Abstract: A device for the replacement of missing bone and inadequate bone level, the device comprising: one or more implant blocks, shaped to fill in gaps in a jaw bone, the one or more implant blocks comprised of one or more layers characterized by a honeycomb-like structure, and one or more apertures separated by one or more raised crests; one or more screws; one or more tooth implants, the tooth implants shaped to fit in the one or more apertures of the one or more implant blocks, and having one or more internal holes in their base; one or more tooth abutments, the one or more tooth abutments including one or more members on a side complementary to the shape of the one or more internal holes of the one or more tooth implants, and a support structure; and one or more crowns, the one or more crowns shaped to fit over the support structure of the one or more tooth abutments.

Abstract: A method for making a rapid prototype of a patient's mouth to be used in the design and fabrication of a dental prosthesis. The method takes an impression of a mouth including a first installation site having a dental implant installed in the first installation site and a gingival healing abutment having at least one informational marker attached to the dental implant. A stone model is prepared based on the impression, including teeth models and model markers indicative of the at least one informational marker. The model is scanned. Scan data is generated from the scanning. The scan data is transferred to a CAD program. A three-dimensional model of the installation site is created in the CAD program. The at least one informational marker is determined to gather information for manufacturing the rapid prototype. Rapid prototype dimensional information is developed.

Abstract: A dental interphase with a mode for the reversible fitting of a prosthetic structure to a dental implant that includes an expander core (2), an activator screw (3) and a connection element (26), wherein the activator screw (3) incorporates an external thread (31) for being attached to the expander core (2) by screwing onto an internal thread (22) in the area of notches (23) to a specific depth, the connection element being intended for being coupled to the expander core (2) by attaching a coupling area (14) incorporated in a complementary coupling area (24) incorporated in the expander core (2) such that, once the activator screw (3) is inserted into the expander core (2) the attachment of the interphase to the implant (6) may be permanent, or it may be reversible, where it can be taken apart.

Abstract: A dental assembly includes a prosthesis having a base and a plurality of artificial teeth, and at least one connecting element coupled to the prosthesis and configured to facilitate coupling of the dental assembly to a patient's oral cavity. The at least one connecting element includes a cylinder with a body having a first end, a second end, and a passageway extending between the first and second ends. The connecting element further includes an opening through a sidewall of the cylinder that is open to the passageway. The slot allows access to a fixation screw positioned in the cylinder from a direction that is angled relative to an axis of the cylinder. A method of making a dental assembly is also disclosed.

Abstract: A fixed hybrid dental attachment assembly is provided. The fixed hybrid dental attachment assembly includes an abutment member, a male member, and a cap. The abutment member has an outer locating surface portion projecting downwardly from an upper end. The male member for attachment to the abutment member has an upper end for engagement within a cap in a recess in a dental appliance, and a continuous, unbroken skirt projecting from the upper end of the male member for engagement over the outer locating surface of the abutment member. The skirt may have a rounded, convex outer surface, and the male member may be constructed from a PEEK material.

Abstract: The present application describes an implant-supported denture device and a method for designing and manufacturing an implant-supported denture device for a patient. A method is described for designing a virtual denture and manufacturing an implant-supported functional fitting replica denture from the virtual denture. An apparatus comprising a functional fitting replica denture is prepared having denture teeth having a fit substantially similar to the final denture. The methods and apparatus described herein reduce the number of visits required to manufacture the final denture.

Abstract: The present disclosure relates to scan gauges, a kit of scan gauges, and methods for facilitating the acquisition of a scan during an intraoral scanning procedure using an intraoral scanner, including: an elongate body having an attachment portion configured to attach the elongate body with an implant in a patient's mouth, the implant having a longitudinal axis, whereby the elongate body is adapted to extend substantially perpendicular to the longitudinal axis of the implant when mounted to the implant; the elongate body having a substantially planar upper surface and one or more side walls extending downwardly away from the upper surface; wherein the upper surface and the one or more side walls are observable in a resulting scan when the intraoral scanner scans the apparatus in a direction perpendicular to the upper surface.

