Abstract: Provided is a production method of a tissue regeneration material whereby a cell suspension can be seeded and cultured on a porous support having relatively large pores. The method comprises: contacting a porous body to a holding plate having a contact angle to water of 15 to 90°, the porous body being formed of a bioabsorbable polymer material, having a thickness of 2 to 100 mm, an interconnected porous structure with a pore diameter of 180 to 3500 ?m and an average pore diameter of 350 to 2000 ?m, a porosity of 60 to 95%, and a compressive strength of 0.05 to 1 MPa, and being filled with a cell suspension having a cell density of 5×106 to 1×108 cell/ml; and arranging the holding plate to be on the porous body, and keeping the porous body still, to thereby seed cells on the porous body.

Abstract: The present invention provides a system for embedding an artificial tooth root whereby holes of various depths can be bored into an alveolar bone more stably and kinds of drills and kinds of spacers to be included herein can be reduced. The system for embedding an artificial tooth root comprises: two kinds of dental drills to bore a hole into the alveolar bone which have predetermined different lengths and have a predetermined relation; and one to three kinds of spacers to be attached to the dental drills, for combinations of an artificial tooth root and a surgical guide, the artificial tooth root being selected from a group of artificial tooth roots formed of two to five kinds of artificial tooth roots, and the surgical guide being selected from a group of surgical guides formed of one to three kinds of surgical guides.

Abstract: To provide a most suitable block body for producing a denture base used when producing a denture base by cutting, the block body for producing a denture base is produced by polymerizing a (meth)acrylate monomer so as to have a color tone within a range that L* is 40 to 55, a* is 14 to 31, and b* is 5 to 20 when the color tone is measured with a sample thickness of 4 mm based on JIS Z8729, and to be preferably in a cylindrical shape having a diameter of 8 to 15 cm and a height of 1.5 to 5 cm, or in an elliptical-cylindrical shape having a major diameter and minor diameter of 8 to 15 cm and a height of 1.5 to 5 cm.

Abstract: To provide a silicone impression material having high viscosity of a kneaded material before curing and low hardness after curing. A dental silicone impression material composition includes: A) an organopolysiloxane mixture comprising a) an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons in one molecule and having viscosity of 1,000,000 mPa·s or more at 25° C., and b) an organopolysiloxane having at least one aliphatic unsaturated hydrocarbon in one molecule and having viscosity of 100 to 5,000 mPa·s at 25° C., wherein a ratio of a):b) is 1:0.5 to 10; B) an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to a silicon atom in one molecule; C) a silicone-soluble platinum compound; D) an organopolysiloxane not having a functional group; and E) an inorganic filler.

Abstract: A dental impression tray includes a tray body 1 and a handle portion 2. The tray body 1 has an engaging convex portion 1a on an anterior tooth part of the area corresponding to an alveolar crest thereof and a L-shaped handle portion 2 has an engaging portion 2a engaging with the engaging convex portion 1a on a top end thereof. The handle portion 2 can be detached at a time of bite taking for recording occlusal positions. As for embodiments of the engaging convex portion 1a and the engaging portion 2a, there are one embodiment in which the engaging convex portion 1a is a projection and the engaging portion 2a is a hole engaging with the projection, and another embodiment in which the engaging convex portion 1a is a dovetail projection and the engaging portion 2a is a dovetail groove engaging with the dovetail projection by sliding.

Abstract: A stopper Y is cylindrically formed in its entirety and inserted and attached from a top side of a blade Xc of a drill X having a flange Xa projecting at a shank Xb. The stopper has a through hole to be inserted by the blade Xc of the drill X and includes a drill blade entering depth regulating part Ya and a drill holding part Yb. The drill blade entering depth regulating part Ya has a height regulating a entering depth of the blade Xc of the drill X in a jawbone of the lost tooth part. The drill holding part Yb has a plurality of slits Yba formed along the axial direction of the stopper from an end opposite to the drill blade entering depth regulating part Ya, detachably engages to the flange Xa of the drill X, and holds the drill X by elasticity.

Abstract: A method for creating three-dimensional data of a position of an outer periphery at the occlusal surface side of a keeper includes steps of placing a keeper analog having a reference plane in same shape as and in parallel to a surface at the occlusal surface side of a keeper to be embedded projectingly on an abutment model, three-dimensionally measuring an outside shape of the abutment model having the keeper analog, acquiring a normal vector and an outer periphery of the reference plane based on the measured three-dimensional data, moving the outer periphery to a position at the abutment model side by a height of the keeper analog from the reference plane along the normal vector and acquiring three-dimensional data of the outer periphery based on the position.

Abstract: The present invention provides an occlusal pressure measuring device which makes it possible to capture the positional relation between measurement results of the occlusal pressure and the tooth row more easily and more precisely. The occlusal pressure measuring device 1 comprises: a sensor portion 10 capable of measuring occlusal pressure; and a body 20 which transmits information obtained from the sensor portion, wherein the sensor portion is a laminate of a plurality of layers; at least one of the plurality of layers is a pressure sensitive layer capable of detecting occlusal pressure; and the outermost layer of the sensor portion is a shape transfer layer which can be deformed by the occlusal pressure and can retain the deformation even when the occlusal pressure is removed.

