Osteotome set for dental implant socket formation with alternating base and crestal work areas

Abstract

A number of osteotomes, n, form a set of osteotomes, for use during a ridge expansion osteotomy to reduce alveolar stress and to reduce likelihood of a fracture, with each osteotome of the set having a conical working tip with a free end having a diameter .sub.An, and a working base .sub.Bn; a first osteotome, n=1, of the set has the working tip formed with a first diameter, .sub.A1=Y, at the free end, and with a second diameter, .sub.B1X, at the working base, the second diameter being larger than the first diameter, X>Y; and wherein for successive osteotomes of the set, the diameter at the free end increases as an alternate step and regressive step sequence, and the diameter at the working base alternately increases by a constant increment c, as a step function.

Claims

1. A number of osteotomes, n, forming a set of osteotomes, for use during a ridge expansion osteotomy to reduce alveolar stress and to reduce likelihood of a fracture, each said osteotome of said set comprising a conical working tip with a free end having a diameter .sub.An, and a working base .sub.Bn; a first osteotome, n=1, of said set comprising said working tip formed with a first diameter, .sub.A1=Y, at said free end, and with a second diameter, .sub.B1=X, at said working base, said second diameter being larger than said first diameter, X>Y; and wherein for successive osteotomes of said set, said diameter at said free end increases as an alternate step and regressive step sequence, and said diameter at said working base alternately increases by a constant increment, c, as a step function.

2. The set of osteotomes according to claim i, wherein when n=4 osteotomes in said set, said diameter, .sub.An, at said free end of each said osteotome in said set is as follows:
.sub.A1=Y
.sub.A2Y+k
.sub.A3=Y+kr
.sub.A4=Y+2k, and said diameter, .sub.Bn, at said base of each of said osteotome in said set is as follows: ti .sub.B1=X
.sub.B2=X
.sub.B3=X+c
.sub.B4=X+c.

3. The set of osteotomes according to claim 2, wherein r is in the range of 0.25 mm to 0.5 mm.

4. The set of osteotomes according to claim 2, wherein r is in the range of 0.1 mm to 0.2 mm.

5. The.set of osteotomes according to claim 2, wherein r is in the range of 0.0 mm to 0.1 mm.

6. The set of osteotomes according to claim 2, wherein kC.

7. The set of osteotomes according to claim 1, wherein when n=5 osteotomes in said set, said diameter, .sub.An, at said free end of each said osteotome in said set is as follows:
.sub.A1=Y
.sub.A2Y+k
.sub.A3=Y+kr
.sub.A4=Y+2k
.sub.A5=Y+2kr, and said diameter, .sub.Bn, at said base of each of said osteotome in said set is as follows: ti .sub.B1=X
.sub.B2=X
.sub.B3=X+c
.sub.B4=X+c
.sub.B5=X+2c.

8. The set of osteotomes according to claim 7, wherein r is in the range of 0.25 mm to 0.5 mm.

9. The set of osteotomes according to claim 7, wherein r is in the range of 0.1 mm to 0.2 mm.

10. The set of osteotomes according, to claim 7, wherein r is in the range of 0.0 mm to 0.1 mm.

11. The set of osteotomes according to claim 7, wherein kC, and r<k.

12. The set of osteotomes according to claim 1, wherein when n=6 osteotomes in said set, said diameter, .sub.Bn, at said base of each said osteotome in said set is as follows:
.sub.A1=Y
.sub.A2Y+k
.sub.A3=Y+kr
.sub.A4=Y+2k
.sub.A5=Y+2kr
.sub.A6=Y+3k, and said diameter, .sub.Bn, at said base of each of said osteotome in said set is as follows: ti .sub.B1=X
.sub.B2=X
.sub.B3=X+c
.sub.B4=X+c
.sub.B5=X+2c
.sub.B6=X+2c.