Abstract: A computer-implemented method for modeling a complete tooth of a patient to facilitate dental and/or orthodontic treatment. The method includes generating a first set of digital data representing a clinical crown; generating a second set of digital data representing a plurality of digital tooth models of a particular tooth type each having a first parameterization; processing the second set of digital data to obtain a third set of digital data representing an average tooth model of the particular tooth type having a second parameterization which is less than the first parameterization; fitting the third set of digital data to the first set of digital data to create a set of digital data representing an interim tooth model; and morphing the set of digital data representing the interim tooth model to substantially mimic the anatomical shape of the clinical crown of the first set of digital data.

Abstract: A sleeve for installing a crown on a miniature dental implant. The sleeve has a bore for receiving an abutment on a miniature dental implant. The sleeve has a shape configured and arranged for being received in the bore of a dental crown to prevent dental cement from flowing to the gum line.

Abstract: An orthodontic apparatus (1; 10) is designed with at least one orthodontically effective element (4; 12) and at least one holding element (5; 13) for holding the apparatus (1; 10) on the jaw, whereby the apparatus (1; 10) is designed in one piece. In a method for producing an orthodontic apparatus, an electronic data set is produced for a three-dimensional model (2) of a jaw to which the apparatus is supposed to be attached. Further, a virtual positioning of one or more orthodontic elements (4; 12) of the apparatus on jaw model (2) takes place. An electronic data set of a three-dimensional model (3; 11) of the apparatus is subsequently produced. The apparatus (1; 10) is then produced by an additive and/or removal production method according to the data set of the apparatus model.

Abstract: A dental attachment assembly and method anchors a dental appliance with an implant and has an abutment member attached to the implant, a retention member in releasable snap engagement with the abutment member, and a cap secured in a recess of the dental appliance and in releasable swivel engagement with the retention member to position and secure the dental appliance onto the implant. The cap includes a cavity with a rounded, concave inner surface which engages with the retention member, an interior top surface of the cavity with a concave recess extending radially along an outer periphery of the interior top surface of the cavity to allow for rotation of the retention member within the cap. A central portion of the interior top surface of the cavity surrounded by the concave recess therefore protrudes vertically into the cavity to minimize vertical displacement of the retention member as it rotates.

Abstract: The present invention of a digital dental implant replica for a dental model manufactured with 3D additive technology and a system relates to a digital dental implant replica to simulate the position of the dental implant in a dental model which has been produced by means of 3D printing processes or CAD/CAM systems, providing greater precision and maneuverability with respect to analog systems in the orientation of the implant in the dental model due to a simple retention system which is easy to use and detachable.

Abstract: The present invention provides a dental implant including: a fixture and an abutment including a coupling leg, and the fixture and the abutment are elastically coupled with each other, the dental implant including: a fixture axial hole inner inclined surface in which an inner diameter of an axial hole is gradually and downwardly reduced from a predetermined position of an inner inclined surface of the fixture; a first coupling part formed with a coupling hole at a predetermined position of the fixture; and a first associated coupling part formed with a coupling protrusion complementarily coupled with the first coupling part, wherein when the first associated coupling part is separated from the first coupling part by rotating the abutment, the coupling protrusion upwardly pushes the abutment from the fixture by elastic repulsion with the axial hole inner inclined surface of the fixture, thus the abutment becomes separated from the fixture.

Abstract: A dental implant assembly containing an integrally-formed universal abutment which has a top section, a bottom section integrally joined to the top section, and a passageway extending through these sections. The passageway is formed by different size bores, initially a larger size than decrease in size. The top section of the abutment has a cross-sectional shape substantially like a polygon; the shape is formed by alternating linear and arcuate walls joining to a bottom section having a cross-sectional shape substantially like a polygon.

Abstract: An implant and abutment tooth assembly includes an implant, a rotatable connector, a screw bolt, and a photocurable resin capsule. The implant includes a threaded section and a rotatable adjustment seat, wherein the rotatable adjustment seat has an upper connection portion. The upper connection portion has a groove, two spherical portions, and a receiving trench. The rotatable connector includes a spherical rotation face, two end faces, an abutment, an internal screwing section, and a stepped notch. The screw bolt includes an external screwing section, a rotary head, and a force segment. The external screwing section is screwed with the internal screwing section of the rotatable connector, and the rotary head is movably received in the stepped notch of the rotatable connector. The photocurable resin capsule includes 0.1 g to 0.8 g of light-cured resin and is accommodated in the receiving trench of the implant.

