An angled abutment for fixing to a dental implant and to a support and anchoring element of a fixed dental prosthesis, and a kit and method for realising a dental system comprising this abutment

Abstract

Angled abutment (100) for fixing to a dental implant (M) and of a support and anchoring element (A) of a fixed dental prosthesis, and of an assembly kit (20) for coupling the angled abutment (100) with a dental implant (M) outside the mouth of a patient and to enable a subsequent implanting of the dental implant (M) in the mouth of a patient.

Description

[0001] AN ANGLED ABUTMENT FOR FIXING TO A DENTAL IMPLANT AND TO A SUPPORT AND ANCHORING ELEMENT OF A FIXED DENTAL PROSTHESIS, AND A KIT

[0002] AND METHOD FOR REALISING A DENTAL SYSTEM COMPRISING THIS ABUTMENT

[0003] 5 DESCRIPTION OF THE INVENTION

[0004] FIELD OF THE INVENTION

[0005] The present invention relates to the technical sector of dental implantology, with particular reference to the components that are used to realise a fixed dental prosthesis, such as for example a Toronto Bridge.

[0006] 10 In particular, the invention relates to an angled abutment (in technical jargon known as an “abutment”) to be interposed between a dental implant, to be inserted and fixed in a respective hole realised in the mandible or maxilla of a patient, and a support and anchoring element of a fixed dental prosthesis, as well as a kit and a method for realising a dental system for supporting and anchoring a fixed dental

[0007] 15 prosthesis.

[0008] DESCRIPTION OF THE PRIOR ART

[0009] It is known that for fixing and anchoring a fixed dental prosthesis, being for example a Toronto Bridge, a series of components are used, to be fixed and coupled reciprocally to one another so as to define a support dental system on

[0010] 20 which to anchor and fix the fixed dental prosthesis.

[0011] In this regard, dental implants are used (usually in the form of screws), angled abutments and support and anchoring elements (known as turrets) which are reciprocally coupled and fixed in order to create a dental system for supporting and anchoring the fixed dental prosthesis to the mandible or the maxilla of a 25 patient so as to create a dental arch that is complete or partial. Dental implants are destined to be inserted and screwed into a special hole made, for example using a milling tool or other instrument, at stuiable areas of the mandible or the maxilla of a patient where it is necessary to re-create, with the fixed dental prosthesis, a dental arch that is complete or partial.

[0012] A dental implant (80), see for example figures 5A and 5B, usually comprises an externally-threaded body (8), having a distal end (81 ), with a generally truncoconical shape, and a proximal end (82) which is accessible externally when the dental implant (80) is inserted in the hole.

[0013] A coupling seat (83) having a polygonal shape is present in the proximal end (82), for example hexagonal or dodecagonal.

[0014] A threaded axial blind hole (85) is axially present internally of the dental implant (80) (see figure 8), coaxial to the coupling seat (83).

[0015] Once the dental implant has been implanted in the mandible or maxilla of the patient, a suitable angled abutment is destined to be coupled to the dental implant at the coupling seat present in the proximal end of the dental implant and fixed thereto by means of a suitable fixing screw.

[0016] A support and anchoring element for the fixed dental prosthesis is then destined to be coupled and fixed to the angled abutment.

[0017] A known angled abutment (90), as illustrated in figures from 1 to 4, comprises a main body (9), a first end portion (91 ), which extends axially from a first end (93) of the main body (9), and a second end portion (94) which extends angularly from a second end (92) of the main body (9).

[0018] The angled abutment (90) further comprises an axial through-hole (95) which extends axially through the main body (9) and through the first end portion (91 ), and a threaded hole (96) which extends along the second end portion (94) according to an inclined extension axis with respect to the axial axis of the axial through-hole (95).

[0019] The first end portion (91 ) is conformed in such a way as to externally form a polygonal coupling profile (910) (for example hexagonal or dodecagonal) having a complementary shape to that of the coupling seat (83) having a polygonal shape present in the proximal end (82) of the dental implant (80).

[0020] Once the dental implant (80) has been implanted in the desired position, the angled abutment (90) is coupled to the dental implant (80) following the positioning of the first end portion (91 ) in the coupling seat (83) present in the proximal end

[0021] (82) of the dental implant (80) (see figures 9A and 9B).

[0022] The coupling takes place following the reciprocal angular coupling between the polygonal coupling profile (910) of the angled abutment (90) and the coupling seat

[0023] (83) having a polygonal shape of the dental implant (80).

[0024] Once this coupling has taken place, the angled abutment (90) is fixed to the dental implant (80) following the insertion of a fastening component (F1 ) through the axial through-hole (95) of the angled abutment (90) and the screwing-in of the fastening component (F1 ) into the threaded axial blind hole (85) present internally of the dental implant (80), until a part of the fastening component (F1 ) reaches into contact against an abutment wall (950) present annularly along the axial extension of the axial through-hole (95) (see for example figure 8).

[0025] The angulation of the second end portion (94) with respect to the axial axis of the axial through-hole (95) can vary in accordance with operating requirements, i.e. according to the inclination with which the dental implant (80) is implanted and screwed-in to the hole realised in the mandible or maxilla of the patient.

