JP2009082170A - Abutment for dental implant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abutment for dental implant to be the base of an upper structure by being engaged with the oral cavity inner side of an implant fixture to be embedded in the jawbone and turned to the dental implant and being made to pass through the gingiva, which does not remarkably damage aesthetic appreciation even when gingiva retraction occurs accompanying bone resorption in a patient to whom implant treatment is executed, in dental implant treatment for restoring the lost oral cavity function of a lacking tooth part. <P>SOLUTION: The abutment 1 for the dental implant, to be the base of the upper structure by being engaged with the oral cavity inner side of the implant fixture to be embedded in the jawbone and turned to the dental implant and being made to pass through the gingiva, is formed to be the shape provided with a recess 1b whose vertical section is circular arcuate on a part positioned on the oral cavity inner side on the lip side for a front tooth and on the cheek side for a molar tooth at least of the gingiva through part 1a spreading on the oral cavity inner side from the oral cavity inner side end face of the implant fixture. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dental implant treatment for recovering a lost oral function of a missing tooth part, and is engaged with the inner side of an oral cavity of an implant fixture that is embedded in a jawbone to become an artificial tooth root, penetrates the gingiva, and superstructure The present invention relates to an abutment for a dental implant that serves as a foundation of the body, and does not significantly impair aesthetics even if gingival retraction accompanied by bone resorption occurs in a patient who has undergone implant treatment.

  As a treatment method to recover the lost oral function of the missing tooth, a dental prosthesis is placed inside the oral cavity of the implant fixture that becomes an artificial tooth root that is embedded in the jaw bone of the missing tooth and bonded to the jaw bone. Fixed dental implant treatment has become widespread. In this dental implant treatment, a structure in which a dental implant abutment that penetrates the gingiva is arranged inside the oral cavity of the implant fixture, and a dental prosthesis is arranged inside the oral cavity of the dental implant abutment is common. (For example, refer to Patent Document 1 and Patent Document 2.)

  This abutment for dental implants is provided with an engaging part for engaging the implant fixture so as not to rotate inside the oral cavity, and has a gingival penetration part that extends inside the oral cavity following the engaging part. Furthermore, following this gingival penetrating part, it has a prosthesis fixing part integrally inside the oral cavity as in Patent Document 2, and it consists of another member as in Patent Document 1 inside the oral cavity of this gingival penetrating part. Some have an oral cavity inner engagement portion for engaging the prosthesis fixing member so as not to rotate.

  However, in such dental implant treatment, bone resorption occurs over time in patients who have undergone dental implant treatment, and gingival retraction may occur along with this. When such gingival retraction occurs, the lip side or cheek side portion of the gingival penetration portion of the dental implant abutment that penetrates the gingiva arranged inside the oral cavity of the implant fixture is exposed.

However, since conventional abutments for dental implants are made of titanium or titanium alloy in consideration of biocompatibility etc., the lip side or cheek side portion of the gingival penetration part of the dental implant abutment is exposed. Then, metallic titanium or titanium alloy will appear inside the oral cavity of the gingiva, and the aesthetics will be significantly impaired.
In recent years, due to the advancement of dental CAD / CAM technology, a method of scraping a dental implant abutment from a ceramic block has become widespread. However, since this ceramic is mainly composed of zirconia, it is white. Since the lip side or cheek side portion of the gingival penetration part of the dental implant abutment is exposed, a ceramic close to white is visible inside the oral cavity of the gingiva, so that it is remarkably aesthetic. It will damage the sex.

  When the lip side or cheek side portion of the gingival penetrating portion of the dental implant abutment is exposed and the aesthetics are significantly impaired in this way, the dental implant abutment is replaced with a lower one or cut. Then, it is necessary to re-create the prosthetic part from the occlusal acquisition, but this is not preferable because the physical and financial burden on the patient with gingival recession is large.

  Therefore, as a method for recovering the bone resorbed jaw bone and the retracted gingiva, gingival transplantation and a surgical treatment method using Emdogain, GTR, GBR, etc. have been proposed, but such a treatment method is still practical. Not only that, the burden on patients with gingival recession is still high.

