Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Quartz solid solution glass ceramics and precursors thereof are described, which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.

The invention relates to a method for the preparation of a glass ceramic or a glass, which comprise cerium ions and are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth. The invention also relates to a glass ceramic and a glass which can be obtained using the method according to the invention, the use thereof as dental material and in particular for the preparation of dental restorations, as well as a glass-forming composition which is suitable for use in the method according to the invention.

A gingiva former (1) comprises an implant fixing structure (11) configured to fix the gingiva former (1) to an implant construction fixed to a jaw of a patient, and an emergence profile portion (12) configured to be positioned within a gingiva of the patient when the gingiva former (1) is mounted to the implant construction. It further comprises a mounting structure (13) configured to connect an intermediate element to the gingiva former (1) such that the intermediate element extends towards an oral cavity of the patient when the gingiva former (1) is mounted to the implant construction. The mounting structure (13) has a clipping geometry (131) configured to snap-fit with a corresponding clipping structure of the intermediate element to temporarily mount the intermediate element to the gingiva former (1).

To provide a more convenient row of connected artificial teeth which is used for implantation, in this row of connected artificial teeth, a plurality of artificial teeth (11) that are formed of resin are integrally connected, an occlusal face (11a) is formed over one face of each of the artificial teeth, and a hole (12) is provided for at least one of the artificial teeth on an opposite side of the occlusal face, into the hole a coupling member with an artificial tooth root being to be inserted.

A novel screw-fastening assembly having anti-loosening capabilities includes a first and a second screw elements 11,12 adapted to be screw-fastened; the element 12 includes a recess R, the recess being open toward the element 11; and the element 11 includes an protrusion P, the protrusion being introduced into the recess R in a fastened state. The recess R has an inner peripheral surface formed in a cylindrical shape that is straight along the axial direction. The protrusion P is shaped as a circular column or cylinder having a maximum-diameter portion at one location along the axial direction. The protrusion P and the recess R are eccentric relative to each other such that the maximum-diameter portion of the protrusion and the inner peripheral surface of the recess are in pressure contact only along part of their circumference in the fastened state. The maximum-diameter portion is spaced apart from the base end of the protrusion P by a predetermined distance so as to allow the protrusion to move forward and backward along the axial direction relative to the recess R with the maximum-diameter portion being in pressure contact with the inner peripheral surface of the recess R only along part of their circumference.

A combined assembly for dental prosthesis is provided, wherein the combined assembly includes a first joint member and a second joint member. The first joint member has a first body and a plurality of elastic hooks, and the elastic hooks are annularly arranged to connect one end of the first body, wherein a slot is disposed between the adjacent elastic hooks, and each of the hook has a top portion protruding outward. The second joint member has a second body, and the second body is provided with a joint hole, a side wall surface of which is provided with a ring groove, wherein the elastic hooks extend into the joint holes, and the top portions of the elastic hooks engage into the ring groove.

A dental implant is provided, wherein the dental implant includes a dental root implant. The dental root implant forms a columnar body, and two ends thereof have a tubular portion and a joint portion, respectively, wherein the tubular portion is provided with a plurality of through holes. A central groove is formed inside the tubular portion and communicates with the through holes, wherein an inner diameter of the central groove tapers from approaching the joint portion to away from the joint portion. The joint portion can be coupled to a dental crown, and the tubular portion can be coupled to a human alveolar bone. The through holes can facilitate an osseointegration of the dental root implant in the alveolar bone.

A device and a system for forming a releasable connection between a dental implant abutment and prosthetic restoration, and in particular to such a device and system that is configured for use in situations where the inter-occlusal space is very limited, the device having a female connection device having a hollow tubular body featuring an open lumen.

The invention relates to a dual fixation system for dental implant prosthesis consisting of: an intermediate abutment assembly for fixation on the implant, clip fixation device, fixation screw and cylinder that allows the prosthesis to be screwed or retained by clip as appropriate, individually or independently for each implant.

This system facilitates both the immediate loading technique and the execution of the definitive prosthesis made on an intermediate abutment, since retention by clip is very advantageous in the case of implants with unfavorable emergencies, joining them to the structure as abutments and without compromising the esthetics of the case.