[0026] The angulation is necessary as the various support and anchoring elements which must be then coupled to the angled abutments, once these have been coupled to the various dental implants implanted in the patient’s mouth, must be parallel to one another in order to enable the correct positioning of the fixed dental prosthesis.

[0027] Therefore, the dentist must have various angled abutments available having different angulations of the second end portion (94) to be used in accordance with the effective inclination with which the dental implant is implanted in the mandible or maxilla of the patient.

[0028] Further, the second end portion (94) of the angled abutment (90) is conformed in a truncoconical shape (940) and comprises an annular abutment wall (97) in order to enable the positioning and the coupling with the angled abutment of a support and anchoring element, once the angled abutment has been coupled and fixed to a dental implant inserted and implanted in a respective hole realised in the mandible or maxilla of a patient.

[0029] A support and anchoring element (86) (also known as a turret) is for example illustrated in figures 6A and 6B.

[0030] The support and anchoring element (86) comprises a shank-shaped body (87) having a substantially cylindrical shape and has an end (88) which comprises a truncoconical coupling seat (89) (see for example figure 8) having a complementary shape to the truncoconical shape (940) of the second end portion (94) of the angled abutment (90).

[0031] The support and anchoring element (86) is also provided with an axial through- hole (860) to allow the insertion of a threaded fastening element (F2) destined to be screwed into the threaded hole (96), present in the second end portion (94) of the angled abutment (90), for fixing the support and anchoring element (96) to the angled abutment (90) (see figure 8).

[0032] Figures 7 and 8 illustrate the dental system (SD) which is obtained following the insertion and screwing-in of the dental implant (80) into a hole realised in the mandible or maxilla (not illustrated) of a patient and of the reciprocal coupling and fixing of the angled abutment (90) to the dental implant (80) and of the support and anchoring element (86) to the angled abutment (90).

[0033] The support and anchoring element (86) also comprises, externally of the shankshaped body (87), a special anchoring profile (870) for enabling the positioning and anchoring of a fixed dental prosthesis (not illustrated).

[0034] An operating sequence which is carried out at present using a known angled abutment, such as the one described in the foregoing, is illustrated in figures from 9A to 9F.

[0035] Once a dental implant (80) has been implanted in the site (S) of interest, internally of a hole previously made in the mandible or maxilla of a patient, leaving accessible, from the outside, the proximal end (82) with the coupling seat (83) having a polygonal shape, an angled abutment (90) is coupled to the dental implant (80) by insertion, and form coupling, of the polygonal coupling profile (910), present in the first end portion (91 ) of the angled abutment (90), into the coupling seat (83) of the dental implant (80).

[0036] The angular position in which the second end portion (94) of the angled abutment (90) will be positioned with respect axial axis to the dental implant (80), i.e. with respect to the threaded axial through-hole (85) of the dental implant (80), will depend on the angular orientation of the coupling between the two polygonal profiles present, respectively, in the first end portion of the angled abutment and in the coupling seat of the dental implant. As the polygonal coupling profiles have a finite number of coupling walls (for example six or twelve), the second end portion (94) can consequently assume predefined angular positions, with no possibility of further and different angular adjustments.

[0037] Once the coupling has taken place, and the second end portion (94) has been positioned substantially in the desired angular orientation, a fastening component (F1 ) is inserted through the axial through-hole (95) of the angled abutment (90) until a threaded portion of the fastening component (F1 ) reaches the threaded axial blind hole (85) internally of the dental implant (80), and then the fastening component (F1 ) is screwed into the threaded axial blind hole (85) until a part of the fastening component (F1 ) reaches into contact against the abutment wall (950) present annularly along the axial extension of the axial through-hole (5) (see for example figure 9C and figure 8).

[0038] Then, the support and anchoring element (86) is coupled to the angled abutment (90) by the positioning of the truncoconical coupling seat (89) present at an end (88) thereof at the position of the second end portion (94) having a truncoconical shape (940) of the angled abutment (90), until a terminal wall of the second end (88) of the support and anchoring element (86) is positioned in abutment against the annular abutment wall (97) of the second end portion (94) of the angled abutment (90) (see figures 9D, 9E and figure 8).

[0039] Lastly, a fastening element (F2) is inserted through the axial through-hole (860) of the support and anchoring element (86) until a threaded portion of the fastening element (F2) couples with the threaded hole (96) present internally of the second end portion (94).

[0040] The second fastening element (F2) is then screwed into the threaded hole (96) until an annular wall thereof reaches into abutment against a portion of annular abutment (960) present annularly along the axial extension of the axial through- hole (860) of the support and anchoring element (86), thus fixing the support and anchoring element (86) to the angled abutment (90), and through the angled abutment (90), to the dental implant (80) (see figure 9F and figure 8).

[0041] In this way, it is possible to obtain a dental system implanted into the mandible or maxilla of the patient to be used, together with other dental systems obtained in the same way, for the application and mounting of a fixed dental prosthesis, being for example a Toronto Bridge.