JP-A-7-80003 Publication 8 JP 2003-325552 A

  An object of the present invention is to provide an abutment for a dental implant that does not significantly impair aesthetics even if gingival retraction accompanying bone resorption occurs in a patient who has undergone dental implant treatment.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors engaged in the oral cavity of the implant fixture, which is embedded in the jawbone and becomes an artificial tooth root, penetrates the gum and becomes the foundation of the upper structure. A longitudinal section of an abutment for a dental implant at a site located inside the oral cavity of the gingival penetrating portion extending from the inner end surface of the implant fixture to the inner side of the gingiva, on the lip side in the case of at least the front teeth and on the buccal side in the case of molars Assuming that an arc-shaped depression is provided, even if gingiva enters the arc-shaped depression and gingival recession occurs due to bone resorption, the gingival recession is prevented by the gum that has entered the arc-shaped depression. The present invention has been completed by investigating that even if gingival recession caused by bone resorption occurs in a patient who has undergone dental implant treatment, aesthetics are not significantly impaired.

  That is, the present invention is an abutment for a dental implant that is embedded in the jaw bone and is engaged with the inside of the oral cavity of an implant fixture that becomes an artificial tooth root, penetrates the gum, and becomes the base of the upper structure. In the case of at least the front teeth of the gingival penetrating part extending from the inner end surface of the oral cavity to the inner side of the mouth, the lip side is provided on the buccal side in the case of molars, and a recess having an arc-shaped longitudinal section is provided at the site located inside the oral cavity. A dental abutment for dental implants.

  In such an abutment for dental implants, the longitudinal section has a circular arc-shaped depression that forms a part of a substantially spherical surface, a groove that is continuous along the side surface of the gingival penetration part, Some of them have a groove shape continuous over the entire circumference of the side surface of the part, and those having a prosthesis fixing site inside the oral cavity of the gingival penetration part are preferable.

  The abutment for a dental implant according to the present invention is a part located on the labial side in the case of at least the front teeth of the gingival penetration part extending from the inner side of the oral cavity of the implant fixture to the inner side of the gingiva, on the buccal side in the case of molars and on the inner side of the oral cavity Since the dentition is provided with an arc-shaped depression in the longitudinal section, the gingiva enters the arc-shaped depression and the gingiva and the dental implant abutment are integrated. Since gingival retraction is prevented by the gingiva that has entered the arc-shaped depression even if retraction occurs, the aesthetics are not significantly impaired even if gingival retraction occurs due to bone resorption in patients who have undergone dental implant treatment. is there.

And if the vertical section has a circular arc-shaped recess that is continuous along the side surface of the gingival penetrating portion or a continuous groove shape along the entire side surface of the gingival penetrating portion, The gingiva whose longitudinal cross-section has entered the arc-shaped depression prevents saliva and bacteria from reaching the implant fixture along the gingival penetration of the dental implant abutment, thus protecting the bond between the implant fixture and the jawbone. Is preferable.
Also, if it has a prosthesis fixing part inside the oral cavity of the meat penetration part, it is most suitable for the patient when the dental abutment is cut out from the ceramic block by dental CAD / CAM technology This is preferable because a portion for fixing the prosthesis having a different shape can be integrally formed.

Hereinafter, an abutment for a dental implant according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of an abutment coping for a dental implant according to the present invention, FIG. 2 is a perspective view showing another embodiment of the abutment for a dental implant according to the present invention, and FIG. Fig. 4 is a perspective view showing still another embodiment of the dental implant abutment. Fig. 4 is a cross-sectional explanatory view showing a state where the dental implant treatment is completed using the dental implant abutment according to the present invention shown in Fig. 3. It is.

