Abstract: The present invention is a dental implant utilizing a polymeric dental post. The actual prosthetic portion of the implant may also be manufactured from a polymer. Various post designs are disclosed for setting and securing the post in a patient's jaw. Numerous polymers are disclosed and may be blended to achieve desired characteristics for both the post and prosthetic.

Abstract: An implant system (160) for fastening a blocked, detachable dental prosthesis (172) in a patient's jaw (166), comprising at least one distal implant (130) and at least one mesial implant (2), wherein each implant (2, 130) comprises a screw-in part (8) with an external thread (14), an abutment (20, 136) which can be inserted into the screw-in part (8), and a functional part (26) for fastening the dental prosthesis (172), which can be screwed together with the abutment (20, 136) by means of a functional screw (32), shall improve the anchorage of a blocked dental prosthesis (172) in a jaw (166) as against conventional solutions. For this purpose, according to the invention, the abutment (20) of each mesial implant (2) is made up of several parts, in particular of two parts.

Abstract: The invention relates to an abutment for use in a dental implant system, wherein the abutment is provided with a guiding and lock element for associating the abutment to a dental implant, the guiding and lock element including: a first conically tapered section; a second substantially non-tapered section arranged apically adjacent to the first section, the second section being provided with an anti-rotational element; and a third substantially circular cylindrical section arranged apically adjacent to the second section, such that to provide axial guiding to the abutment upon the insertion thereof into a dental implant. Further, the invention relates to a dental implant formed in a similar manner.

Abstract: A jaw implant includes an implant body comprising a top end, a base end, an axial line, an acute-angled long side, an obtuse-angled short side, a body core. An oval opening disposed at the top end comprises an opening edge lying in an opening plane inclined with an angle of inclination of 75° to 45° with respect to the axial line so that the implant body has an axial length on the acute-angled long side longer than on the obtuse-angled short side. An external thread structure comprises a lead comprising a lower side facing the base end, an upper side facing the top end, and a wedge angle disposed between the upper side and the lower side. A bisecting line of the wedge angle and the axial line of the implant body form a tilt angle which is smaller on the acute-angled long side than on the obtuse-angled short side.

Abstract: An implant detector cover screw includes a head; an upper recess having a recess provided in the center of an upper part of the head; a lower part having a screw thread provided on the surface thereof below the head; and a projection provided in the upper recess.

Abstract: The invention relates to a template for placing at least one dental implant (7) in a jaw (1) having at least one bore (3) for guiding this implant (7) when it is fixed in the jaw (1), whereby a recess (4) is provided that opens at least partly in said bore (3) in order to enable verifying the position of a implant guide with the implant.

Abstract: A minimally-invasive sinus lift implant and implantation methods are disclosed. An implant apparatus may included an anchor having a distal implant end and an opposite proximal end. The implant apparatus may further include a channel extending though a portion of the anchor and having an outlet opening in the distal implant end. The channel may also include an inlet opening on a side of the anchor between the distal implant end and the proximal end. Further, the inlet opening, the channel, and the outlet opening may be configured to convey fluid therethrough and the implant is configured for implantation in a bone such that when fully implanted, the side inlet opening is buried in the bone.

Abstract: A combination of a dental restoration and a plurality of attachment members is disclosed. The dental restoration includes a plurality of support members configured to be releasably attached to an attachment member. Each attachment member includes a first support surface facing in the coronal direction of the attachment member for supporting a corresponding support member, and a second support surface facing in the apical direction of the attachment member and towards the longitudinal axis of the support member and being configured for engagement with a support surface of a dental fixture. Each attachment member includes an attachment portion at a coronal portion for receiving a fastening member for releasably attaching one of the support members. The first support surface has an angle relative the longitudinal axis of the attachment member measured from its apical towards its coronal end that is larger than a corresponding angle of the second support surface.

Abstract: The invention relates to a dental implant comprising a shaft region (14) facing an apical end, comprising a base form that is substantially cylindrical or tapers down toward the apical end. The shaft region (14) is intended to be anchored in the bone of the patient in the implanted state. The dental implant further comprises a head region (12) adjacent to the shaft region (14) and facing a coronal end opposite the apical end. The shaft region (14) comprises an anchor region (20) disposed in the region of the apical end and a transition region (22) adjacent to the anchor region (20) and extending to the head region (12) in the coronal direction, wherein the boundary between the transition region (22) and the anchor region (20) extends 2 to 5 mm apical to the boundary between the head region (12) and the shaft region (14), and the surface structure of the transition region (22) is different from the surface structure of the anchor region (20).

