TWO-STAGE PRECISION GUIDE AND METHOD FOR FIXING TO A LOW-HEIGHT MAXILLARY BONE TRIPOD WITH SHORT DENTAL IMPLANT FUNCTION

Abstract

A two-stage precision guide and a method for fixing to a tripod with short dental implant function. The two-stage precision guide includes a fixation guide and a drilling guide. In a first stage of use, the fixation guide is adhered to the tripod allowing the body of the tripod, containing five perforations and having three identical feet, to be positioned on the bone. In the second stage of use, once the body has been fixed to the bone, the two-stage guide allows the bone to be worked on using the drilling guide. Once the holes have been made, the two parts of the two-stage guide are removed to be subsequently fixed to the bone by the body. With the feet being placed in the bone, a dental prosthesis can be situated on the tripod thereby allowing the tripod to act as a short dental implant.

Claims

1. A two-stage precision guide for fixing a tripod with a short dental implant function in a low-lying maxillary bone, the two-stage precision guide comprising: a fixation guide and a drill guide, wherein the fixation guide is a solid cup-shaped block extending along a central axis without a shaft and including a polyhedral foot having a cylindrical chalice, located above and extending about an outer surface of the polyhedral foot, and the polyhedral foot defining a polyhedral cavity opening upwards, the polyhedral foot of the fixation guide defining five holes whereby these three of the five holes, spaced from one another and extending through said polyhedral foot, being inclined and having a cylindrical shape, identical to one another, central axes of the three of the five holes cross with the central axis of the fixation guide at a same point located above the fixation guide; each of the three of the five holes having an inlet including an inlet center located at an upper base of the polyhedral foot of the fixation guide whereby the inlet centers, connected to one another, forms an equilateral triangle; each of the three of the five holes having an outlet including an outlet center located at a bottom base of the polyhedral foot of the fixation guide whereby the outlet centers, connected to one another, forms a larger sized equilateral triangle, the polyhedral foot of the fixation guide defining a fourth hole, having a cylindrical shape, located between two of the three holes, spaced from the two of the three holes extending parallel to the central axis, wherein the fourth hole tapers inside by an annular edge perpendicular to the central axis, the fourth hole having an entrance and an exit with the entrance located in the upper base of the polyhedral foot and the exit located at the bottom base of the polyhedral foot whereby the entrance is wider than the exit, the polyhedral foot further defining a fifth hole, having a polyhedral shape, extending along the central axis, surrounded by and spaced from the three holes and the fourth hole, wherein the polyhedral cavity is delimited from below by the upper base of the polyhedral foot, a plurality of three rails, each located in one of three sagittal planes of the three of the holes, and adhered to an outside wall of the chalice extending parallel to the central axis, wherein the drill guide is a polyhedral slab having an exact same polyhedral shape as the polyhedral cavity of the fixation guide for placement in the polyhedral cavity; the drill guide having an upper base and a bottom base with the bottom base including a polyhedral pivot projecting downwardly from a center of the bottom base whereby the polyhedral pivot has a shape that corresponds to the fifth hole of the fixing guide; a handle, having a polymorphous shape and located at a corner of the upper base, protruding outwardly from the upper base; the drill guide defining three holes, spaced from one another and being inclined, with each of the holes having a cylindrical shape and identical to one another, extending through the drill guide wherein central axes of each of the inclined holes intersect with a central axis of the drill guide at a same point located above the drill guide, each of the three holes of the drill guide having an inlet including an inlet center located in the upper base of the drill guide whereby the inlet centers, connected to one another, forms an equilateral triangles, each of the three holes of the drill guide having outlet including an outlet center located located in the lower base of the drill guide whereby the outlet centers, connected to one another, forms a larger sized equilateral triangle, wherein the three holes of the drill guide have a width that is less than the width of the three of the five holes of the fixation guide and the outlets of the three holes of the drill guide are in connection with the inlets of the three of the fixation guide; the drill guide defining a fourth hole, located between two of the three holes of the drill guide and having cylindrical shape, extending parallel to the central axis of the drill guide wherein the fourth hole of the drill guide tapers inside by an annular edge perpendicular to the central axis thereby reducing diameter of the fourth hole from an entrance of the fourth hole located on the upper base to an exit of the fourth hole located on the bottom base; wherein a width of the outlet of the fourth hole of the drill guide is the same as a width of the entrance of the fourth hole of the fixation guide.