Abstract: Provided is an intraoral inspection apparatus for dental use capable of distinguishing and detecting more kinds of diseased sites etc. with one apparatus. The apparatus comprises: a light source unit provided with color-producing light sources capable of inducing fluorescent lights from diseased sites; a wavelength adjusting device provided with a first filter that transmits, among the fluorescent lights, a light having a wavelength of a fluorescent light from a predetermined diseased site and blocks or attenuates a light having a wavelength other than this, and provided with a second filter that transmits, among the fluorescent lights, a light having a wavelength of a fluorescent light from a diseased site different therefrom and blocks or attenuates a light having a wavelength other than this; and an imaging device which receives the fluorescent lights transmitted through the first filter and the second filter, and converts them into electrical signals.

Abstract: To provide a dual curing type composite resin for core build-up having improved curing property by chemical polymerization with improved mechanical strength of a cured body under the condition of no light irradiation and with a shortened setting time, the composite resin is composed of a first component including a (meth)acrylate polymerizable resin and an organic peroxide, and a second component including (meth)acrylate polymerizable resin and a reducing agent, a photopolymerizaton initiator and a filler are included in the first component and/or the second component, and oxide powder of a Group II element in the periodic table having an average particle diameter of 1 ?m or less is blended in the first component and/or the second component.

Abstract: For proper fitness of a core portion of an abutment to a patient, a wax model base for an abutment of a dental implant includes an engagement portion 1 engaging with an implant fixture analog embedded in a gypsum model without rotation, a truncated conical portion 2, a building portion 4 provided directly on an inner peripheral edge of a ring-like first stepped portion 3, which is provided on an oral cavity inner side of the truncated conical portion 2, or through a cylindrical portion 4a having a low height to have a conical shape expanding toward the oral cavity inner side and have a cutoff portion 5 on an outer peripheral surface, a cylindrical portion 7 provided on an inner peripheral edge of a ring-like second stepped portion 6 provided on the building portion 4, and a screw hole 8 along a center axis of the base.

Abstract: Polymerization apparatus for dental technology, having a housing; a partition wall disposed in the housing so as to form a polymerization space where polymerization is carried out; a rotating table, which is arranged on a lower side of the polymerization space and on which the dental prosthesis is disposed directly or via other members; and a plurality of LED light sources which irradiate a light for the curing to a polymerization region, which is formed on the upper side of the rotating table and where the dental prosthesis can be disposed, wherein at least one of the plurality of LED light sources is disposed such that a light axis thereof is inclined obliquely upward to be directed toward the polymerization region.

Abstract: Designing of a coping for proper working is made possible. Based on three-dimensional data on a model of an abutment tooth to which a dental prosthesis is applied stored in RAM (Random Access Memory) and on three-dimensional position information about a margin line of the model stored in another RAM, on a face containing a reference axis of the model, three-dimensional position information about a side face of a coping is determined so that a specified angle is formed between a margin line and a surface of the model and three-dimensional position information about the side face of the coping on each of a plurality of different faces containing the reference axis over an entire circumference in a direction surrounding the reference axis is detected by a coping processing section.

Abstract: To provide a dental abutment having an embedded part embedded into an embedding hole of a block and fixed in the embedding hole. An uniform gap for a dental adhesive can be formed along an approximately entire circumference between an outer peripheral surface of the embedded part and an inner surface of the embedding hole. The dental abutment includes a gingiva contact part 1 having a forward-thicker truncated conical shape on the intraoral side; a fitting part 2 projecting toward the jawbone side from the jawbone-side contact surface 1a of the gingiva contact part 1, and fitted into an end part on the intraoral side of the implant fixture so as not to rotate; and an embedded part 3 to be embedded. Three or more projecting line parts 5 are formed on an outer peripheral surface 3a of the embedded part 3 so as to form the uniform gap.

Abstract: A wellbore obstruction-clearing tool connected to the bottom of a tubing string, such as casing, utilizes a sleeve which is axially and rotationally moveable in response to axial reciprocation of a tubing string to engage and clear obstructions in the wellbore. Fluid is discharged through the casing and the tool to engage the obstructions and to convey debris through the annulus to surface. Thus, the obstructions are cleared from the wellbore, permitting the casing to be advanced, without the need to rotate the casing.

Abstract: To provide a zirconia-based composite ceramic sintered compact capable of being colored to white appropriate for a dental prosthesis while maintaining its mechanical and physical properties, and also provide a method for producing the same. The method for producing the zirconia-based composite ceramic sintered compact includes semi-sintering a zirconia-alumina composite ceramic containing an alumina particle and a zirconia particle comprising of tetragonal zirconia containing ceria of 8 to 12 mol %, forming the composite ceramic; dipping the formed composite ceramic in a neodymium ion solution or complex solution; drying the dipped composite ceramic; and finally sintering it.

Abstract: The present invention provides a stand for a dental technical material which is capable of increasing flexibility and reducing difficulty in arranging a dental model. The stand for a dental technical material, for attaching thereto a dental model holding a dental technical material, the dental model being provided with a pin, comprises a body; the body is provided with a holding device which holds the pin; and the holding device is deformable.

Abstract: To provide a dental implant abutment made of titanium, which is mounted on the intraoral side of a dental implant fixture embedded in a jawbone and coming to be an artificial tooth root, penetrates through gingiva, and comes to be a base of an upper structure. The dental implant abutment does not remarkably impair aesthetic property even when the intraoral portion of the dental implant abutment is seen through gingiva. The surface of the dental implant abutment made of titanium is colored to have the value of L* within a range from 40 to 44, the value of a* within a range from 21 to 40 and the value of b* within a range from ?20 to 10, which are represented by L*a*b* color system.