Abstract: A dental implant fixing system including an implant having a cylindrical main body with a thread division outside; characterized in that the end part of said thread division has a conical shape, narrowing from top to bottom, a recessed conical screw set on the center of the end front and wherein the wall of said conical screw and the outer side of said end part approach each other inclined at bottom.

Abstract: Disclosed are a fixture for a dental implant and an implant system comprising the same. The implant system of the present invention comprises: a first fixture having a first body part and a first continuous screw part which is formed in a spiral around the outer circumferential surface of the first body part and is formed continuously without a break; and a second fixture having a second body part that is identical to the first body part, and a second continuous screw part which is formed in a spiral around the outer circumferential surface of the second body part and which has an outer diameter that differs from that of the first continuous screw part. The present invention allows implant operations to be carried out in a more straightforward fashion than hitherto since, even if initial fixture placement fails, a subsequent fixture can be placed straight away without any further drilling work.

Abstract: A dental implant can comprise a shaft defining a longitudinal axis and having an apical end, a coronal end, and an exterior surface. A portion of the exterior surface can include a porous material. The dental implant can comprise at least one thread, including a non-porous material, having an interior surface and a bone-engaging surface. The interior surface can engage and wind around the exterior surface of the shaft and the bone-engaging surface can extend outwardly from the exterior surface of the shaft. The shaft can include one or more channels configured to communicate a flowable material, stored within the shaft, to the exterior surface. Each channel can include an opening at the exterior surface to release the flowable material. At least one channel can extend between a cavity of the shaft and the exterior surface and can optionally be angled toward the apical end.

Abstract: A bone implant includes a head and a core body extending from the head to a tip. Multiple osteotomy blades extend outwardly from at least a portion of the core body, arranged end-to-end to form a spiral thread. The implant, and particularly the osteotomy blades, are configured to self-osteotomize and channel cut bone between the blades and facilitate bone growth and grafting and integration of the implant to the bone.

Abstract: A dental implant system for promoting osseointegration comprises an implant in cylindrical shape having a thread division at bottom, which can be screwed in the oral alveolar bone of a patient at the location of the implant: where the implant has a neck part on top being located at the same level as the cortical bone of the alveolar bone, as the implant is screwed in the alveolar bone; characterized in that: the surface of the neck part has uneven lines, of which the gapes keep the bone blood on the neck part surface and therefore promote cortical bone growing.

Abstract: A dental implant comprises an implant screw (1) with an external thread (5), an implant abutment (3) and a tightening screw (4) which can be screwed into the implant screw (1) and by which the implant abutment (3) is connectable or connected with the implant screw (1), wherein the implant screw (1) rests against a contact surface (14, 15) of the implant abutment (3) with a contact surface (10, 11). To improve such dental implant, the implant screw (1) and the implant abutment (3) are made of a ceramic material at least in the region of their contact surfaces (10, 11; 14, 15). The contact surface (14, 15) of the implant screw (1) and the contact surface (14, 15) of the implant abutment (3) are ground in against each other.

Abstract: A dental implant is provided. In some embodiments, the dental implant facilitates viewing an outside of a distal end thereof via a proximal opening thereof, and/or facilitates providing bone graft material via selectively closable one or more distal openings. A dental implant installation procedure is also provided in which a distal end of a dental implant is projected into a paranasal sinus cavity or a nasal cavity to thereby displace the respective sinus membrane or nasal cavity membrane from the respective cavity floor, while minimizing risk of damaging the respective membrane. Bone graft material is introduced into the space thereby created between the respective membrane and the respective cavity floor via a distal portion of the dental implant to thereby form a desired sinus augmentation.

