JPH0611710U - Circular knife with dental center guide - Google Patents

Abstract

(57) [Abstract] [Purpose] A hole concentric with the artificial tooth root body can be accurately and easily formed in the gingiva. [Structure] A center guide that fits the inner diameter of the female screw hole of the artificial tooth root is attached to the axial center of the circular knife for gingiva removal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circular knife with a dental center guide.

 Circular knives for dental materials (hereinafter referred to as "circular knives") are dental instruments that are used to cut the gingiva into a cylindrical shape. A plan view of a conventional circular knife is shown in FIG. 1, and a sectional view thereof is shown in FIG. How to use the circular knife will be described with reference to Figs. Attach the shaft 1 to the dental handpiece and rotate it. By pressing the cutting edge portion 2 against the gingiva of the portion to be cut off, the portion can be cut into a cylindrical shape.

 This device was devised because it was necessary to concentrate the gingiva concentrically in an existing hole in the denture manufacturing method using an artificial tooth root.

 FIG. 3 is a plan view of a first embodiment of a circular knife with a dental center guide according to the present invention (hereinafter referred to as a circular knife with a center guide), and FIG. 4 is a sectional view thereof. As shown in the figure, it has a shape in which a center guide is added to the axis of a conventional circular knife. The center guide is inserted into a hole formed in the center of the gingiva to be excised, and the gingiva is excised.

 An example of this technique will be described with reference to FIGS. 5, 6, 7, and 8. FIG. 5 shows a state in which the artificial tooth root 7 has been fixed to the jawbone due to new bone formation several months after the artificial tooth root 7 was embedded in the jawbone. The artificial tooth root is provided with a female screw, and at this stage, the blind screw 8 is screwed into the female screw.

 FIG. 6 is a cross-sectional view of FIG. 5 in which the gingival part is incised in a cross shape and the blind screw 8 is taken out.

 FIG. 7 shows that, as shown in FIG. 6, the center guide 4 of a circular knife with a center guide, which is slightly thinner than this, is inserted into the female screw hole of the artificial tooth root 7, and the gingiva is concentrically cut into the female screw hole.

 FIG. 8 shows that the abutment 9 is screwed into the female screw hole of the artificial tooth root 7 and the crown 10 is attached to the abutment 9.

 With the conventional circular knife, the gingiva around the female screw hole is visually excised in the surgical procedure described in Fig. 6, so the gingiva should be excised larger than necessary. However, by using a circular knife with a center guide, minimal gingival resection can be expected and faster healing of the incision can be expected.

 FIG. 9 shows a second embodiment of this invention. The step and the center guide 4 of the second embodiment were provided with a step thicker than the prepared hole. If this thick step hits the pilot hole, the circular knife with center guide will not be pushed any further. This makes it possible to adjust the depth of the gingiva to be cut into a cylindrical shape.

 As described above, the use of the circular knife with the center guide according to the present invention makes it possible to easily and accurately perform a surgical operation in which a gingiva or the like is excised concentrically in a hole. It is also possible to adjust the depth of resection of the gums.

[Brief description of drawings]

1 is a plan view of a conventional circular knife. FIG. 2 is a sectional view of a conventional circular knife. FIG. 3 is a plan view of a circular knife with a center guide showing a first embodiment of the present invention. Sectional drawing of the circular knife with a center guide which shows 1st Example FIG. 5 is explanatory drawing which shows the state in which the artificial tooth root 7 was embedded in the jawbone. FIG. 6 shows the place where the blind screw 8 was taken out from the artificial tooth root 7. Explanatory diagram FIG. 7 is an explanatory diagram showing a gingiva being cut by a circular knife with a center guide. FIG. 8 is an explanatory diagram showing a dental crown 7 mounted on an artificial tooth root 7. FIG. 9 is a second embodiment of the present invention. Cross-sectional view of a circular knife with a center guide showing an example 1 …… Circular knife shaft 2 …… Circular knife cutting edge 3 …… Circular knife body 4 ... Center guide 5 ...... jawbone 6 ...... gingival 7 ...... artificial tooth root 8 ...... blind screw 9 ...... abutment 10 ...... crown

Claims (1)

[Scope of utility model registration request] Circular knife with a dental center guide with a center guide attached to the center of the circular knife for teeth.