A three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one grey value image of the tooth and/or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and/or simulation of one or more root canal treatments on the computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and/or quantitative information by the system in order to aid in adequately analyzing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.
G16H 50/50 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for simulation or modelling of medical disorders
A61C 5/40 - Implements for surgical treatment of the roots or nerves of the teethNerve needlesMethods or instruments for medication of the roots
G06T 19/20 - Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
An instrument for drilling dental root canals includes a tapered rod having over at least a part of its length—the active part—a polygonal cross-section forming at least two cutting edges, the active part terminating by a point and being defined by an envelope of cylindrical or conical shape, whose longitudinal axis coincides with the instrument's axis of rotation. The active part has a first portion extending from the point and a second portion extending following the first portion towards the rear of the active part. At least one cross-section of the first portion has a center of mass located on the axis of rotation and the cutting edges are located on the envelope. Any cross-section of the second portion has a center of mass offset with respect to the axis of rotation and at least one cutting edge defined by the cross-section is located set back.
The invention proposes a set of a first and a second preparation which are intended to be mixed before or during an endodontic treatment to form an endodontic irrigation solution. The first preparation comprises an oxidising agent. The second preparation comprises antibacterial nanoparticles treated to slow their oxidation by the oxidising agent. The antibacterial nanoparticles are, for example, encapsulated in shells in a hybrid core-shell structure. In one variation, the antibacterial nanoparticles are made from an alloy of at least two elements, one of the elements being more resistant to oxidation than the other.
A set of a first and a second preparation are intended to be mixed before or during an endodontic treatment to form an endodontic irrigation solution. The first preparation includes an oxidizing agent. The second preparation includes antibacterial nanoparticles treated to slow their oxidation by the oxidizing agent. The antibacterial nanoparticles are, for example, encapsulated in shells in a hybrid core-shell structure. In one variation, the antibacterial nanoparticles are made from an alloy of at least two elements, one of the elements being more resistant to oxidation than the other.
A01N 25/00 - Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of applicationSubstances for reducing the noxious effect of the active ingredients to organisms other than pests
A computer based method and system for defining and representing a shape and geometry of an occlusal access cavity to the tooth roots prior to endodontic treatment, include the step or elements for: loading onto the computer information of the geometry of a tooth obtained via one or more imaging techniques, creation of a 3D computer model of the tooth, including its internal architecture, visualization of the computer model, visualization of the location(s) of the entrance(s) to root canal(s) relative to the tooths occlusal surface, and based on the locations of the root canal orifices a shape of the access cavity is calculated.
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
A61C 5/02 - Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
G06T 19/20 - Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
A61B 19/00 - Instruments, implements or accessories for surgery or diagnosis not covered by any of the groups A61B 1/00-A61B 18/00, e.g. for stereotaxis, sterile operation, luxation treatment, wound edge protectors(protective face masks A41D 13/11; surgeons' or patients' gowns or dresses A41D 13/12; devices for carrying-off, for treatment of, or for carrying-over, body liquids A61M 1/00)
A61B 5/055 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fieldsMeasuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
G06F 19/12 - for modelling or simulation in systems biology, e.g. probabilistic or dynamic models, gene-regulatory networks, protein interaction networks or metabolic networks
A three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one grey value image of the tooth and/or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and/or simulation of one or more root canal treatments on the computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and/or quantitative information by the system in order to aid in adequately analyzing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.
G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
A device for endodontic treatment simulation is described including: at least one physical tooth model including pulp chamber and root canals, manufactured by way of layered manufacturing or rapid prototyping techniques and corresponding to a real-life endodontic case. Methods and systems for designing and manufacturing the device are also described.
The invention relates to an instrument for boring dental root canals, comprising a thin rod (1) having, at least over part of the length thereof, called the active part (1b), a polygonal section (4) forming at least two cutting edges (5a, 5b), said active part (1b) ending in a tip (3) and being defined by a cylindrical or conical envelope, the longitudinal axis of which merges with the rotational axis (A) of the instrument. Said active part (1b) has a first portion (1c) extending from the tip (3) and a second portion (1d) following on from the first portion (1c) towards the rear of the active part (1b). Every section (4a) of the first portion (1c) has a centre of mass (ma) located on the rotational axis and said cutting edges (5a, 5b) defined by said section (4a) are located on the envelope (7). Every section (4b) of the second portion (1d) has a centre of mass (mb) that is offset in relation to the rotational axis and at least one cutting edge (5a) defined by said section (4b) is set back inside the envelope (7).
