees, or 45 degrees, or 60 degrees, or 90 degrees, or 120 degrees.

Preferably, the blind hole is a regular hexagonal hole, or a regular quadrilateral hole, or a straight hole, or a cross hole.

Preferably, the material covering the screw body is medical pure titanium or titanium alloy.

Preferably, the outer surface of the covering screw main body is coated with an anti-wear layer.

Compared with the prior art, the utility model has the following beneficial effects:

The precision-machined conical surface of the inverted conical truncated portion of the sealing part and the external thread on the connecting part enable the utility model to be tightly fitted with the inner conical surface of the dental implant through the pressure of the threaded connection to achieve the effect of sealing the inner cavity of the dental implant , Effectively prevent micro-leakage of bacteria and foreign bodies, prevent infection, and promote gingival closure.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

In the picture:

1—sealing part; 11—inverted cone; 2—connecting portion; 21—first cylinder; 22—second cylinder; 221—external thread; 3—quick positioning guide; 4—blind hole.

Now in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Detailed ways

As shown in FIG. 1 , it is a covering screw for a dental implant described in the present invention, which includes a covering screw main body.

The cover screw body is sequentially arranged as a sealing part 1, a connecting part 2 and a quick positioning guide part 3 from top to bottom, and the central axes of the sealing part 1, the connecting part 2 and the quick positioning guiding part 3 coincide.

The sealing part 1 includes an inverted conical frustum 11; the connecting part 2 includes a first cylinder 21 and a second cylinder 22 from top to bottom, the diameter of the first cylinder 21 is greater than the diameter of the second cylinder 22, and the second cylinder The outer wall of 22 is provided with an external thread 221; the quick positioning guide part 3 is cylindrical in shape. The inverted conical frustum 11 is connected to the first cylinder 21 of the connecting part 2, and the quick positioning guide part 3 is connected to the second cylinder 22; a blind hole 4 is vertically opened on the top surface of the covering screw body.

The outer surface of the inverted conical frustum 11 is a precision-machined conical surface, and its surface roughness is less than Ra3.2; the conical surface angle of the outer surface of the inverted conical frustum 11 is 30 degrees, or 45 degrees, or 60 degrees, or 90 degrees degrees, or 120 degrees.

Blind hole 4 is regular hexagonal hole, also can be regular quadrilateral hole, or straight hole, or cross hole.

The covering screw main body is made of medical pure titanium or titanium alloy, and the outer surface of the covering screw main body is coated with an anti-wear layer.

The utility model is mainly used for dental implants with an inner connection taper surface and an inner thread connection. The precision-machined conical surface of the inverted conical truncated part of the sealing part of the utility model and the external thread on the connecting part cooperate with the internal connecting conical surface and internal thread of the dental implant to achieve the effect of sealing the inner cavity of the dental implant and effectively prevent bacteria and Micro-leakage of foreign bodies, preventing infection and promoting gingival closure.

partial structural role

Quick positioning guide: The cylindrical quick positioning guide is inserted into the cavity of the dental implant (that is, the internal thread hole), which can quickly and initially locate the center of the shaft and guide the entire cover screw to be screwed in along the axial direction of the dental implant.

Inverted truncated cone of the sealing part: the angle of the cone surface is consistent with the angle of the inner cone surface of the dental implant, and it can fit tightly after compression to prevent penetration.

The blind hole at the top is used as a tool hole for inserting and holding tools.

Surgical applications of cover screws:

During the operation, after the dental implant is implanted, take out the cover screw from the vacuum package; insert the hand tool into the tool hole, then take out the cover screw through the hand tool and extend the cover screw into the cavity of the dental implant, and quickly through the quick positioning guide Locate the position of the internal thread of the implant, and screw it in through the external thread of the connecting part until the outer surface of the inverted cone of the sealing part presses the dental implant. After the completion, the gums were sutured, and after the stability of the dental implant improved, 2 operations were performed, and the cover screw was unscrewed and replaced with a healing abutment, an aesthetically pleasing restoration abutment, etc.

The utility model is not limited to the above-mentioned embodiment, if the various changes or modifications of the utility model do not depart from the spirit and scope of the utility model, if these changes and modifications belong to the claims of the utility model and within the equivalent technical scope, Then the utility model also intends to include these modifications and variations.

Claims (6)

1. a tooth implant cover screw, comprise cover screw main body, it is characterized in that, described cover screw main body from top to bottom sets gradually as sealing, connecting portion and orientation direction portion fast, and described sealing, connecting portion and fast the orientation direction three's of portion axis overlap; Described sealing comprises rounding frustum, and described connecting portion lateral wall is provided with external screw thread, and described rounding frustum is connected with connecting portion; Described cover screw main body end face is vertically offered a blind hole.

2. tooth implant cover screw according to claim 1, is characterized in that, the outer surface of described rounding frustum is the Precision Machining conical surface, and its surface roughness is less than Ra3.2.

3. tooth implant cover screw according to claim 1 and 2, is characterized in that, the conical surface angle of the outer surface of described rounding frustum is 30 degree, or is 45 degree, or is 60 degree, or is 90 degree, or is 120 degree.

4. tooth implant cover screw according to claim 3, is characterized in that, described blind hole is regular hexagon hole, or is square hole, or is a word hole, or is cross bore.

5. tooth implant cover screw according to claim 1, is characterized in that, the material of described cover screw main body is medical pure titanium or titanium alloy.

6. tooth implant cover screw according to claim 1, is characterized in that, described cover screw main body outer surface is coated with wear-resistant friction layer.

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