13. The set of osteotomes according to claim 12, wherein r is in the range of 0.25 mm to 0.5 mm.

14. The set of osteotomes according to claim 12, wherein r is in the range of 0.1 mm to 0.2 mm.

15. The set of osteotomes according to claim 12, wherein r is in the range of 0.0 mm to 0.1 mm.

16. The set of osteotomes according to claim 12, wherein kC, and r<k.

17. An osteotome comprising a conical tip, said conical tip comprising a first cross-cut formed substantially parallel to an axial direction of said tip, and extending from a distal end of said tip to terminate proximate to a full working depth of said tip; a first through-hole centered upon said termination of said first cross-cut, being oriented parallel to said first cross-cut and perpendicular to the axial direction of said tip; a second cross-cut formed substantially parallel to the axial direction of said tip, and being clocked, with respect to the axial direction, to be 90 degrees away from said first cross-cut, a second through-hole centered upon said termination of said second cross-cut, being oriented parallel to said second cross-cut and perpendicular to the axial direction of said tip; said first and second cross-cuts configured to result in four prongs at said distal end of said tip; said first through-hole and said second through hole comprising a diameter being larger than a width of said cross-cuts to permit flexure of said four prongs.

18. The osteotome according to claim 17, wherein each of said first cross cut and said second cross-cut terminate beyond a.full working depth of said tip.

19. A combination osteotome and impact cap, said osteotome comprising a shaft configured to terminate at a first end thereof in a first conical working tip, and said shaft configured to terminate at a second end thereof in a second conical working tip, each of said first conical working tip and said second conical working tip comprising an annular ring; and said impact cap comprising a socket configured to receive a portion of said first conical tip or said second conical tip therein, and means for engaging said annular ring for transmitting force thereto and for preventing contact between said tip end and said impact cap.

20. The combination osteotome and an impact cap according to claim 19, further comprising one or more through holes into a base of said socket, for transmitting steam during sterilization of said impact cap.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The description of the various example embodiments is explained in conjunction with appended drawings, in which:

(2) FIG. 1 illustrates an osteotome;

(3) FIG. 1A illustrates an enlarged detail view of the end of the osteotome of FIG. 1.

(4) FIG. 2 illustrates a side view of the end of an osteotome in accordance with a first embodiment of the present invention;

(5) FIG. 2A is an end view of the tip of the osteotome embodiment shown in FIG. 2;

(6) FIG. 3 illustrates a side view of the end of an osteotome in accordance with a second embodiment of the present invention;

(7) FIG. 3A is an end view of the tip of the osteotome embodiment shown in FIG. 3;

(8) FIG. 3B is a section view taken at the base of the tip of the osteotome shown in FIG. 3;

(9) FIG. 4 illustrates a set of osteotomes with flexible tips constructed in accordance with FIGS. 2 and 3, and with the osteotome set exhibiting a nominal Summers' diameter escalation;

(10) FIG. 4A illustrates a set of osteotomes with flexible tips constructed in accordance with an alternate embodiment, where each of the tips are configured to flex beyond its maximum working depth.

(11) FIG. 5 illustrates a first double-ended osteotome of a set of double-ended osteotomes;

(12) FIG. 6 illustrates a second double-ended osteotome of a set of double-ended osteotomes;

(13) FIG. 7 illustrates a third double-ended osteotome of a set of double-ended osteotomes;

(14) FIG. 8 illustrates a side view of a first embodiment of an impact cap usable with the double-ended osteotomes of FIGS. 5-7.

(15) FIG. 9 shows a cut-away view of the impact cap of FIG. 8, positioned upon one end of the double-ended osteotomes of FIG. 7.

(16) FIG. 10 illustrates a mallet being used to strike the impact cap positioned upon the double-ended osteotome, as shown in FIG. 9.

(17) FIG. 11A illustrates a second embodiment of an impact cap, prior to being positioned upon one end of the double-ended osteotome of FIG. 7.

(18) FIG. 11B illustrates the impact cap of FIG. 11A, after being positioned upon the end of the double-ended osteotome.

(19) FIG. 12A illustrates a third embodiment of an impact cap, prior to being positioned upon one end of a double-ended osteotome of FIG. 7.