2. The two-stage precision guide according to claim 1, wherein the tripod comprises a central cylindrical body, having a shape of a wide-floor glass; the central cylindrical body defining a polyhedral cavity opening upwards and surrounded by a cylindrical wall, having a smooth outer surface, the central cylindrical body including a floor having a rough surface and an external helical threads; the floor of the central cylindrical body defining a plurality of five perforations located at the floor of the polyhedral cavity and extending from an upper base of the floor with three of the five perforations, being inclined and spaced from one another, each having a cylindrical shape, identical to one another, wherein central axes of the perforations intersect with a central axis of the central cylindrical body at a same point located above the central cylindrical body; each of the three of the five perforations having an entry center, located at a bottom of the polyhedral cavity whereby the entry centers, connected to one another, forms an equilateral triangle; each of the three of the five perforation having an outlet center located on the sides or at a lower base of the floor, whereby the outlet centers, connected to one another, forms a larger sized equilateral triangle, each of the three of the five perforations being composed of two cylindrical spaces including an upper space and a lower space with the upper space being separated from the lower space by an annular edge, located perpendicular to a central axis of the perforation; wherein the upper space is wider than the lower space and the lower space includes propeller threads located in the lower space; the floor defining a fourth perforation, having a cylindrical shape, located between two of the three perforations of the cylindrical body and spaced from the two of the three perforations, extending parallel to the central axis of the central cylindrical body which does not pass through the floor; the fourth perforation of the central cylindrical body being enclosed by a wall containing internal helical threads; the floor defining a fifth perforation, having a cylindrical shape, located at a center of the floor, surround by and spaced from the three perforations and the fourth perforation, wherein the fifth perforation does not extend through the floor and that the fifth perforation being surrounded by a wall including internal helix threads.

3. The two-stage precision guide according to claim 1, wherein the tripod comprises a central cylindrical body having a shape of a wide-floor glass; the central cylindrical body containing a polyhedral cavity, opening upwards, and surrounded by a cylindrical wall, having a smooth outer surface, the central cylindrical body including a floor having a rough surface and an external helical thread; the floor of the central cylindrical body defining a plurality of five perforations located in the polyhedral cavity and extending from an upper base of the floor of the central cylindrical body with three of the five perforations, being inclined and spaced from one another, each having a cylindrical shape, identical to one another, wherein central axes of the perforations intersect with a central axis of the central cylindrical body at a same point located above the central cylindrical body; each of the three of the five perforations having an entry center located at a bottom of the polyhedral cavity of the central cylindrical body whereby the entry centers, connected to one another, forms an equilateral triangle; each of the three of the five perforations having an outlet center, located on the sides or at an lower base of the floor of the central cylindrical body whereby the outlet centers, connected to one another, forms a larger sized equilateral; each of the three of the five perforations being composed of a single cylindrical space with smooth walls containing ditches that start from entrances of the cylindrical space, spaced from one another parallel to central axes of each of the five perforations wherein the ditches do not entirely cover the perforations.

4. A method of using the two-stage guide (45) as described in claim 2, the method includes the following steps: joining the fixation guide and the central cylindrical body of the tripod with the polyhedral foot of the fixation guide being rested in the polyhedral cavity of the central cylindrical body and the chalice resting on a top surface of the central cylindrical body of the tripod; fixing the fixation guide to the central cylindrical body of the tripod by inserting a screw into the fourth hole of the fixation guide and the fourth perforation of the central cylindrical body of the tripod wherein the screw has a head portion and a stem portion with the head portion defining a polyhedral cavity and the stem portion, being narrower than the head portion, including external helical threads; introducing the central cylindrical body of the tripod the bone and positioning the central cylindrical body by arranging the three rails in the chalice of the fixation guide; removing the screw; fixing the drill guide, the fixation guide, and the central cylindrical body of the tripod by inserting a screw into the fourth hole of the drill guide, the fourth hole of the fixation guide, and the fourth perforation of the central cylindrical body of the tripod wherein the screw has a long and stepped head defining a polyhedral cavity disposed therein and a cylindrical narrower stem with external propeller threads; perforating the bone through the three holes of the drill guide; removing the long and stepped head of the screw; removing the two-stage guide; introducing three legs of the tripod wherein each of the three legs has a cylindrical head defining a polyhedral cavity located at a center of the cylindrical head and cylindrical stem with the cylindrical stem being narrower than the cylindrical head.