[0042] The use of angled abutments realised as described in the foregoing, and the carrying-out of the various working step outlined for realising a dental system for supporting and anchoring a fixed dental prosthesis, such as for example a Toronto Bridge, has various drawbacks.

[0043] Firstly, the known angled abutment is completely hollow internally, for the entire axial extension thereof, due to the presence of the axial through-hole (95).

[0044] Further, the second end portion (94), which extends angularly with respect to the axis of the axial through-hole (95), is also hollow, due to the presence of the threaded hole (96).

[0045] This confers a lower degree of strength to the angled abutment, with possible drawbacks relating to the hold of the dental system.

[0046] Further, as for example is clearly visible in figure 4, the threaded hole (96) present in the second end portion (94) has an inclined extension axis with respect to the axial axis of the axial through-hole (95), and consequently the respective thread does not have a complete helical winding.

[0047] This can lead to issues relating to the hold of the fixture of the fastening element (F2) when the latter is screwed into the threaded hole (96) for fixing the support and anchoring element (86) to the angled abutment (80), with consequent negative repercussions on the hold of the fixture and anchoring of the fixed dental prosthesis.

[0048] Further, the angular positioning of the angled abutment on a dental implant already implanted is not so precise and fine, as the possibilities of angular adjustment are determined by the number of faces present in the polygonal coupling profiles of the coupling seat of the dental implant and of the first end portion of the angled abutment.

[0049] Consequently, situations can be created in which the angled abutment, once coupled to the dental implant, is not in the optimal position thereof, a circumstance that can lead to issues of correct alignment with other angled abutments coupled to the remaining dental implants designed for the positioning of a fixed dental prosthesis, partial or complete.

[0050] In these circumstances, the dentist can be forced to intervene on the dental implant, by rotating it with respect to the hole into which it had already been screwed, in order to adjust the angular position thereof, and thus regulate the angular position of the coupling seat present in the proximal end thereof.

[0051] SUMMARY OF THE INVENTION

[0052] The aim of the present invention is therefore to provide a novel angled abutment, for fixing to a dental implant and to a support and anchoring element of a fixed dental prosthesis, able to obviate the problems present in the prior art described in the foregoing.

[0053] Further, another aim of the present invention is to provide a kit and method for realising, using the angled abutment of the invention, a dental system for supporting and anchoring a fixed dental prosthesis.

[0054] The above-mentioned advantages are obtained according to the contents of the claims.

[0055] BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The characteristics of a preferred, but not exclusive, embodiment of the angled abutment of the invention, as well as the kit and method for realising a dental system for supporting and anchoring a fixed dental prosthesis, are described in the following with reference to the accompanying tables of drawings, in which: figures 1 , 2 and 3, already cited in the foregoing, illustrate, according to respective views from different angles, an angled abutment of the prior art as described in the foregoing;

[0057] - figure 4 is a view along section plane l-l of figure 3;

[0058] - figures 5A and 5B, mentioned in the foregoing, illustrate, according to respective views from different angles, a dental implant to which the angled abutment of the prior art of figures 1 , 2, 3, 4 can be coupled and fixed to realise a dental system for supporting and anchoring a fixed dental prosthesis;

[0059] - figures 6A and 6B, mentioned in the foregoing, illustrate, according to respective views from different angles, a support and anchoring element which can be coupled to a known angled abutment as in figures 1 , 2, 3, 4 for realising a dental system for supporting and anchoring a fixed dental prosthesis;

[0060] - figure 7 illustrates, in a schematic frontal view, a dental system obtainable in the prior art, for supporting and anchoring a fixed dental prosthesis, using a dental implant as in figures 5A, 5B, a known angled abutment as in figures 1 , 2, 3, 4 and a support and anchoring element as in figures 6A, 6B;

[0061] - figure 8 is a view along section plane I l-l I of figure 7; - figures from 9A to 9F, mentioned in the foregoing, illustrate an operating sequence that at present is carried out for realising a dental system using the angled abutment of the prior art as described in figures 1 , 2, 3 and 4 and the dental implant as in figures 5A, 5B, and the support and anchoring element as in figures 6A, 6B;

[0062] - figures 10, 11 and 12 illustrate, schematically, and according to respective views from different angles, the angled abutment object of the present invention for realising a dental system for supporting and anchoring a fixed dental prosthesis; - figure 13 is the view along section plane Ill-Ill of figure 12;

[0063] - figure 14 is a partial perspective view of an end portion of the angled abutment of the invention;

[0064] - figures 15 and 16 illustrate, schematically and according to respective views from different angles, an assembly component usable for realising, with the angled abutment of the invention, a dental system for supporting and anchoring a fixed dental prosthesis;

[0065] - figure 17 is a partial perspective view of an end portion of the angled abutment of the assembly component of figures 15 and 16;

[0066] - figure 18 illustrates, in a schematic frontal view, the assembly component of figures 14-17, coupled to the angled abutment of the invention and forming a kit for fixing the angled abutment to a dental implant and for realising a dental system for supporting and anchoring a fixed dental prosthesis;

