The invention discloses a modular surgical bone screw assembly having a threaded base portion and a screw head adapted to attach a variety of structures to bone. The features of the screw include a modular design for the assembly that separates the function of anchorage to the recipient bone to one of the modules of the device (threaded portion) from the other function of attaching another element (such as bone block, membrane, orthodontic wires, elastics etc) to a second module (the screw head). The design also allows the head to be exchanged after the implant has been placed.

A zygomatic dental implant includes a generally cylindrical body, an interior threaded bore, and an asymmetrical external feature. The generally cylindrical body has a coronal portion and an apical portion. The generally cylindrical body has a main-central axis. The interior threaded bore is formed in the coronal portion of the generally cylindrical body for receiving a screw configured to removably hold an abutment in engagement with the zygomatic dental implant. The interior threaded bore has a bore-central axis. The asymmetrical external feature is on at least a portion of a first side of the generally cylindrical body such that the asymmetrical external feature is configured to directly engage alveolar bone of the patient. The asymmetrical external feature includes a plurality of circumferentially extending grooves.

A custom implant fixture which comprises a first fixture part having a first transverse section determined by a shape covered by an alveolar bone of a tooth to be extracted; and a second fixture part formed so as to extend from the first fixture part, determined from the position and the direction of a root portion of the tooth with respect to the alveolar bone, and having a second transverse section.

Dental screw which can be inserted into a cavity of a patient's maxillary and/or mandibular bone, including a terminal portion that can be inserted into the cavity so as to fit within it and so as to engage a side wall thereof. The dental screw further includes a cervical portion, configured to engage an artificial tooth structure, and a central portion extending longitudinally between the terminal portion and the cervical portion. The central portion is shaped as a porous structure, particularly as a trabecular structure, to promote an intraosseous regrowth process. The dental screw is further characterised in that the terminal portion, the central portion and the cervical portion are made from a single piece.

The present invention provides a crystallographic orientation structured titanium alloy dental implant and manufacturing method thereof. The technique of modifying the surface structure (Ti/TiO.sub.2, amorphous) of the titanium alloy dental implant to form a [Ti/TiO.sub.2 anatase (215)] crystallographic orientation structure is applied in osseointegration field for improving activity of osteocyte, shortening the identification period of initial growth of osteocyte, accelerating the integration of human bone and the calcification of osteocyte tissue, with the advantage of healing wound fast, therefore being suitable for clinical treatment of dental implant surgery. The structure is relatively stable, uneasy to be worn and damage proof, not affected by the surface roughness, and assures the hydrophilicity of the adherence capacity of osteocyte. The structure features a specific crystal grains arrangement direction (crystallographic orientation) so as to increase cell activity, hydrophilicity, and biocompatibility.

A dental implant that facilitates insertion includes a body having a coronal end and an apical end opposite the coronal end. An implant-prosthetic interface region is provided adjacent the coronal end. A tapered region is adjacent the apical end. A variable profile helical thread extends along the tapered region. The thread becomes broader in the apical-coronal direction and higher in the coronal-apical direction. The threads include an apical side, a coronal side and a lateral edge connecting them. The variable profile thread includes an expanding length of the lateral edge while the distance of the lateral edge from the base is reduced in the direction of the coronal end. The implant also has a gradual compressing tapered core, a self drilling apical end with a spiral tap, and a coronal end with and inverse tapering.

An osseous anchoring implant with cortical stabilization. The implant having: an expandable sleeve having a first threading inside and a second threading outside, a screw having an external profile complementary to the internal profile of said expandable sleeve and an external threading with a reverse screw pitch of the second threading, The implant switching from a folded rest position to a deployed position by the actuation of said reversed threading, causing the penetration of the screw into the expandable sleeve and generating the radial expansion of the expandable sleeve by deformation on a distal portion. In the deployed position, the expandable sleeve has a frustoconical shape. The proximal portion of the screw includes an outer osseous anchoring threading and a frustoconical portion whose flaring is reversed relative to that of the expandable sleeve in the deployed position.

Embodiments of the present invention provide an osseointegrative implant and related tools, components and fabrication techniques for surgical bone fixation and dental restoration purposes. In one embodiment an all-ceramic single-stage threaded or press-fit implant is provided having finely detailed surface features formed by ceramic injection molding and/or spark plasma sintering of a powder compact or green body comprising finely powdered zirconia. In another embodiment a two-stage threaded implant is provided having an exterior shell or body formed substantially entirely of ceramic and/or CNT-reinforced ceramic composite material. The implant may include one or more frictionally anisotropic bone-engaging surfaces. In another embodiment a densely sintered ceramic implant is provided wherein, prior to sintering, the porous debound green body is exposed to ions and/or particles of silver, gold, titanium, zirconia, YSZ, α-tricalcium phosphate, hydroxyapatite, carbon, carbon nanotubes, and/or other particles which remain lodged in the implant surface after sintering. Optionally, at least the supragingival portions of an all-ceramic implant are configured to have high translucence in the visible light range. Optionally, at least the bone-engaging portions of an all-ceramic implant are coated with a fused layer of titanium oxide.

A dental implant that facilitate insertion and can be used in all bone types. The implant includes a body having a coronal end, and an apical end opposite the coronal end. A tapered region may be adjacent the apical end. On the apical part one or more taps are provided so the tap is cutting when rotating clockwise and counter-clockwise. The implant can have at least one variable profile helical thread that extends along the tapered region. The implant can have also micro-threads below the main threads, a gradual compressing tapered core, a self drilling apical end and a narrow coronal region.

A dental implant that facilitate insertion and can be used in all bone types. The implant includes a body having a coronal end, and an apical end opposite the coronal end. A tapered region may be adjacent the apical end. On the apical part one or more taps are provided so the tap is cutting when rotating clockwise and counter-clockwise. The implant can have at least one variable profile helical thread that extends along the tapered region. The implant can have also micro-threads below the main threads, a gradual compressing tapered core, a self drilling apical end and a narrow coronal region.