Abstract: A modular support for dental prosthesis is configured for securement to abutments and respective dental implants. The modular support includes connectors releasably engaging respective abutments, collars surrounding respective connectors, vertically spaced planar wings extending from at least one collar substantially parallel to the occlusal plane, and a planar tab extending substantially parallel to the occlusal plane. One end of the planar tab extends between the pair of planar wings to provide an internal reinforcing framework for the dental prosthesis. A method of using the modular support for dental prosthesis is also disclosed.

Abstract: A system for manufacturing a three-dimensional article includes a controller configured to: receive an input file defining a geometry of the three-dimensional article; receive information specifying an interface surface of the article over which the article will fit against a three-dimensional body; slice the geometry; identify intersecting slices that intersect the interface surface; and for the intersecting slices, alter a halftone range along the interface surface. Along the interface surface, the article slidingly engages the three-dimensional body. The sliding engagement can be sufficient to provide a fluid seal along the interface surface.

Abstract: The present invention provides a dental composition that exhibits excellent long-lasting antibacterial activity even as a cured product, and that excels in aesthetic quality with no discoloration occurring in water or in hydrogen sulfide. The present invention relates to a dental composition comprising a platinum nanoparticle (a) uncoated with a colloidal protective material.

Abstract: A support is coupled to an appliance to decrease warpage. The support may comprise a plurality of extensions coupled to the appliance to decrease warpage. The extensions can be coupled to the appliance at one or more of many locations, such as on an occlusal surface, a wall, an edge or an interior of the appliance. In some embodiments, the extensions are coupled to walls of the appliance such as a buccal wall and a lingual wall, and the extensions can be coupled to the walls of the appliance near edges of the walls, such as gingivally facing edges of the walls that are oriented toward the gingiva when the appliance is worn.

Abstract: A system and method include digitally determining a virtual insertion path of a digital dental restoration.

Abstract: The invention relates to an adapter (1, 1?) for attaching a dental superstructure (50) to a dental implant (30). The adapter (1, 1?) comprises a coronal attachment portion (2, 2?) for attaching the adapter (1, 1?) to the dental superstructure (50), an apical attachment portion (4) for attaching the adapter (1, 1?) to the dental implant (30) and an intermediate portion (6) arranged between the coronal attachment portion (2, 2?) and the apical attachment portion (4). The apical attachment portion (4) is a protrusion defining an apical end portion of the adapter (1, 1?) and configured to be received in a corresponding recess (32) of the dental implant (30). The protrusion is rotationally symmetric, so that the adapter (1, 1?) is rotatable relative to the dental implant (30) in the state of attachment of the adapter (1, 1?) to the dental implant (30). Further, the invention relates to a dental assembly comprising the dental superstructure (50) and at least one such adapter (1, 1?).

Abstract: A method of generating a correction plan for a knee of a patient includes obtaining a ratio of reference bone density to reference ligament tension in a reference population. A bone of the knee of the patient may be imaged. From the image of the bone, a first dataset may be determined including at least one site of ligament attachment and existing dwell points of a medial femoral condyle and lateral femoral condyle of the patient on a tibia of the patient. Desired positions of contact in three dimensions of the femoral condyles of the patient with the tibia of the patient may be obtained by determining a relationship in which a ratio of bone density to ligament tension of the patient is substantially equal to the ratio of reference bone density to reference ligament tension.

Abstract: A dental restoration device includes a sleeve having an exterior surface and an interior pocket that is at least partially filled with a dental cement, and a crown having an exterior surface and an interior surface that is mated to the exterior surface of the crown and bonded thereto by an adhesive disposed between the exterior surface of the sleeve and the interior surface of the crown.

Abstract: Taking an intraoral scan of a patient's mouth with existing implants, creating a digital model of the patient's mouth, digitally designing a denture bar based on the digital mouth model, fabricating a physical bar based on the digital bar model, delivering the physical bar into the patient's mouth, capturing records of the patient's mouth and installed physical bar, producing a physical denture and joining it to the physical bar, and delivering the physical denture and bar into the patient's mouth, all in no more than three dental office visits. The step of digitally designing a denture bar typically includes selecting a cement gap for the abutments based on errors in the digital mouth model resulting from the intraoral scan, as well as designing lateral cement ports into the digital bar model. And the step of fabricating a physical bar typically includes using additive manufacturing such as 3D printing.