Abstract: Dental implant devices, kits, and methods for implantation or use in a bone cavity, are disclosed. A dental implant can include a body portion, extending from a proximal end to a distal end along a longitudinal axis, including a central bore extending from the proximal end to a termination point, located proximal of the distal end. The dental implant can further include and one or more channels extending between the central bore and an exterior surface of the body portion. A kit can include a set of different sized dental implants, a set of slugs including a resorbable material, and optionally, an injection tool. A method can include inserting the dental implant into a bone cavity, introducing a resorbable material into the central bore of the body portion, and permitting the resorbable material to flow from the central bore, through the one or more channels, and into the bone cavity.

Abstract: A method in the preparation of a dental restoration, in which the dental restoration has an implant unit and a head structure interconnectible with one another, comprises the steps of providing an auxiliary material, providing a computerized head receiving surface representation (A?), manufacturing from the auxiliary material a measuring element having a measuring surface (M) and an implant unit coupling surface (X). The measuring surface (M) is adapted such that it can be captured by an optical measuring device, and the measuring element coupling surface (X) is adapted for mating with the head receiving surface (A). The method may help making the preparation of a dental restoration more time and cost efficient.

Abstract: It is the purpose of the implant system according to the invention to reduce the danger of the entry of infections into the implant and to achieve a simplification relative to the structural components that are used. An implant system is disclosed in which during the first process step of the insertion of the implant base, a gingiva former is already mounted on this base by means of an inside screw. This means that the basic starting component is the implant with a gingiva former that is already attached to the implant for screwing into the jaw. The gingiva former now has—both via a special shaping—the anti-rotation, positive contact with the implant threading and a top-side accommodation with inside shaping, which makes it possible to mount a screw tool into this gingiva former.

Abstract: A winged implant is provided with at least one wing member extending generally radially outwardly away from the implant body adjacent a distal end thereof. The external periphery of the implant body is provided with external threads for cutting into, and embedding the implant body within, a substrate, and the diametrical extent of the wing member is substantially larger than the diametrical extents of the implant body and the external threads so as to provide enhanced stabilization for the implant body when implanted within the substrate.

Abstract: A dental implant device for insertion into a bore defined in bone for use with a prosthetic tooth or dental appliance includes an abutment with a plurality of male keys disposed about the distal end of the abutment capable of being affixed to the prosthetic tooth or dental appliance, an implantable anchor having a proximal and distal end, a plurality of female keyways defined into the proximal end of the anchor, the keyways capable of coupling to the male keys of the abutment and thereby preventing relative rotation of the abutment and anchor; an interlocking thread helically defined around a longitudinal axis of the anchor, the thread being adapted to couple to the bore defined in the bone and elements for coupling the abutment to the implant anchor.

Abstract: A bionic dental implant includes a main root (1), a basal platform (2) and a platform bolt (3). The main root (1) includes a fixing root part (11), a neck part (12) located on the upper end of the fixing root part (11), and a mounting channel (13) located inside the main root (1). An aperture (21) is provided inside the basal platform (2). The platform bolt (3) communicates with the aperture (21) to make the basal platform (2) to be fixed on the main root (1). The main root (1) also includes at least one subsidiary root (4). The main root (1) has the same number of inclined holes (14) as the subsidiary root. The inclined holes (14) form a sharp angle with respect to the mounting channel (13) and communicates with it. The upper ends of the subsidiary roots (4) are fixed inside the inclined holes (14) of the main root.

Abstract: A ceramic implant, in particular a dental implant, is provided, which has a ceramic, endosseous surface region, in other words, which is to say a region that is intended to be embedded into the bone tissue and that is made of a ceramic material. The surface region has at least one first zone having a surface modification, in which first zone the surface is roughened or porous, and at least one second zone, in which the surface is not roughened or porous.

Abstract: An abutment (2) connects with a fixture (1) by a Morse-taper type coupling, with the installation of a truncated-cone shank (21) of the abutment (2) into a corresponding cavity (11) exhibited by the fixture (1). The abutment (2) is provided with an appendix having a polygonal cross-section (22), and is positioned below the shank (21). The appendix is fitted into a corresponding impression (12) provided in the bottom of the cavity (11) of fixture (1). The abutment is also provided, on the side opposite to the appendix (22), with respect to the shank (21), with a portion (20, 24) intended for supporting a dental prosthesis (D). The appendix (22) can be rotated about its longitudinal axis, relative to the shank (21) of the abutment (2).