The invention relates to an instrument for boring dental root canals, comprising a thin rod (1) having, at least over part of the length thereof, a polygonal section (4) forming at least two cutting edges (5a, 5b) ending in a tip (3). Said length of the instrument has a first portion (1c) extending from the tip (3) and a second portion (1d) following on from the first portion (1c). At least one section (4a) of the first portion (1c) has a centre of mass (ma) located on the rotational axis. Every section (4b) of the second portion (1d) has a centre of mass (mb) that is offset in relation to the rotational axis and at least one cutting edge (5a) defined by said section (4b) is set back.
The invention relates to an instrument for boring dental root canals, comprising a thin rod (1) having, at least over part of the length thereof, a polygonal section (4) forming at least two cutting edges (5a, 5b) ending in a tip (3). Said length of the instrument has a first portion (1c) extending from the tip (3) and a second portion (1d) following on from the first portion (1c). At least one section (4a) of the first portion (1c) has a centre of mass (ma) located on the rotational axis. Every section (4b) of the second portion (1d) has a centre of mass (mb) that is offset in relation to the rotational axis and at least one cutting edge (5a) defined by said section (4b) is set back.
An apex-locating method and device for determining the depth position of the apex in a dental root canal. It uses a device making it possible to form a circuit including a first probe electrode inserted into the root canal of a tooth, a second electrode in conductive contact with an oral mucous membrane, frequency-generating elements able to produce alternating electrical signals at a number of frequencies, and elements for measuring electrical magnitude of alternating signals in the circuit. Provision is made for exciting the circuit and measuring the levels of magnitude of the alternating signals, respectively at low frequency and at high frequency and for detecting a point of intersection where the two levels measured at low and high frequencies meet and become substantially equal, these frequencies being sufficiently far apart for this point of intersection to exist. This point gives the position of the apex.
An instrument for drilling dental root canals, includes a tapered rod having on at least an active part of its length, at least one helical flute defining at least one helical cutting edge. The instrument also has a helical hollow on a portion of the active part extending as far as the point of the rod. At least one of the edges defined by the helical hollow is coincident with the cutting edge, the hollow reducing the cutting angle of the cutting edge. Any cross-section of the active part has at least one convex side belonging to the helical flute. The closer the cross-section in question is to the point of the rod, the more the curvature at any point of the convex side increases and tends to approximate the curvature of the circumscribed circle of the cross-section and passing via the cutting edge defined by the helical flute.
A method and system are described for 3D digital endodontics characterized in that 3D imaging equipment such as a CT or MRI scanner, ultrasound or the like are used to digitize the infected tooth or teeth, a 3D representation of the root canal system is extracted from the image data and visualized on a computer screen, a surgical template is designed to guide the endodontic instruments to localize the root canal(s) intra-operatively and said guide is manufactured by means of a computer driven system (e.g. milling, rapid prototyping, etc.).
A61C 17/02 - Rinsing or air-blowing devices, e.g. using fluid jets
A61B 6/12 - Arrangements for detecting or locating foreign bodies
A61B 5/055 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fieldsMeasuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
The invention provides a method for 3D planning of the restoration of a tooth. A 3D model of the tooth to be restored is generated on which a root canal treatment is planned or simulated creating a post-treatment 3D model of the tooth. Then, the dimensions of a core build-up to replace missing tooth material in the post-treatment 3D model are determined. A crown restoration is created on the post-treatment 3D tooth. The method then creates a visualization on the post-treatment 3D model of the tooth of a quantitative feedback of the available thickness of the remaining material of the tooth for the restorative crown in order to estimate the risk of fracture of the crown or possible crown perforations. Finally, the method allows selecting or determining an optimal core build-up and sequence of treatment steps for the crown restoration for ensuring tooth strength and successful crown restoration.
G06T 19/00 - Manipulating 3D models or images for computer graphics
G16H 50/50 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for simulation or modelling of medical disorders
18.
A METHOD AND SYSTEM FOR 3D ROOT CANAL TREATMENT PLANNING
A three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one 2D grey value image of said tooth and/or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and/or simulation of one or more root canal treatments on the 3D computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and/or quantitative information by the system in order to aid in adequately analysing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.
G06T 19/00 - Manipulating 3D models or images for computer graphics
G16H 50/50 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for simulation or modelling of medical disorders
19.