Abstract: In order to improve manufacturing convenience and precision, the present invention provides a digital denture manufacturing method comprising: a first step of acquiring a three-dimensional work image, on which occlusion information between a target dental arch and an opposing dental arch and implant information of a fixture implanted in the target dental arch are displayed, and preparing a temporary denture in which a binding region formed to correspond to a binding portion profile of an abutment fastened to the fixture is arrayed and arranged; a second step of acquiring an auxiliary scan image for the temporary denture; a third step of acquiring, from the auxiliary scan image, a correction surface image on three-dimensional surface information of an inner surface-side engagement groove of the temporary denture including the binding region; and a fourth step of designing and manufacturing a digital denture having a virtual binding groove corresponding to the position and the shape of the three-dimensional sur

Abstract: A medical adaptor generally featuring an adaptor body extending from a fitment end towards a perch. The adaptor further includes a fitment extending away from the fitment end, and a mortar extending away and integral with the fitment, to terminate at the perch. The adaptor also features a shrinkable collet including a collet face and a collet hole extended from a collet hole towards a collet tail. A collet bolt is threaded into the collet hole such that collet is avoided from getting shrunk and is locked at a desired angular position.

Abstract: An apparatus for installing a dental prosthesis. The apparatus includes a guide stent having one or more apertures. One or more implants have a tip and an abutment end connected by a body. A bridge prosthesis has one or more bores defined therein. A retaining fixture is disposed in the bore of the prosthesis. The bridge prosthesis is attached to the one or more implants via engagement between the abutment end of the implant and the retaining fixture.

Abstract: A denture abutment retention apparatus and a denture including one or more denture abutment retention apparatuses configured to allow the denture to be easily engaged with and secured to a plurality of denture abutments in a user's mouth using sliding motion of the denture from the sides of the plurality of denture abutments.

Abstract: A dental implant for supporting periodontal tissue and the supporting bone is provided. The dental implant includes an implant member with inner canal for insertion into a periodontal bone socket, and an anchoring assembly. The anchoring assembly includes a first fastening element and radially equidistant cylindrical members. The first fastening element engages the implant member within the hollow axial cavity. The root section includes through-holes for radially and forcibly sliding the cylindrical members through them. When the first fastening element apically advances within the hollow axial cavity, the cylindrical members generate an anchoring force to anchor the dental implant.

Abstract: A method of monitoring the degree of fit of an aligner among a series of aligners includes the steps of selecting an aligner in the series of aligners whose fit to a patient's teeth are to be tested to determine its fit with the selected aligner; disposing a nontoxic colored plastic material into the selected aligner; setting the patient's teeth into the selected aligner containing the material; and determining the amount of material disposed onto the interior aligner's surfaces by visual inspection by assessment of the material disposed therein, a good fit being indicated by a minimum of material extruded onto almost all of the interior aligner surfaces and by a light color, and a poor fit being indicated by an excess of material extruded onto one or more locations of the aligner interior surfaces and a dark color.

Abstract: The disclosure of the present application relates to a healing abutment system and its use. The abutment system can include a base part adapted to be coupled to a dental implant via an abutment screw and a healing cap that can be coupled to the base part by a further screw. The healing cap can include features that can be scanned by an intra-oral scanning system or transferred to a physical impression to convey information regarding the position and orientation of the base part.

Abstract: A substantially tubular intermediate attachment part with a first through-hole for attaching a screw-retained dental prosthetic component or a dental tool to a dental implant or to a dental implant analog, extending along a first longitudinal axis between a first end and a second end. Each end is provided with a set of longitudinal fins intended for snap-fitting into the dental prosthetic component or into the dental tool on the one hand and into the dental implant on the other hand.

Abstract: The present invention provides devices and methods for controlled and continuous delivery of drugs into the brain by bypassing the blood brain barrier, without the need for any surgical manipulation of the brain. The respiratory mucosa in the maxillary sinus or in the nasal region is surgically accessed from the oral or maxillofacial region through a window made on the bone overlying the mucosa. The device is used to deliver drugs in a continuous and controlled manner either beneath or above the respiratory mucosa depending on the clinical requirements, drug formulation and the volume of drug used. The drug distributes into the brain from the delivery site by bypassing the blood brain barrier without causing any significant increase of the drug in the peripheral circulation. The device can be used for continuous and controlled drug delivery into the brain by bypassing the blood brain barrier for a number of medical conditions.