Abstract: An implant for anchoring a tightly fitting prosthesis includes an externally threaded implant body configured to be screwed into bone using an insertion tool, the body having a first end and a second apex end, said first end being provided with an internal open ended axial bore, the implant being tapered such that the apex end is smaller in diameter than the first end where the taper is not greater than 2°. The implant is also provided with an incremental cutting face.

Abstract: A dental implant is provided for supporting a dental prosthesis. The implant can comprise a body having an outer surface, a distal end, and a proximal end. The dental implant can include at least one thread located on at least a portion of the outer surface of the body. The thread can include a proximal flank and a distal flank. The thread can also include a face that extends between the proximal flank and the distal flank. Further, the dental implant can include a first helical groove formed on the face and/or a second helical groove formed on the body.

Abstract: The invention relates to an implant (10) serving to receive an abutment (110). The implant (10) has a receiving opening (15) in which a connection region (115) of the abutment (110) can be inserted. The receiving opening (15) and the connection region (115) have a conical section (17) or (117) and an indexing section (18) or (118). The total conical angle equals 6 to 20° and the indexing length f of the implant (10) or the indexing length F of the abutment (110) equals at least 90% of the conical section length k of the implant (10) or of the conical section length K of the abutment (110), typically more than 1.6 mm.

Abstract: A zirconium oxide dental implant is manufactured by injecting a zirconium oxide paste in a mold for obtaining a green body and sintering the green body to be the zirconium oxide dental implant. The green body is formed integrally with a first external thread section, a first none-thread section, a second external thread section, second none-thread section, wherein the first external thread section and the second external thread section are formed on the peripheral of the green body and divided by the first none-thread section and the second none-thread section. The mold may include at least a first molding part and a second molding part. The first molding part has a first imprinting inner surface for forming the first external thread section of the green body, and two none-thread inner surfaces for forming a half portion of the first none-thread section and the second none-thread section of the green body respectively.

Abstract: An implant is provided with an upper portion in which an internal socket extends. The implant can be tightened by a turning instrument which has first lateral surfaces that can cooperate with corresponding second lateral surfaces in the internal socket. One or more of the first and/or second lateral surfaces is/are arranged completely or partially with friction-enhancing means. The implant and the tool are arranged with interacting parts which extend beyond the first and second lateral surfaces and completely or substantially take up bending moments which act in or on said portion or are directed toward said portion and occur in the event of skewing, or a tendency toward skewing, between the implant and the tool. The arrangement counteracts mechanical stresses in said portion, the latter being able to retain its original shape even in the case of implants with small dimensions.

Abstract: 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.

Abstract: A dental implant system is described, including a lower implant body configured to be implanted in bone, and an upper implant body that couples to the lower body, thereby forming a cavity between upper and lower bodies. The system can further include a rotatable, swivelable anchor having a base at least partially disposed within the cavity. The anchor may have a shaft coupled to the base and extending through an opening in the upper body. The system may also include an abutment that couples to the shaft of the anchor and serves as a mounting area for a crown. The anchor's rotatability and swivelability allow the lower implant body to be implanted at an angle in bone while permitting the crown to be positioned in a natural tooth orientation.

Abstract: A dental implant includes a threaded fixture, at least a portion of which is configured for implantation into bone in a patient's jaw, and an abutment configured for coupling to the threaded fixture, at least a portion of which is configured to remain above the patient's gum line. The threaded fixture and/or the abutment are configured to receive torque from a complementarily shaped torque-transmitting tool. A method for inserting a dental implant into a patient includes (a) implanting at least a portion of a threaded fixture into a hole in a patient's jawbone configured for receiving the threaded fixture; (b) inserting an abutment into the threaded fixture, where at least a portion of the abutment is configured to remain above the patient's gum line; and (c) applying torque to a first part of the dental implant while simultaneously applying counter-torque to the threaded fixture and/or the abutment.

Abstract: A titanium 6 Al/4V alloy is provided with a surface topography that is similar to the Osseotite® surface produced on commercially pure titanium. Native oxide is removed from the Ti 6Al/4V alloy, followed by contacting the metal at ambient temperature with an aqueous hydrochloric acid solution containing a relatively small amount of hydrofluoric acid.