[0067] - figure 19 is a view along section plane IV-IV of figure 18;

[0068] - figures 20A and 20B illustrate, according to respective views from different angles, a dental implant to which the angled abutment of the invention can be coupled and fixed for realising a dental system for supporting and anchoring a fixed dental prosthesis;

[0069] - figures 21 A and 21 B illustrate, according to respective views from different angles, a support and anchoring element which can be coupled to the angled abutment of the invention for realising a dental system for supporting and anchoring a fixed dental prosthesis;

[0070] - figure 22 illustrates, in a schematic frontal view, a dental system for supporting and anchoring a fixed dental prosthesis obtainable using the angled abutment of the invention;

[0071] - figure 23 is the view along section plane V-V of figure 22;

[0072] - figures from 24A to 24H illustrate an operating sequence of an assembly method which can be carried out for realising a dental system for supporting and anchoring a fixed dental prosthesis using the angled abutment of the invention and the kit comprising the angled abutment and the assembly component, a dental implant such as for example the one illustrated in figures 20A and 20B and a support and anchoring element a dental implant such as for example the one illustrated in figures 21 A and 21 B.

[0073] DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0074] With reference to the figures, in particular to figures from 10 to 14, reference numeral (100) denotes, in its entirety, the angled abutment for fixing to a dental implant (M) and to a support and anchoring element (A) of a fixed dental prosthesis, being for example a Toronto Bridge, object of the present invention, in its entirety.

[0075] The angled abutment (100) comprises a solid central body (10) (i.e. solid in the sense that it is not internally hollow) having a first end (11 ) and a second end (12) and an axial axis (H). The angled abutment (100) also comprises a first end portion (2) that is solid (i.e. which is full, i.e. which is not hollow internally thereof), which is threaded and which extends axially starting from the first end (11 ) of the central body (10) and coaxially to the axial axis (H) of the central body (10).

[0076] The first end portion (2) is conformed and dimensioned for inserting and screwing into a threaded blind axial hole (B) present in a dental implant (M) starting from a respective proximal end (MP) (the dental implant (M) illustrated for example in figures 20A and 20B, with the coupling between the first end portion (2) and the threaded blind axial hole (B) being instead visible in figure 23).

[0077] The angled abutment (100) further comprises a second inclined end portion (3) which extends angularly starting from the second end (12) of the central body (10) and which forms a cap (31 ) and an annular abutment wall (32) inferiorly of the cap (31 ).

[0078] The cap (31 ) centrally comprises a threaded blind hole (33) wihch has an inclined extension axis (Z) with respect to the axial axis (H) of the central body (10) and of the first end portion (2).

[0079] The cap (31 ) is conformed to insert in a coupling seat (40) present in a head (41 ) of a support and anchoring element (A) (which is illustrated in figures 21 A and 21 B) of a fixed prosthesis (for example a Toronto Bridge, not illustrated), when a terminal wall (42) of the head (41 ) of the support and anchoring element (A) is placed in abutment against the annular abutment wall (32) of the second inclined end portion (3) (see for example figure 23 in particular).

[0080] The threaded blind hole (33) is conformed so as to receive and couple by screwing with a threaded fastening element (50) inserted through an axial through-hole (45) present internally of the support and anchoring element (A) (see for example figure 23), in such a way that the dental implant (M), the angled abutment (100) and the support and anchoring element (A), when reciprocally coupled and fixed, form a dental system (D) (figures 22 and 23) for supporting and anchoring a fixed dental prosthesis, such as, for example, but not necessarily, a Toronto Bridge.

[0081] Owing to the particular conformation thereof, the angled abutment (100) is much more rigid and sturdy than angled abutments of the prior art, as it has no cavities internally thereof.

[0082] Further, the angled abutment (100) can be inserted and screwed directly into the threaded blind axial hole (B) present internally of the dental implant (M) outside the mouth of the patient to whom a fixed dental prosthesis is to be applied (for example a Toronto Bridge), and therefore well before the dentist carries out a surgical operation.

[0083] In this way, a dental implant (M) - angled abutment (100) assembly can be created which can then be inserted and implanted in a hole realised in the mandible or maxilla of a patient.

[0084] In this way, there will no longer exist the drawbacks present in the prior art related to a correct orientation of the second inclined end portion of the angled abutment, since the angled abutment is already coupled to the dental implant before the dental implant is implanted in the patient’s mouth.

[0085] With a sole rotation of the dental implant, during the insertion and screwing-in to the hole realised in the mandible or maxilla of the patient, it will thus be possible for the dentist to position the second inclined end portion of the angled abutment in the desired position to enable the following positioning of the support and anchoring element of the fixed dental prosthesis.

[0086] On the basis of the position, and inclination, with which the dental implant is to be implanted in the patient’s mouth for the positioning of the fixed dental prosthesis, a corresponding angled abutment will be used with a corresponding inclination and angulation of the second inclined end portion with respect to central body of the angled abutment.