5. A method of using the two-stage guide (45) as described in claim 3, the method includes the following steps: joining the fixation guide and the central cylindrical body of the with the polyhedral foot of the fixation guide being rested in the polyhedral cavity of the central cylindrical body and the chalice resting on a top surface of the central cylindrical body of the tripod; fixing the fixation guide to the central cylindrical body of the tripod by inserting a screw into the fourth hole of the fixation guide and the fourth perforation of the central cylindrical body of the tripod wherein the screw has a head portion and a stem portion with the head portion defining a polyhedral cavity and the stem portion, being narrower than the head portion, including external helical threads; introducing the central cylindrical body of the tripod into the bone and position the central cylindrical body by arranging the three rails in the chalice of the fixation guide; removing the screw; fixing the drill guide, the fixation guide, and the central cylindrical body of the tripod by inserting a screw into the fourth hole of the drill guide, the fourth hole of the fixation guide, and the fourth perforation of the central cylindrical body of the tripod wherein the screw has a long and stepped head defining polyhedral cavity disposed therein and a cylindrical narrower stem with external propeller threads; perforating the bone through the three holes of the drill guide; removing the long and stepped head of the screw; removing the two-stages guide; introducing three legs of the tripod wherein each of the three legs includes a head and a trunk with the head having a same width as the trunks and the head contains rails parallel to a central axis of the legs and defining at least one polymorphous perforations perpendicular to the central axis of the legs and in communication with a polyhedral perforation.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The description is supplemented, for an easy understanding of this description, with a set of drawings in which, with an illustrative and non-limiting character, the elements of the invention used during the fixing phase of the tripod body are represented as follows:

[0030] FIG. 1 represents a perspective side view of the two separate elements necessary for the use of the invention in its first phase of use. Here we see above the fixing guide (1) and below the tripod's body (2A) in its first variant. Above the guide (1) we see the screw (3) with simple cylindrical head (4) and stem (5) with external screw threads. This arrangement allows us to see the chalice (6) of the fixation guide (1) with its three guide rails (7A, 7B and 7C) and the polyhedral cavity (8) of the fixation guide (1). Below we see the cylindrical wall (9A) and the cylindrical floor (10A) of the tripod's body (2A). We also see the polyhedral foot (11) of the fixation guide (1) and the polyhedral cavity (12A) of the tripod's body (2A).

[0031] FIG. 2 represents a side view of a sagittal cut in perspective of the two separate elements necessary for the use of the invention in its first phase. Here we see above the fixing guide (1) and below the tripod's body (2A) in the first of its two variants. Above the fixing guide (1) we see the screw (3) with a simple cylindrical head (4) and stem (5) with external screw threads. This arrangement allows us to see, the calyx (6) of the fixation guide (1), a sagittal section of the orientation rail (7A), the orientation rail (7B) and the polyhedral cavity (8) of the fixation guide (1). Below we see the cylindrical wall (9A) and the floor (10A) of the tripod's body (2A) in one of its variants. We also see the polyhedral foot (11) of the fixation guide (1) and the polyhedral cavity (12A) of the tripod's body (2A) in one of its variants. Here we can see more detailed four holes of the fixing guide (1): a hole inclined (13A) in sagittal section, the entrance of another inclined hole (13B), its fourth hole (14) with its annular edge (15) and its fifth polyhedral hole (16). We also see the polyhedral cavity (17) of the screw (3). We also see four perforations of the tripod's body (2A) in one of its variants: an inclined perforation (18AA) represented with a wide upper part (19A) and a narrow lower part (19B) with propelled threads both separated by an annular edge (20); the entrance of another inclined perforation (18BA), its fourth perforation (21A) with propeller threads and its fifth perforation (22A) with propeller threads.