Abstract: Provided are a method of manufacturing a fixture of a dental implant with an improved structure in which the performance of osseointegration is excellent, spread of inflammation is reduced and a combination force between the fixture and an alveolar bone is remarkably increased, and a fixture of a dental implant manufactured by the method. The performance of osseointegration is excellent, and spread of inflammation can be reduced, and a combination between the fixture and an alveolar bone can be remarkably improved. Furthermore, the fixture of the dental implant having the above structure can be easily manufactured.

Abstract: The present invention relates to a method of inserting an implant in a bone. In the bone, a thin slit is formed by a cutting tool in a mesiodistal direction around an insertion spot of the implant. The thin slit is cut and widened by a bone chisel. Into the implant insertion spot, a tool for forming cavity provided with a needle portion is squeezed while being rotated, and a cavity is formed. In the formed cavity and the slit, blood of a patient is collected, by which a tissue is rapidly regenerated and bonded to the inserted implant, and the implant is firmly fixed to the bone.

Abstract: The present invention relates to a fixture for insertion into a bore hole arranged in bone tissue, comprising a threaded leading portion and a threaded trailing portion located coronally of the leading portion.

Abstract: A fixture for insertion into a bore hole arranged in bone tissue is provided. The fixture has a threaded leading portion provided with at least one cutting edge for creating a female thread in the bone tissue, and a threaded trailing portion following the leading portion in the created female thread. Compared to the geometry of a thread peak of said cutting edge of the leading portion, a thread peak of the trailing portion is displaced or overdimensioned in at least one of the coronal and apical directions of the fixture so that a strain is provided to the bone when said displaced or overdimensioned thread peak engages with the created female thread. A fixture set for creating a strain is also provided, the set comprising a fixture and a separate thread maker.

Abstract: The invention relates to a device intended for connecting a prosthesis to a dental implant or directly to the jawbone of a patient, of the type including a pier (1) provided with a frustoconical head (13) with a half-cone angle (A) and a linking capsule (3) provided with a frustoconical cavity (31) suitable for receiving said head. The device according to the invention is essentially characterised in that the value of the angle (A) is equal to that of the angle (B), which corresponds to the maximum angle of an implant belonging to a single jaw, such that the cone distances of the conical portions of any pair of heads (13) and capsules (3) belonging to a single prosthesis (4) are never undercut relative to the path of insertion (Z) of said prosthesis, only using a single type of capsule and not having to observe any specific location or angle for each pier or each capsule during prosthesis implantation.

Abstract: The present invention relates to a fixture, such as a dental fixture, for insertion into a bore hole arranged in bone tissue, comprising a threaded leading portion and a threaded trailing portion located coronally of the leading portion. By a widened threading at the trailing portion, the bone tissue is subjected to a static strain beyond the yield strain of the bone tissue. The invention also relates to a fixture set and to a method of insertion of a fixture into a bore hole arranged in bone tissue.

Abstract: The invention relates to a fixture, such as a dental fixture, for insertion into a bore hole arranged in bone tissue. The fixture has two condensation portions which may be designed to provide the same or different tensile strain levels to the cortical and cancellous bone tissue, respectively. The invention also relates to a thread maker for making a female thread in bone tissue prior to insertion of a fixture. The invention further relates to a fixture set, comprising a thread maker and a fixture.

Abstract: A dental implant system includes a base member that is adapted to be embedded within a patient's jawbone at a treatment site. The base member has a generally flat top side defining an outer periphery, a bottom side, a central opening, and at least one screw hole positioned between the central opening and the outer periphery. The system also includes an implant screw that is adapted to pass through the central opening of the base member and into the patient's jawbone. The system further includes a securing screw that is smaller in size than the implant screw and has a head and a threaded end. The threaded end of the securing screw passes through the screw hole of the base member and into the patient's jawbone.

Abstract: The invention concerns a method for manufacturing a bone superstructure (4) and a dental implant system with an implant (5) and a bone superstructure (4) to at least partly fill bone defects (2) in a jaw (1), whereby the bone superstructure (4) has a bone side (11) which is intended to extend opposite the bone which surrounds said bone defect (2) and a free side (10) onto which the gingiva (9) should connect, whereby this bone superstructure (4) has at least one recess (6) with a circular cross section extending between said bone side (11) and said free side (10), which recess (6) has a conical wall (8) and whereby the implant (5) is conical over at least a part (14) of its height, such that it can be mounted in the recess (6) in a substantially fitting manner.