Abstract: A dental prosthesis and a process for design and manufacturing, incorporating an overdenture and a dental implant framework that will be designed and manufactured simultaneously.

Abstract: A dental implant system including an implant and an abutment is disclosed. The implant includes a generally cylindrical body, a central axis, a distal end for anchoring in a patient's bone and a proximal end opposing the distal end. The proximal end includes a roughened lateralized surface that surrounds an abutment-engaging region. The lateralized surface is disposed at a negative slope relative to the central axis. The abutment includes an upper portion for supporting a tooth-like prosthesis and a lower portion for engaging the abutment-engaging region of the dental implant. The diameter of the lower portion of the abutment is smaller than the diameter of the implant at its proximal end. The lower portion includes a first surface with a soft-tissue enhancing material. The first surface and the lateralized surface defining a circumferentially extending recess having a V-shaped cross-section for receiving and attachment to the soft tissue.

Abstract: A set of components for dental prosthetic restoration includes a ceramic dental implant having an internal connecting receiving space. An internally threaded insert is added into the internal connecting receiving space of the dental implant, and rotatably indexed. It is held by a fixing part forming an axial abutment opposing an extraction of the internally threaded insert out of the inner connection receiving space.

Abstract: Molds for fabrication of custom and potentially modifiable abutments and impression posts for dental implants with various degrees of angulations (including zero degrees) and various dimensions are provided, with a generally oval shape that expands laterally upwards, a symmetrical or asymmetrical cross-section, and regular surfaces, that are fabricated as one piece, or as two coupling pieces snapping onto each other. Custom abutments achieve the development of a custom gingival emergence profile, three dimensionally, which is potentially modifiable according to the needs of each particular clinical case. Custom impression posts that correspond in dimensions and angulations to the abutments allow the accurate recording and transfer of the developed gingival emergence profile from the mouth onto the working cast, where the final implant prosthesis is fabricated.

Abstract: An implant fixture is disclosed. The implant fixture contains an elongated shaft section, a head section, wherein the head section comprises at least one concave area for bone growth therein, and a protrusion extending from the head section.

Abstract: Devices and methods to perform elevation of the Schneiderian membrane in a safe, easy and minimally invasive manner are described. The devices include a cannula and a balloon. A liquid can be introduced through the cannula inside the maxillary sinus below the Schneiderian membrane to elevate the Schneiderian membrane. The balloon can be inflated through the cannula so the balloon will be expanded inside the maxillary sinus below the Schneiderian membrane while being surrounded by the liquid which was previously introduce inside the maxillary sinus. The expansion of the balloon is safely further elevating the Schneiderian membrane in a controlled amount and location.

Abstract: A resin-retained denture bridge having an improved bonding between a false tooth or teeth of the bridge and a retainer wire of the bridge is provided in the present invention, wherein a coupling recess is formed on a lingual side of the false tooth and a protrusion or an omega-shaped bend is formed on the retainer wire. The protrusion or omega-shaped bend is received in the coupling recess of the false tooth after or prior to a resin being filled in the coupling recess, which is then cured to form a secure engagement, so that the false tooth is bonded to the retainer with the end portions of the retainer wire extending laterally from the false tooth.

Abstract: A dental implant structure includes a fixture fixed to an alveolar bone, an abutment coupled to the fixture and configured to attach an artificial tooth thereto, and a coupling element configured to couple the fixture and the abutment to each other. In the dental implant structure, the fixture includes a lower fixture portion fixed to the alveolar bone and an upper fixture portion coupled to the abutment, a first thread is formed on a part or all of a surface of the lower fixture portion so as to be fixed to the alveolar bone, the lower fixture portion has a shape extending along a rotation axis of the first thread, a second thread is formed on a part or all of a surface of the upper fixture portion, and the upper fixture portion has a shape extending along a rotation axis of the second thread.

Abstract: A pluggable implant is disclosed that is comprising an implant body extending between a distal end and an apical end, and comprising a cavity extending from the distal end towards the apical end, the cavity capable of accommodating a plug insertable from the distal end towards the apical end, such that when the plug is fully inserted and located in its apically-most position, the plug seals the cavity. Moreover, there is a method for plugging a hollow implant is disclosed, the implant comprising an implant body extending between a distal end and an apical end, and comprising a cavity extending from the distal end towards the apical end; wherein a plug is removably inserted into the implant through the cavity from the distal end towards the apical end such that when the plug is in fully inserted position and located in its apically-most position, the plug seals the cavity.