[0032] FIG. 3 represents a side view of a sagittal cut in perspective of the second variant of the tripod's body or alternative body (2B), represented with an inclined perforation (18AB) of a single space (23) with a trench (24) on the wall. We also see the polyhedral cavity (12B), the cylindrical wall (9B) and the floor (10B) of the alternative body (2B) of the tripod. We also see, his fourth perforation (21B) with propeller threads and his fifth perforation (22B) with propeller threads.

[0033] FIG. 4 represents a top view of the fixing guide (1) where we see the chalice (6) of the fixing guide (1) with its three guide rails (7A, 7B and 7C) and the polyhedral cavity (8) of the fixation guide (1). We see the entrances of the three inclined holes (13A, 13B and 13C) of the fixing guide (1), its fourth hole (14) with its annular edge (15) and its fifth polyhedral hole (16).

[0034] FIG. 5 represents a top view of the first variant of the body's tripod (2A), where we see its cylindrical wall (9A) and its polyhedral cavity (12A). We also see the entrances of the three inclined perforations (18AA, 18BA and 18CA) of the body (2A) of the tripod in one of its variants, its fourth perforation (21A) and its fifth perforation (22A) cylindrical.

[0035] FIG. 6 represents a perspective side view of the drill guide (25) where we can see, the handle (26) of this guide (25) and the four entrances of its four holes: the three entrances of its three inclined holes (27A, 27B and 27C) and the entrance of its fourth hole (28). We can also see the projecting polyhedral pivot (29) of the lower base of this drill guide (25).

[0036] FIG. 7 represents a top view of the drill guide (25) where we see its handle (26) and the four entrances of its four holes: the three entrances of its three inclined holes (27A, 27B and 27C) and the entrance of its fourth hole (28) with its annular edge (30).

[0037] FIG. 8 represents a perspective side view of the long and stepped head (32) screw (31) as well as its stem (33). We also see the polyhedral cavity (34) of the screw (31).

[0038] FIG. 9 represents a side view of a sagittal cut in perspective of the three separate elements necessary for the use of the invention in its second phase of use, the fixing guide (1), the first variant of the body (2A) of the tripod and the drill guide (25) together with the corresponding screw (31). Here we see above the drill guide (25) its handle (26), the inclined hole (27A), the entrance of the inclined hole (27B), its fourth hole (28) with its annular edge (30). We can also see the projecting polyhedral pivot (29) of the lower base of this drill guide (25). Above the drill guide (25) we see the long and stepped head (32) screw (31) with its polyhedral cavity (34) as well as its stem (33).

[0039] FIG. 10 shows a perspective side view of a possible leg (35) of the tripod here with a cylindrical head (36) having a polyhedral cavity (37) at its centre and a smooth or rough trunk (38). We see the coupling rails (39) of the head (36), here two, and also a polymorphous piercing (40) of the head (36).

[0040] FIG. 11 shows a side perspective view of another possible leg (41) of the tripod here with a cylindrical head (42) having a polyhedral cavity (43) at its centre and a narrower trunk (44) with external helical threads.

[0041] FIG. 12 shows the two stages precision guide (45) for fixing a tripod with short dental implant function with its two elements, the guide (1) for fixing the body (2A) of the tripod in one of its variants and the drill guide (25).