A METHOD AND SYSTEM FOR 3D ROOT CANAL TREATMENT PLANNING
A three-dimensional computer model of the patient's tooth, including the pulp chamber and root canals, is created by combining at least one 2D grey value image of said tooth and/or surface information about at least part of the intra-orally visible part of the tooth with a statistical, parameterized shape model of each tooth type (upper or lower incisors, canines, pre-molars, molars) as the patient's tooth to be treated. This allows for planning and/or simulation of one or more root canal treatments on the 3D computer model of the patient's tooth and that the dentist or dental specialist is given qualitative and/or quantitative information by the system in order to aid in adequately analysing the risks related to performing the root canal treatment with the proposed or user-selected endodontic tools.
A61C 5/02 - Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
G06F 19/20 - for hybridisation or gene expression, e.g. microarrays, sequencing by hybridisation, normalisation, profiling, noise correction models, expression ratio estimation, probe design or probe optimisation
A computer based method and system is described for defining and representing a shape and geometry of an occlusal access cavity to the tooth roots prior to endodontic treatment, comprising the step or means for: loading onto the computer informationof the geometry of a tooth obtained via one or more imaging techniques, creation of a 3D computer model of the tooth, including its internal architecture, Visualisation of the computer model, Visualisation of the location(s) of the entrance(s) to root canal(s) relative to the tooths occlusal surface, and Based on the locations of the root canal orifices a shape of the access cavity is calculated.
A61B 34/10 - Computer-aided planning, simulation or modelling of surgical operations
A61C 5/40 - Implements for surgical treatment of the roots or nerves of the teethNerve needlesMethods or instruments for medication of the roots
A61C 19/04 - Measuring instruments specially adapted for dentistry
A61C 19/05 - Measuring instruments specially adapted for dentistry for determining occlusion
G06T 19/20 - Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
G16H 50/50 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for simulation or modelling of medical disorders
22.
METHOD AND SYSTEM FOR ESTABLISHING THE SHAPE OF THE OCCLUSAL ACCESS CAVITY IN ENDODONTIC TREATMENT
A computer based method and system is described for defining and representing a shape and geometry of an occlusal access cavity to the tooth roots prior to endodontic treatment, comprising the step or means for: loading onto the computer information of the geometry of a tooth obtained via one or more imaging techniques, creation of a 3D computer model of the tooth, including its internal architecture, Visualisation of the computer model, Visualisation of the location(s) of the entrance(s) to root canal(s) relative to the tooths occlusal surface, and Based on the locations of the root canal orifices a shape of the access cavity is calculated.
G06T 19/20 - Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
A device for endodontic treatment simulation is described comprising: at least one physical tooth model including pulp chamber and root canals, manufactured by means of layered manufacturing or rapid prototyping techniques and corresponding to a real-life endodontic case. Methods and systems for designing and manufacturing the device are also described.
Instrument for drilling dental root canals, comprising a tapered rod (1) having on at least a part of its length, constituting its active part (1b), at least one helical flute (4) defining at least one helical cutting edge (4a). The instrument also has a helical hollow (5) on a portion (1c) of the active part (lb) of the rod (1) extending as far as the point (3) of the rod (1). At least one of the edges defined by the at least one helical hollow (5) is coincident with the cutting edge (4a) defined by the at least one helical flute (4), the hollow (5) reducing the cutting agle (1) of the cutting edge (4a). Furthermore, any cross - section (6,7,7') of the active part (lb) of the rod (1) has at least one convex side (6a, 7a, 7 'a) belonging to the helical flute (4).
A method and system are described for 3D digital endodontics characterized in that 3D imaging equipment such as a CT or MRI scanner, ultrasound or the like are used to digitize the infected tooth or teeth, a 3D representation of the root canal system is extracted from the image data and visualized on a computer screen, a surgical template is designed to guide the endodontic instruments to localize the root canal(s) intra-operatively and said guide is manufactured by means of a computer driven system (e.g. milling, rapid prototyping, etc.).
A method and system are described for 3D digital endodontics characterized in that 3D imaging equipment such as a CT or MRI scanner, ultrasound or the like are used to digitize the infected tooth or teeth, a 3D representation of the root canal system is extracted from the image data and visualized on a computer screen, a surgical template is designed to guide the endodontic instruments to localize the root canal(s) intra-operatively and said guide is manufactured by means of a computer driven system (e.g. milling, rapid prototyping, etc.).
An apex-locating method and device for determining the depth position of the apex in a dental root canal. It uses a device making it possible to form a circuit including a first probe electrode inserted into the root canal of a tooth, a second electrode in conductive contact with an oral mucous membrane, frequency-generating elements able to produce alternating electrical signals at a number of frequencies, and elements for measuring electrical magnitude of alternating signals in the circuit. Provision is made for exciting the circuit and measuring the levels of magnitude of the alternating signals, respectively at low frequency and at high frequency and for detecting a point of intersection where the two levels measured at low and high frequencies meet and become substantially equal, these frequencies being sufficiently far apart for this point of intersection to exist. This point gives the position of the apex.