  In the drawing, 1 is an abutment for a dental implant according to the present invention, which is embedded in the jaw bone and is engaged with the inside of the oral cavity of an implant fixture that becomes an artificial tooth root, penetrates the gum, and becomes the foundation of the upper structure, A dent 1b having an arc-shaped longitudinal section is formed at a position on the labial side of at least the front tooth of the gingival penetrating portion 1a extending from the inner end surface of the implant fixture to the inner side of the oral cavity, and on the buccal side in the case of a molar, and located in the oral cavity Preferably, it has a prosthesis fixing part 1c inside the oral cavity of the gingival penetration part 1a. In the case where the side surface of the gingival penetrating portion 1a is made of metal, it is preferable that the side surface is mirror-finished so as to have good adhesion to the gingiva.

  The dental implant abutment 1 has an arcuate recess 1b having a substantially spherical shape as shown in FIG. 1 or a side surface of the gingival penetration 1a as shown in FIG. Or a continuous groove shape over the entire circumference of the side surface of the gingival penetrating portion 1a as shown in FIG.

  When the dental implant treatment is performed using the dental implant abutment 1 according to the present invention, as shown in FIG. 4, the dental implant abutment 1 is provided inside the oral cavity of the implant fixture which is embedded in the jawbone and becomes an artificial tooth root. In the case of at least the front teeth of the gingival penetrating portion 1a extending from the inner end surface of the oral cavity of the implant fixture of the dental implant abutment 1 according to the present invention engaged with the hexagonal concave portion to the hexagonal concave portion In the case of the side or molar, a depression located on the buccal side of the oral cavity (in the embodiment shown in FIG. 4, a part continuous over the entire circumference of the side surface of the gingival penetration part 1a) Since 1b is provided, this longitudinal section is integrated into the gingival penetration part 1a by entering the gingiva into the arc-shaped depression 1b. Even if it occurs, gingival retraction is prevented at the gingival part integrated with the gingival penetration part 1a by this longitudinal section entering the arc-shaped depression 1b, so in the case of anterior teeth of dental implant abutments, the labial side and molar teeth In this case, the phenomenon that the portion on the cheek side is exposed and the aesthetics are impaired does not occur.

  When the recess 1b having an arc-shaped longitudinal section forms a continuous groove shape over the entire circumference of the side surface of the gingival penetrating portion 1a as shown in FIG. 3 and FIG. The gingiva that enters the arc-shaped depression 1b and is integrated with the gingival penetration part 1a prevents saliva and bacteria from reaching the implant fixture along the gingival penetration part of the dental implant abutment. You can also protect the bond with.

It is a perspective view which shows one Example of the abutment for dental implants which concerns on this invention. It is a perspective view which shows the other Example of the abutment for dental implants based on this invention. It is a perspective view which shows the further another Example of the abutment for dental implants which concerns on this invention. FIG. 4 is a cross-sectional explanatory view showing a state in which dental implant treatment is completed using the dental implant abutment according to the present invention shown in FIG. 3.

Explanation of symbols

1. Dental abutment
1a Gingival penetration
1b Indentation with an arc-shaped longitudinal section
1c Prosthesis fixation site

Claims (5)

  An abutment for a dental implant that is embedded in the jaw bone and is engaged with the inside of the oral cavity of the implant fixture that becomes an artificial root and penetrates the gingiva and becomes the foundation of the superstructure, from the oral cavity inner end surface of the implant fixture to the oral cavity At least the front teeth of the gingival penetrating part (1a) extending inwardly are provided with a dent (1b) having an arc-shaped longitudinal section in the lip side in the case of a molar and on the buccal side in the case of a molar tooth and located inside the oral cavity A dental abutment (1) characterized by   The abutment (1) for a dental implant according to claim 1, wherein the hollow (1b) having a circular arc in a longitudinal section forms a part of a substantially spherical surface.   The abutment (1) for a dental implant according to claim 1, wherein the recess (1b) having an arcuate longitudinal section has a groove shape continuous along the side surface of the gingival penetration part (1a).   The abutment (1) for a dental implant according to claim 3, wherein the depression (1b) having an arcuate longitudinal section is a groove shape continuous over the entire circumference of the side surface of the gingival penetration part (1a).   The abutment (1) for dental implants according to any one of claims 1 to 4, further comprising a prosthesis fixing part (1c) inside the oral cavity of the gingival penetration part (1a).

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