[0087] The angled abutment (100) of the invention will therefore be realised with a second inclined end portion that is inclined with respect to central body at an angle comprised between a range of possible angles on the basis of various possible modes of implanting of the dental implant in the patient’s mouth.

[0088] The angled abutment (100) of the present invention also has the further advantages.

[0089] With respect to “one-piece” implants, in which the angled abutment and the dental implant are monophasic, i.e. in a single piece, the angled abutment of the invention, owing to the coupling modes thereof by means of the screwing onto the dental implant enables, in a case of possible errors committed by the dentist, carrying out the due correction, proceeding to the unscrewing thereof from the dental implant.

[0090] This enables not only the carrying-out of timely and immediate corrections of any positioning errors, but also allows reducing the onset of possible risks and complications during the restoring procedures of the dental implant, obtaining an overall result that is without doubt improved.

[0091] As also mentioned in the foregoing, the angled abutment of the invention does not have through-holes nor requires the use of through-screws internally thereof.

[0092] This enables being able to realise the angled abutment of the invention in dimensions that are compact and decidedly smaller and reduce with respect to the angled abutments of the prior art, as well as to the “one-piece” implants. The compact and small dimensions of the angled abutment of the invention are particularly advantageous, indeed it will no longer be necessary to proceed to removal of bone portions about the site in which the dental implant is implanted in order to create manoeuvring spaces that are such as to enable the positioning and screwing-in of additional components, as happens in the prior art.

[0093] In this way, with the use of the angled abutment of the invention, the integrity of the patient’s bone is preserved as far as possible, thus contributing to a significant increase in the duration of the dental implant.

[0094] Further, there is a significant simplification of the operations that the dentist must carry out in order to carry out the necessary steps for the installation of the dental prosthesis.

[0095] A further advantageous aspect of the angled abutment consists in the fact that the threaded blind hole is made in such a way as to enable use of a threaded fastening element configured to be able to support a screwing-in of up to 35 Ncm.

[0096] Owing to this particularity, it is possible to obtain a mechanical coupling resistance that is significantly greater than in the prior art (in which the locking down of the fastening element is usually up to a maximum of 15 Ncm), thus averting the risk of any future loosening, and consequently ensuring a greater stability and durability over time of the dental prosthesis.

[0097] The modalities with which the angled abutment (100) object of the present invention, can be used will be described in further detail in the following.

[0098] The angled abutment (100), preferably according to a further aspect, is made in such a way that the central body (10) has a cylindrical or truncoconical shape which is conformed in such a way as to insert by form coupling internally of a cavity (E) having a cylindrical or truncoconical shape made in the proximal end (MP) of the dental implant (M) and communicating with the threaded blind axial hole (B) present internally of the dental implant (M).

[0099] In a further preferred aspect, the central body (10) comprises, between the central body and the first end portion (11 ), a part of body (15) which is tapered and which is destined to go into abutment against an annular portion (E1 ) of a bottom of the cavity (E) made in the proximal end (MP) of the dental implant (M), when the first end portion (11 ) of the angled abutment (100) is screwed into the threaded blind axial hole (B) present internally of the dental implant (M) (see figure 23 in detail).

[0100] The present invention further provides an assembly kit (20) for coupling the angled abutment (100) with a dental implant (M) outside the mouth of a patient and to enable a subsequent implanting of the dental implant (M) in the mouth of a patient. The assembly kit (20) comprises the angled abutment (100) of the invention as described in the foregoing, an assembly component (60) and a threaded blocking element (68), reciprocally couplable and fixable to one another.

[0101] The assembly component (60) (see for example figures from 15 to 17) comprises a shank-shaped body (61 ) having an axial axis (V), a first planar end (62) that is transversal to the axial axis (V), and a second end (64), inclined with respect to the axial axis (V).

[0102] A screwing-in seat (63) is present in the first planar end (62), having a suitable shape for receiving, by form coupling, a tip of a screwing-in tool.

[0103] A housing (65) is present in the second inclined end (64), which housing has an axis (K) which is inclined with respect to the axial axis (V) of the shank-shaped body (61 ).

[0104] The housing (65) has an internal lateral wall (650) which is conformed to receive internally thereof the cap (31 ) of the second inclined end portion (3) of the angled abutment (100), with the annular abutment wall (32) of the second inclined end portion (3) going into abutment against the second inclined end (64) of the shankshaped body (61 ).

[0105] The shank-shaped body (61 ) further comprises a transversal hole (66) having an extension axis (N) that is inclined with respect to the axial axis (V) of the shankshaped body (61 ) and coaxial to the axis (K) of the housing (65) and communicating with the housing (65).

[0106] The transversal hole (66) has a shape that is such as to enable insertion of the threaded blocking element (68) to enable the screwing-in into the threaded blind hole (33) of the cap (31 ) of the second inclined end portion (3) of the angled abutment (100) in order to fix the assembly component (60) to the angled abutment (100).

[0107] Figures 24A and 24B illustrate the angled abutment (100) and the assembly component (60) during the steps of coupling and fixing thereof, while figures 18 and 19 illustrate the angled abutment (100) and the assembly component (60) already coupled and fixed to one another by the threaded blocking element (68).

