The present invention relates to an implant unit, particularly, a dental implant unit for mitigating impact which may be substituted for a natural tooth, the dental implant unit including: a crown; an abutment which has one side coupled to the crown; and a fixture which is coupled to the other side of the abutment, in which at least one of the abutment and the fixture has an elastic layer that is cut out in one direction, and also relates to a dental implant unit including: a crown; an implant structural body which has one side coupled to the crown, and the other side implanted from a gingiva to an alveolar bone, in which the implant structural body has an elastic layer that is cut out to have multiple layers.

There are provided zirconia composition, zirconia semi-sintered body and zirconia sintered body, and dental product in which defect-generation is suppressed and transparency varies. The zirconia sintered body contains 4 mol % to 7 mol % of yttria as stabilizer. The zirconia sintered body contains shielding material. The zirconia sintered body comprises first region and second region having a higher content ratio of the shielding material than the first region. Difference between content ratio of yttria in the first region and that of yttria in the second region is 1 mol % or less.

There is provided an implant having a slack prevention function by an eccentric fitting structure. An engaging shaft 53, which is decentered with a screw shaft 52, is provided at the end of an abutment screw 5, and is engaged with an engaging hole 45 provided in the bottom of a screw hole 44, into which an abutment screw 5 is screwed, and thus, the screw shaft 52 is inclined to and eccentric from the screw hole 44. Thereby, the screw shaft 52 comes to be strongly pressed partially in a circumferential direction toward the screw hole 44, so that internal stress in the horizontal direction is accumulated on the screw shaft 52. The screw 5 is threaded with maintaining prevailing torque caused by the internal stress, which enables the screw 5 to be fastened to the right position.

Provided is a dental bridge system including a superstructure and a support bar. The superstructure includes a proximal face formed with at least one bar-receiving groove shaped so as to snugly receive therein at least a corresponding portion of the support bar. The removable superstructure further includes a crown portion defining teeth-like members and having a structurally functional distally projecting inner core, coated by a visible layer configured to impart aesthetic qualities to the crown portion.

Provided is a powder material for forming a three-dimensional object, the powder material containing granulated particles containing: a resin; and inorganic particles of which primary particles have a volume average particle diameter of 1 micrometer or less, wherein the granulated particles have a volume average particle diameter of 10 micrometers or greater but 70 micrometers or less and a BET specific surface area of 6 m.sup.2/g or greater but 8 m.sup.2/g or less.

A dental prosthesis to be integrated into a jaw bone cavity of a pre-identified patient. An example of a dental prosthesis includes a first manufactured portion having a surface shaped to substantially dimensionally conform three dimensionally to an undersized shape of the outer three-dimensional surface shape of a root of a tooth to be replaced, and a second manufactured portion shaped to substantially conform to the three-dimensional surface of a crown of the tooth. The outer surface of the root portion can include or be coated with a biocompatible material that is suitable to be integrated into the extraction socket and adopted by existing tissue forming the socket.

Disclosed herein is an article comprising a first screw and a second screw, the first screw being reversibly attached to the second screw such that a longitudinal axis of the first screw coincides with or is parallel to a longitudinal axis of the second screw; the first screw and the second screw each comprising a biodegradable composition, the biodegradable composition comprising a metal or metal alloy comprising magnesium, strontium, zinc, calcium or a combination comprising at least one of the foregoing. Methods of making and using the article are also disclosed herein.

Subject matter of the invention are prosthetic mouldings, which have, at least area by area, at least one layer of biomimetic apatite selected from fluorapatite, hydroxylapatite or their mixtures on their surface, wherein the surface of the mouldings has micromechanical anchoring positions at least in this area to improve mechanical connection of apatite to the surface. Another subject matter of the invention are mouldings for use in dental, prosthetic treatment for tooth loss, in particular for cellular attachment of cells to prosthetic mouldings. Moreover, subject matter of the invention is the method for the production of the prosthetic mouldings.

A dental prosthesis and a process for design and manufacturing, incorporating a dental implant framework and veneering overlay that will be designed and manufactured simultaneously and permanently fixated to one another.

The present invention relates to a dental implant, and more particularly, to a dental implant including a fixture 10, an abutment 30 coupled to an upper end of the fixture 10, and an abutment fixing screw 40 coupling the abutment 30 to the fixture 10. The fixture 10 is molded of ceramic and includes a screw part 13 disposed on an outer circumferential surface and a screw hole 14, to which the abutment fixing screw 40 is coupled, disposed in a central axis direction. A helical coil 20 is disposed between the screw hole 14 of the fixture 10 and the abutment fixing screw 40 to couple an outer portion 21a of the helical coil 20 to a screw valley 14a of the screw hole 14 of the ceramic fixture 10 and an inner portion 21b to a valley 41a of the screw part 41 of the abutment fixing screw 40 in a screw coupling manner.