Abstract: A system and method for applying a uniform micro-textured surface treatment to a deep-thread dental implant by rapidly modulating the focal point of a laser to laser etch surfaces of both the thread peaks and the thread valleys in a single pass.

Abstract: Method and kit for producing implant drilling guides positioned at the proper orientation to avoid inadvertent damage to critical regions of the patient's jaw when drilling to place dental implant screws. The method works by placing a small post device with x-ray visible depth markers in the root socket of the patient's tooth immediately after tooth extraction. The post device may additionally be configured to guide the drill at a position and angle that is different from that of the original tooth socket. This post device is used to construct a removable guide that anchors to the patient's adjacent teeth, and preserves the location and orientation of the extracted tooth root. Once the root socket is filled in with new bone, the guide, in conjunction with the X-ray post depth information, can be used to direct drilling along the same route as the old tooth root, thus avoiding critical structures.

Abstract: Dental implant, comprising a central body (1) with a substantially conical or frustoconical shape and having, extending from the end with a larger cross-section, a connection seat (701) able to receive a stump pin; this central body (1) is provided with a blade (2) positioned in a longitudinal mid-plane of said central body (1) and has a length so as to protrude beyond the end of said central body (1) which has a smaller cross-section; said central body (1) and said blade (2) are able to give the implant a substantially wedge-like form able to expand the bone during insertion.

Abstract: Implant (10) having a shaft which is adapted in use to be embedded in bone tissue and which has an outer surface provided with a circumferentially-oriented roughness. The circumferentially-oriented roughness has first and second axial sections (19, 21) with each section comprising a series of circumferentially-oriented peaks which have a crest and which are axially spaced apart by troughs. The axial spacing (d) between the crests of adjacent peaks in the first axial section (19) is less than the axial spacing (3d) between the crests of adjacent peaks in the second axial section (21). Although the axial spacing between the crests of adjacent peaks in the first and second axial sections of circumferentially-oriented roughness differs, the first and second axial sections of circumferentially-oriented roughness are adapted in use to provide the same or substantially the same pitch.

Abstract: A dental implant apparatus consisting of an auger-like lower threaded portion that is screwed into the bone. It includes a divergent intermediate collar with mini-threads for engaging the cortical bone, and a tapered abutment for fixed tooth replacement or a ball-like snap attachment to secure removable dentures. The apical end of the device has a tapered portion with a blunt tip that condenses the medullar bone, which in combination with the divergent collar engaging and wedging into the cortical bone, provides a dual stabilization structure that can be immediately loaded or placed in light function by cementing on a temporary crown or bridge or by lightly attaching a removable full or partial denture.

Abstract: Provided are a fixture of a dental implant and a method of manufacturing the same, and more particularly, a method of manufacturing a fixture of a dental implant easily that allows fast bone formation at an early stage and prevents infection and inflammation, and a fixture of a dental implant having an improved structure that can be manufactured by using the method of manufacturing the same. The fixture of a dental implant with an improved structure in which the performance of osseointegration is excellent and spread of inflammation is reduced, and the method of manufacturing the fixture of a dental implant easily are provided. In the method of manufacturing a fixture of a dental implant, the fixture of the dental implant in which the performance of osseointegration is excellent and spread of inflammation can be reduced, can be easily manufactured. Furthermore, in the fixture of the dental implant, the performance of osseointegration is excellent and spread of inflammation can be reduced.

Abstract: The present invention relates to a dental implant assembly, comprising a fixture for insertion into a jawbone which is provided with a first thread with a first thread start, and a dental component which is not axially symmetrical and which is provided at its apical end with a second thread with a second thread start having a rotational position which is known in relation to the asymmetrical shape of the dental component for engagement with the first thread.

Abstract: A dental implant is provided having a longitudinal axis, and comprising an elongate body portion at an apical portion of the implant and a neck portion at a coronal portion of the implant. A first helical thread profile is around a first portion of the elongate body, at the apical portion. A second helical thread profile that is different from the first helical thread profile, is around a second portion of the elongate body that is between the first portion and the neck portion. The implant further comprises a third helical thread profile that is around the neck portion and that is different from both the first and second helical thread profiles. Other applications are also described.