Abstract: A dental block includes a block body having a one surface, and an engagement portion to be engaged with a dental implant fixture. The engagement portion has a bolt through hole and is formed in the one surface of the block body. The dental block further includes a ring-shaped abutment surface to be abutted against a top surface on the oral cavity inner side of the dental implant fixture. The ring-shaped abutment surface is positioned more inside the block body than the one surface and is formed from an end portion positioned at the most oral cavity inner side of the engagement portion to surround the end portion, and to be parallel to the one surface of the block body. The dental block further includes a diameter-enlarged portion having a tapered shape whose diameter increases from the ring-shaped abutment surface toward the one surface of the block body.

Abstract: Provide a dental block by which, when a gap is formed between the gum and a dental abutment due to recession of the gum after fixing a dental prosthesis by using a dental implant system, a cutting process can be easily performed on a new dental abutment for covering the gap part.

Abstract: To photograph teeth and dental shade guides including marks indicating color tones of a color samples together in large size and particularly, without making the photographing distance far from the teeth, irrespective of the color samples to plate-shaped handle parts, in the dental shade guide, has a color sample modeling a form of an artificial tooth of an anterior tooth and a tag having a mark indication part are attached at one end of a plate-shaped handle part rotatably around an axis, the tag is attached at a lingual surface side of the color sample, and the mark indication part protrudes 1 to 15 mm at the maximum only from a tooth root directional end or side of the color sample.

Abstract: To photograph teeth and dental shade guides including marks indicating color tones of a color samples together in large size and particularly, without making the photographing distance far from the teeth, irrespective of the color samples to plate-shaped handle parts, in the dental shade guide, has a color sample modeling a form of an artificial tooth of an anterior tooth and a tag having a mark indication part are attached at one end of a plate-shaped handle part rotatably around an axis, the tag is attached at a lingual surface side of the color sample, and the mark indication part protrudes 0.1 to 15 mm at the maximum only from a tooth root directional end or side of the color sample.