[0108] In this way, once the angled abutment (100) and the assembly component (60) have been coupled to one another, and fixed using the threaded blocking element (68) (figures 24A and 24B), by inserting the tip of the screwing-in tool into the screwing-in seat (63) of the shank-shaped body (61 ), it is possible to screw the angled abutment (100) directly into a dental implant (M) outside the mouth of a patient (figure 24C), and before any surgical operation, following the insertion and screwing of the first end portion (2) of the angled abutment (100) into the threaded blind axial hole (B) present in the dental implant (M) at a respective proximal end (MP) thereof, and then to subsequently be able to implant the dental implant (M) in the patient’s mouth.

[0109] In a further preferred aspect of the assembly kit (20), the transversal hole (66), present in the shank-shaped body (61 ) of the assembly component (60), comprises an annular narrowing (660) destined to form a stop abutment for a head of the threaded blocking element (68), when the threaded blocking element (68) is inserted through the transversal hole (66) and screwed into the threaded blind hole (33) of the cap (31 ) of the second inclined end portion (3) of the angled abutment (100) (figure 19).

[0110] Further, in a particularly advantageous aspect, the shank-shaped body (61 ) of the assembly component (60) comprises notches or marks (67) (see for example figure16) which are positioned on the body of the shank-shaped body (61 ) in such a way as to indicate the position assumed by the transversal hole (66), and thus to indicate the position of the cap (31 ) and therefore of the second inclined end portion (3) of the angled abutment (100), when the assembly component (60) is coupled and fixed to the angled abutment (100).

[0111] The notches or marks (67) will indicate to the dentist the position of the second inclined end portion (3) of the angled abutment (100) during the screwing-in of the dental implant (M) - angled abutment (100) assembly into the hole realised in the mandible or maxilla of the patient, in such a way that the dentist can, simply by rotation of the dental implant (M) internally of the hole, correctly position the second inclined end portion (3) in the desired position to enable the positioning of the support and anchoring element (A) of the fixed dental prosthesis.

[0112] The present invention further provides a method for realising a dental system (D) for supporting and anchoring a fixed dental prosthesis.

[0113] The method comprises: using the angled abutment (100) of the invention as described in the foregoing, using the assembly kit (20) as described herein above, comprising the angled abutment (100) of the invention, the assembly component (60) and the threaded blocking element (68); using a dental implant (M) having a threaded body and comprising a cavity (E) at a respective proximal end (MP) thereof and, internally thereof, a threaded blind axial hole (B) communicating with the cavity (E) (as for example the one illustrated in figures 20A and 20B); using a support and anchoring element (A) comprising a coupling seat (40) located at a respective head (41 ) and an axial through-hole (45) (as for example the one illustrated in figures 21 A and 21 B).

[0114] The method comprises carrying out following steps (see the sequence illustrated in figures from 24A to 24H): coupling the angled abutment (100) to the assembly component (60) by insertion of the cap (31 ), present in the second inclined end portion (3) of the angled abutment (100), internally of the housing (65), present in the second inclined end (64) of the shank-shaped body (61 ) of the assembly component (60), until the annular abutment wall (32) of the second inclined end portion (3) goes into abutment against the second inclined end (64) (figures 24A and 24B); fastening the angled abutment (100) to the assembly component (60) by inserting the threaded blocking element (68) through the transversal hole (66) present in the shank-shaped body (61 ) of the assembly component (60) and the screwing of the threaded blocking element (68) into the threaded blind hole (33) of the cap (31 ) until the head of the threaded blocking element (68) goes into abutment against the annular narrowing (660) present in the transversal hole (66); inserting the threaded first end portion (2) of the angled abutment (100) internally of the threaded blind axial hole (B) of the dental implant (M) (figure 24B); screwing the threaded first end portion (2) of the angled abutment (100) into the threaded blind axial hole (B) of the dental implant (M) by rotating the assembly component (60) by rotation of a tip of a screwing-in tool inserted in the screwing-in seat (63) present in the first planar end (62) of the shank-shaped body (61 ) of the assembly component (60) until the part of the body (15) of the central body (10) of the angled abutment (100) goes into abutment against an annular portion (E1 ) of the bottom of the cavity (E) made in the proximal end (MP) of the dental implant (M) (figure 24C); inserting the dental implant (M) in a hole (BW) realised in an implant site (SW) in the maxilla or mandible (MA) of a patient and screwing the dental implant (M) into the hole (BW) by rotating the assembly component (60) by rotation of a tip of a screwing-in tool inserted in the screwing-in seat (63) present in the first planar end (62) of the shank-shaped body (61 ) of the assembly component (60) until the dental implant (M) is implanted to the desired depth and with the second inclined end portion (3) of the angled abutment (100) remaining projecting and orientated in a desired angular position (figure 24D); removing the threaded blocking element (68) and decoupling the assembly component (60) from the angled abutment (100), leaving the second inclined end portion (3) of the angled abutment (100) accessible (figure 24E); coupling the support and anchoring element (A) to the angled abutment (100) by insertion of the cap (31 ), present in the second inclined end portion (3) of the angled abutment (100), in the coupling seat (40) present in the head (41 ) of the support and anchoring element (A) until a terminal wall (42) of the head (41 ) of the support and anchoring element (A) goes into abutment against the annular abutment wall (32) of the second inclined end portion (3) (figures 24F and 2G); fastening the support and anchoring element (A) to the angled abutment (100) by inserting the threaded fastening element (50) through the axial through-hole (45) present in the support and anchoring element (A) and by screwing the threaded fastening element (50) into the threaded blind hole (33) present in the cap (31 ), so as to obtain a dental system (D) implanted into the maxilla or mandible (MA) of a patient suitable for supporting and anchoring a dental prosthesis (see figure 24H).