The invention relates to an apex-locating method and device for determining the depth position of the apex in a dental root canal. It uses a device that makes it possible to form a circuit comprising a first electrode-probe inserted in the root canal of a tooth, a second electrode in conductive contact with a buccal mucous membrane, frequency generator means capable of producing alternating electrical signals at several frequencies, and means for measuring the electrical magnitude of alternating signals in the circuit. The invention makes provision for exciting the circuit and for measuring the levels of magnitude of the alternating signals (I), respectively, at low frequency (f) and at high frequency (F) and for detecting a crossing point (C1M) where the two levels (If, IF) measured at the low and high frequencies (f, F) meet and become substantially equal, these frequencies (f, F) being far enough apart so that this crossing point (C) exists. This point gives the position (M) of the apex (X).
Apparatus, instruments and equipment for use in dentistry and for dental procedures; dental apparatus, instruments and equipment for use in endodontic procedures; parts and fittings for all the aforesaid goods.
37.
CUTTING INSTRUMENT AND METHODS FOR IMPLEMENTING SAME
The invention relates to a rotary cutting instrument (10, 110) that comprises a barrel (12, 112) having a longitudinal axis (14, 114), and at least one flute (16, 116) and an active part (18, 118). Each active part has a peripheral surface that comprises: a radial cutting edge (20, 120) located at a cutting distance (Rc) from said longitudinal axis, a relieving face (30, 130) located at a relieving terminal distance (Rd) from said longitudinal axis, and a control face (40, 140) located at a penetration control distance (Rp) from said longitudinal axis. These distances meet the following relation: 0 < ﶴp < ﶴd, with ﶴp = | Rc - Rp | and ﶴd = | Rc - Rd |. The invention can be used in the fields of endodontics and jewellery.
Outils et instruments à main entraînés manuellement; fraises
(outils); fraises de bijoutiers; alésoirs; mèches (parties
d'outils); forets; tournevis; trépans; meules. Instruments médicaux et chirurgicaux; fraises, alésoirs,
mèches, forets, trépans pour la chirurgie osseuse;
craniotomes; vis chirurgicales; meules médicales; outils
rotatifs pour la chirurgie; lames et instruments de coupe
pour la chirurgie.
Apparatus, instruments and equipment for use in dentistry and for dental procedures; dental apparatus, instruments and equipment for use in endodontic procedures; endodontic instruments; parts and fittings for all the aforesaid goods.
Apparatus and instruments included in class 10 all for use in dentistry; endodontic motors for use in endodontic procedures; parts and accessories for all the aforesaid goods.
Apparatus, instruments and equipment for use in dentistry and for dental procedures; dental apparatus, instruments and equipment for use in endodontic procedures; parts and fittings for all the aforesaid goods.
Apparatus, instruments and equipment for use in dentistry and for dental procedures; dental apparatus, instruments and equipment for use in endodontic procedures; parts and fittings for all the aforesaid goods.
(1) Burs, reamers and files for use in dentistry; dental implements and accessories namely probes, scrapers, excavators, compacters, mirrors, gingival protectors; endodontic tools and accessories namely posts, anchors, implants and gauges.
TOOLS FOR INDUSTRY-NAMELY, STEEL BURRS, INCLUDING USUAL BURRS, SPECIAL BURRS AND TWIST DRILLS; CARBIDE BURRS; DIAMONDS POINTS; AND VULCANITE BURRS TOOLS FOR DENTISTRY-NAMELY, ROOT CANAL BROACHES AND BARBED BROACHES, REAMERS AND FILES, COLOR-CODED FILES AND REAMERS, ROOT CANAL FILLERS, SILVER POINTS AND GUTTA-PERCHA POINTS; STEEL BURS INCLUDING USUAL BURS, SPECIAL BURS AND TWIST DRILLS; CARBIDE BURS; DIAMOND POINTS; FINISHING BURS; BURNISHERS INCLUDING SMOOTH BURNISHERS AND CORRUGATED BURNISHERS; VULCANITE BURS; STUMP BURS; SURGICAL BURS; STANDARDIZED PINS; HAND INSTRUMENTS FOR DENTISTRY, INCLUDING PROBES, EXCAVATORS, FINISHING FILES AND PROBES; AND SEPARATING POINTS