PREFERENTIAL REALIZATION OF THE INVENTION

[0042] As already indicated, and as can be seen in FIG. 1, in its first phase of use, the two stages precision guide (45) to fix a tripod with short dental implant function, in a low jaw bone, object of the invention, in its preferred embodiment, comprises above the fixing guide (1) and below the body (2A) of the tripod, in the first of its two variants, joined by the simple cylindrical head (4) screw (3) and its stem (5) with external screw threads. More detailed, we see the chalice (6) of the fixation guide (1) with its three guide rails (7A, 7B and 7C) and the polyhedral cavity (8) of the fixation guide (1). Below we see the cylindrical wall (9A) and the cylindrical floor (10A) of the tripod's body (2A) in one of its variants. We also see the polyhedral foot (11) of the fixation guide (1) and the polyhedral cavity (12A) of the tripod's body (2A) in the first of its variants. In FIG. 2 we see the same objects of FIG. 1 with a sagittal cut which allows to appreciate in more detail some holes of the fixation guide (1) and of the tripod's body (2A) in the first of its variants: an inclined hole (13A) of the fixation guide in sagittal section, the entrance of another inclined hole (13B), its fourth hole (14) with its annular edge (15) and its fifth polyhedral hole (16). We also see the polyhedral cavity (17) of the screw (3). We also see four perforations of the tripod's body (2A) in the first of its variants: an inclined perforation (18AA) represented with a wide upper part (19A) and a narrow lower part (19B) with helical threads separated by an annular edge (20); the entrance of another inclined hole (18BA), its fourth hole (21A) with propeller threads and its fifth hole (22A) with propeller threads. In FIG. 3 we see the second variant in a sagittal section of a tripod's body or alternative body (2B), with an inclined perforation of a single space (23) and a trench (24) in its wall. We also see the polyhedral cavity (12B), the cylindrical wall (9B) and the floor (10B) of the alternative tripod's body (2B). We also see, his fourth perforation (21B) with propeller threads and his fifth perforation (22B) with propeller threads. In FIG. 4 we see a top view of the fixation guide (1) that allows us to see the proportions of this guide as well as its calyx (6), its four orientation rails (7A, 7B and 7C), its polyhedral cavity (8), the entrances of its three inclined holes (13A, 13B and 13C), its fourth hole (14) with its annular edge (15) and its fifth polyhedral hole (16). In FIG. 5 we see a top view of the tripod's body (2A) in its first variant, which allows us to see the proportions of this as well as its cylindrical wall (9A), its polyhedral cavity (12A), the entrances of its three perforations inclined (18AA, 18BA and 18CA), its fourth perforation (21A) and its fifth perforation (22A). In FIG. 6 in its second phase of use, the precision two-stage guide (45) for fixing a tripod with short dental implant function, in a low-lying maxillary bone, object of the invention, in its preferred embodiment, comprises the drill guide (25) with its handle (26) and the four entrances of its four holes: the three entrances of its three inclined holes (27A, 27B and 27C) and the entrance of its fourth hole (28). It also shows the outgoing polyhedral pivot (29) of its lower base. In FIG. 7 we see a top view of the drill guide (25) where we see its handle (26) and the four entries of its four holes: the three entrances of its three inclined holes (27A, 27B and 27C) and the entrance of its fourth hole (28) with its annular edge (30). In FIG. 8 we see the long and stepped head (32) screw (31), its polyhedral cavity (34) and its stem (33). In FIG. 9 we see in more detail the three separate elements necessary for the second phase of use of the invention, the fixing guide (1), the tripod's body (2A) in its first variant, and the drill guide (25) together with the corresponding screw (31). Here we see above the drill guide (25) where we see its handle (26), the inclined hole (27A), the entrance of the inclined hole (27B), its fourth hole (28) with its annular edge (30). We can also see the projecting polyhedral pivot (29) of the lower base of this drill guide (25). Above the drill guide (25) we see the long and stepped head (32) screw (31) with its polyhedral cavity (34) as well as its stem (33). In FIG. 10 we see a possible leg (35) of the tripod here with a cylindrical head (36) having a polyhedral cavity (37) at its centre and a smooth or rough trunk (38). We see the coupling rails (39) of the head (36), here two, and also a polymorphous piercing (40) of the head (36). In FIG. 11 we see another possible leg (41) of the tripod here with a cylindrical head (42) that has a polyhedral perforation (43) at its centre and a trunk (44) with external screw threads. In FIG. 12 we see the two-stage precision guide (45) for fixing a tripod with dental and short implant function, with its two components the fixation guide (1) and the drill guide (25) fixed to the tripod's body (2A) in the first of its variants.