[0115] Advantageously, with the method of the invention, which uses the assembly kit (20) comprising the angled abutment (100) of the invention and the assembly component (60) as described in the foregoing, the desired angular position for the correct positioning of the second inclined end portion (3) of the angled abutment (100) is determined and identified by means of the position of notches or marks (67) present in the shank-shaped body (61 ) of the assembly component (60), which are indicative of the position of the cap (31 ) present in the second inclined end portion (3) of the angled abutment (100).

Claims

CLAIMS1 ) An angled abutment (100) for fixing to a dental implant (M) and to a support and anchoring element (A) of a fixed dental prosthesis, wherein the angled abutment (100) comprises: a solid central body (10) having a first end (11 ) and a second end (12) and an axial axis (H); a first end portion (2) that is solid and threaded which extends axially starting from the first end (11 ) of the central body (10) and coaxially to the axial axis (H) of the central body (10), wherein the first end portion (2) is conformed and dimensioned for inserting and screwing into a threaded blind axial hole (B) present in the dental implant (M) starting from a respective proximal end (MP); a second inclined end portion (3) which extends angularly starting from the second end (12) of the central body (10) and forming a cap (31 ) and an annular abutment wall (32) inferiorly of the cap (31 ), wherein the cap (31 ) centrally comprises a threaded blind hole (33) having an inclined extension axis (Z) with respect to the axial axis (H) of the central body (10) and of the first end portion (2), wherein the cap (31 ) is conformed to insert in a coupling seat (40) present in a head (41 ) of a support and anchoring element (A) of a fixed prosthesis, when a terminal wall (42) of the head (41 ) of the support and anchoring element (A) is placed in abutment against the annular abutment wall (32) of the second inclined end portion (3), and wherein the threaded blind hole (33) is conformed so as to receive and couple by screwing with a threaded fastening element (50) inserted through an axial through- hole (45) present internally of the support and anchoring element (A), in such a way that the dental implant (M), the angled abutment (100) and the support andanchoring element (A), when reciprocally coupled and fixed, form a dental system (D) for supporting and anchoring a fixed dental prosthesis.2) The angled abutment (100) as claimed in claim 1 , wherein the central body (10) has a cylindrical or truncoconical shape which is conformed in such a way as to insert by form coupling internally of a cavity (E) having a cylindrical or truncoconical shape made in the proximal end (MP) of the dental implant (M) and communicating with the threaded blind axial hole (B) present internally of the dental implant (M).3) The angled abutment (100) as claimed in claim 2, wherein the central body (10) comprises, between the central body and the first end portion (11 ), a part of body (15) which is tapered and which is destined to go into abutment against an annular portion (E1 ) of a bottom of the cavity (E) made in the proximal end (MP) of the dental implant (M), when the first end portion (11 ) of the angled abutment (100) is screwed into the threaded blind axial hole (B) present internally of the dental implant (M).4) An assembly kit (20) comprising an angled abutment (100) as claimed in any one of claims from 1 to 3, an assembly component (60) and a threaded blocking element (68), for coupling the angled abutment (100) with a dental implant (M) outside the mouth of a patient and to enable a subsequent implanting of the dental implant (M) in the mouth of a patient, wherein the assembly component (60) comprises a shank-shaped body (61 ) having an axial axis (V), wherein a screwingin seat (63) is present having a suitable shape for receiving, by form coupling, a tip of a screwing-in tool, and a second inclined end (64) with respect to the axial axis (V), wherein a housing (65) is present having an axis (K) which is inclined with respect to the axial axis (V) of the shank-shaped body (61 ),wherein the housing (65) has an internal lateral wall (650) which is conformed to receive internally thereof the cap (31 ) of the second inclined end portion (3) of the angled abutment (100), with the annular abutment wall (32) of the second inclined end portion (3) going into abutment against the second inclined end (64) of the shank-shaped body (61 ), wherein the shank-shaped body (61 ) further comprises a transversal hole (66) having an inclined extension axis (N) with respect to the axial axis (V) of the shank-shaped body (61 ) and coaxial to the axis (K) of the housing (65) and communicating with the housing (65), the transversal hole (66) having a shape that is such as to enable insertion of the threaded blocking element (68) in order to enable screwing the cap (31 ) of the second inclined end portion (3) of the angled abutment (100) into the threaded blind hole (33) in order to fasten the assembly component (60) to the angled abutment (100) so that, by inserting the tip of the screwing-in tool into the screwing-in seat (63) of the shank-shaped body (61 ), it is possible to screw the angled abutment (100) directly to a dental implant (M) outside the mouth of a patient following the insertion by screwing of the first end portion (2) of the angled abutment (100) into the threaded blind axial hole (B) present in the dental