Abstract: An ablation procedure. The ablation procedure may be applied to tooth buds 120 and result in tooth agenesis. The ablation procedure may be applied to lesions or tumors. A tooth bud ablation system for use in a tooth bud ablation procedure that results in tooth agenesis. A method for volume scanning both hard tissues and soft tissues of a patient. A method for manufacturing or fabricating a custom surgical stent 110. A custom surgical stent 110 for use in a tooth bud ablation procedure that results in tooth agenesis, the custom surgical stent 110 for use with an ablation probe tip 108 having a center of ablation 130a.

Abstract: A base for a dental implant system which includes a long cavity which optionally reaches below the implant top and/or allows a significant portion of a superstructure to be inserted into the cavity and possibly held using axial support.

Abstract: A reinforcement bar combination for a direct dental bridge, the reinforcement bar combination including: first and second elongate bars, each of the first and second elongate bars contacting a single occlusal preparation formed in a single abutment tooth and each of the first and second elongate bars having an end positioned on a central pad of a third elongate bar to form a reinforcement scaffold. The first elongate bar is a first elongate torque bar that is optionally bent. The second elongate bar is a second elongate torque bar that is optionally bent.

Abstract: A method is proposed for ascertaining the spatial positions and orientations of at least two implants anchored in a jaw of a patient, said method having the following steps: 1. An adhesive bond aid is produced that bridges the implants and has negative molds of adhesive caps, wherein the negative molds fit on the adhesive caps if these are affixed to the implants, and wherein the negative molds allow a clearance relative to the adhesive caps. 2. The adhesive caps are affixed to the at least two implants in the jaw of the patient. 3. The adhesive bond aid is positioned over the adhesive caps. 4. The clearance between the adhesive caps and the negative molds is filled with adhesive. 5. The adhesive is cured. 6. The adhesive caps are released from the implants. 7. The obtained adhesion key is removed from the patient.

Abstract: A method and system are provided for manufacturing a physical dental model. A virtual model is provided representative of at least a portion of the intra-oral cavity including at least one dental implant implanted therein, and the virtual model includes a virtual portion representative of each dental implant. The virtual spatial disposition of each such virtual portion is determined with respect to the virtual model, corresponding to a real spatial disposition of the respective implant with respect to the intra oral cavity. A physical model is then manufactured based on the virtual model, the physical model including a physical analog corresponding to each implant at a respective physical spatial disposition with respect to the physical model corresponding to the respective virtual spatial disposition of the respective virtual portion with respect to the first virtual model as already determined.

Abstract: The present invention provides a dental implant including: a fixture and an abutment including a coupling leg, and the fixture and the abutment are elastically coupled with each other, the dental implant including: a fixture axial hole inner inclined surface in which an inner diameter of an axial hole is gradually and downwardly reduced from a predetermined position of an inner inclined surface of the fixture; a first coupling part formed with a coupling hole at a predetermined position of the fixture; and a first associated coupling part formed with a coupling protrusion complementarily coupled with the first coupling part, wherein when the first associated coupling part is separated from the first coupling part by rotating the abutment, the coupling protrusion upwardly pushes the abutment from the fixture by elastic repulsion with the axial hole inner inclined surface of the fixture, thus the abutment becomes separated from the fixture.

Abstract: A method of taking a scan of a patient's oral cavity may include providing an anatomical healing cap that can be received within a subgingival void of a given tooth position. The method may also include taking a first scan (e.g., an extraoral scan) of the anatomical healing cap before seating the anatomical healing cap into the subgingival void of the given tooth position, where the anatomical healing cap is coupled to an implant disposed adjacent the anatomical healing cap. Further, the method can involve taking a second scan (e.g., an intraoral scan) of the anatomical healing cap and surrounding surfaces, and then integrating the two scans into an overall oral cavity scan. Reference points from the first scan may be used to align the second scan with the first scan, integrating the two together.

Abstract: A dental implant for insertion in a jaw bone has a receiving opening arranged on a coronal end of the dental implant for an abutment, the receiving opening when viewed from the coronal end having a taper section and an indexing section, the indexing section having at least one outwardly extending groove arranged along a circular circumference, the taper section having a conical angle of less than 3°.