implant (M) at a respective proximal end (MP) thereof, and then to subsequently be able to implant the dental implant (M) in the patient’s mouth.5) The assembly kit (20) as claimed in claim 4, wherein the transversal hole (66), present in the shank-shaped body (61 ) of the assembly component (60), comprises an annular narrowing (660) destined to form a stop abutment for a head of the threaded blocking element (68) when the threaded blocking element (68) is inserted through the transversal hole (66) and screwed into the threaded blind hole(100).6) The assembly kit (20) as claimed in any one of claims 4 and 5, wherein the shank-shaped body (61 ) of the assembly component (60) comprises notches or marks (67) which are positioned on the body of the shank-shaped body (61 ) in such a way as to indicate the position assumed by the transversal hole (66), and thus to indicate the position of the cap (31 ) of threfore of the second inclined end portion (3) of the angled abutment (100), when the assembly component (60) is coupled and fixed to the angled abutment (100).7) A method for realising a dental system (D) for supporting and anchoring a fixed dental prosthesis, comprising: using an angled abutment (100) as claimed in any one of claims from 1 to 3; using an assembly kit (20) as claimed in any one of claims from 4 to 6; using a dental implant (M) having a threaded body and comprising a cavity (E) at a respective proximal end (MP) thereof and a threaded blind axial hole (B) communicating with the cavity (E); using a support and anchoring element (A) comprising a coupling seat (40) located at a respective head (41 ) and an axial through-hole (45); wherein the method comprises carrying out following steps: coupling the angled abutment (100) to the assembly component (60) by insertion of the cap (31 ), present in the second inclined end portion (3) of the angled abutment (100), internally of the housing (65), present in the second inclined end (64) of the shank-shaped body (61 ) of the assembly component (60), until the annular abutment wall (32) of the second inclined end portion (3) goes into abutment against the second inclined end (64); fastening the angled abutment (100) to the assembly component (60) by insertingthe threaded blocking element (68) through the transversal hole (66) present in the shank-shaped body (61 ) of the assembly component (60) and the screwing of the threaded blocking element (68) into the threaded blind hole (33) of the cap (31 ) until the head of the threaded blocking element (68) goes into abutment against the annular narrowing (660) present in the transversal hole (66); inserting the threaded first end portion (2) of the angled abutment (100) internally of the threaded blind axial hole (B) of the dental implant (M); screwing the threaded first end portion (2) of the angled abutment (100) into the threaded blind axial hole (B) of the dental implant (M) by rotating the assembly component (60) by rotation of a tip of a screwing-in tool inserted in the screwing-in seat (63) present in the first planar end (62) of the shank-shaped body (61 ) of the assembly component (60) until the part of the body (15) of the central body (10) of the angled abutment (100) goes into abutment against an annular portion (E1 ) of the bottom of the cavity (E) made in the proximal end (MP) of the dental implant (M), inserting the dental implant (M) in a hole (BW) realised in an implant site (SW) in the maxilla or mandible (MA) of a patient and screwing the dental implant (M) into the hole (BW) by rotating the assembly component (60) by rotation of a tip of a screwing-in tool inserted in the screwing-in seat (63) present in the first planar end (62) of the shank-shaped body (61 ) of the assembly component (60) until the dental implant (M) is implanted to the desired depth and with the second inclined end portion (3) of the angled abutment (100) remaining projecting and orientated in a desired angular position; removing the threaded blocking element (68) and decoupling the assembly component (60) from the angled abutment (100), leaving the second inclined endportion (3) of the angled abutment (100) accessible; coupling the support and anchoring element (A) to the angled abutment (100) by insertion of the cap (31 ), present in the second inclined end portion (3) of the angled abutment (100), in the coupling seat (40) present in the head (41 ) of the support and anchoring element (A) until a terminal wall (42) of the head (41 ) of the support and anchoring element (A) goes into abutment against the annular abutment wall (32) of the second inclined end portion (3), fastening the support and anchoring element (A) to the angled abutment (100) by inserting the threaded fastening element (50) through the axial through-hole (45) present in the support and anchoring element (A) and by screwing the threaded fastening element (50) into the threaded blind hole (33) present in the cap (31 ), so as to obtain a dental system (D) implanted into the maxilla or mandible (MA) of a patient suitable for supporting and anchoring a dental prosthesis.8) The method as claimed in claim 7, wherein the desired angular position of the second inclined end portion (3) of the angled abutment (100) is determined and identified by means of the position of notches or marks (67) present in the shankshaped body (61 ) of the assembly component (60), indicative of the position of the cap (31 ) present in the second inclined end portion (3) of the angled abutment (100).

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