(20) FIG. 12B illustrates the impact cap of FIG. 12A, after being positioned upon the end of the double-ended osteotome.

(21) FIG. 13A illustrates a fourth embodiment of an impact cap, prior to being positioned upon one end of a double-ended osteotome of FIG. 7.

(22) FIG. 13B illustrates the impact cap of FIG. 13A, after being positioned upon the end of the double-ended osteotome.

(23) FIG. 14 illustrates a first osteotome tip having a second osteotome tip overlaid thereon, and having a 1 mm diameter escalation at the distal end of the tip, and an unchanged 3 nun base diameter.

(24) FIG. 15 illustrates a third osteotome tip overlaid upon the second osteotome tip of FIG. 14, having a 1 mm diameter escalation at the base of the tip, with an unchanged distal 2 mm (apical) diameter.

(25) FIG. 16 illustrates insertion of the third osteotome tip of FIG. 15 into an implant socket previously worked by the second osteotome tip shown in FIG. 15.

(26) FIG. 17 illustrates a third osteotome tip in accordance with the present invention overlaid upon the second osteotome tip of FIG. 14, having a one millimeter base diameter escalation, with a corresponding regressive 1.5 mm diameter size at the distal end.

(27) FIG. 18 illustrates a set of osteotomes that utilize a tip escalation scheme of the present invention, which creates alternating base to crest work (compression) areas in the dental implant socket during formation, with a stepped diameter escalation at the base of the tip, and an alternating step/regressive step escalation scheme at the free end.

DETAILED DESCRIPTION OF THE INVENTION

(28) As used throughout this specification, the word may is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words include, including and includes mean including but not limited to.

(29) The phrases at least one, one or more, and and/or are open-ended expressions that are both conjunctive and disjunctive in operation. For example, each of the expressions at least one of A, B and C, one or more of A, B, and C, and A, B, and/or C mean all of the following possible combinations: A alone; or B alone; or C alone; or A and B together; or A and C together; or B and C together; or A, B and C together.

(30) Also, all references (e.g., patents, published patent applications, and non-patent literature) that are cited within this document are incorporated herein in their entirety by reference.

(31) Furthermore, the described features, advantages, and characteristics of any particular embodiment disclosed herein, may be combined in any suitable manner with any of the other embodiments disclosed herein.

(32) FIG. 1 shows a prior art osteotome 99 that has traditionally been used for providing expansion and compaction of bone surrounding an implant pilot hole formed in an alveolar ridge during a sinus lift procedure. FIG. 1A shows and enlarged detail view of the tip of the osteotome of FIG. 1.

(33) An osteotome 100 configuration in accordance with an embodiment of the present invention is shown in FIGS. 2-2A. As seen in the side view of FIG. 2, the tip of the osteotome 100 may be formed with a cross-cut, which may be formed to be substantially parallel to the axial direction of the tip, so that it permits a degree of inward flexing of the resulting two tip portions 100A/100B. In another embodiment, at least two pairs of cross-cuts may be used, as seen in the end view of FIG. 3B, to form the resultant tip portions 102A, 102B, 102C, and 102D. The exterior surface of each of the tip portions 102A, 102B, 102C, and 102B may still be conical, and any desired diameter escalation scheme may be used for the diameter at the free end, and the diameter at the base of the tip 102. Merely to be exemplary, FIG. 4 illustrates a set of osteotomes formed with the above-described cross-cut for each of the tips, and which utilizes a prior art Summers' diameter escalation scheme. As seen in FIG. 3 and thesection view of FIG. 3B, the end of the cross-cuts may terminate proximate to the base of the tip at an orifice, which may be a through-hole. The through-hole may have a radius being substantially larger than the opening formed by the cross-cut, being between 25% and 100% larger than the width shown for the cross-cut opening, in one embodiment, and being between 100% and 200% larger than the width in another embodiment. The through-hole may also be sized to locally reduce the cross-sectional area of the tip by between 50% and 85%. An elliptically-shaped or other shaped orifice may alternatively be used. An enlarged orifice may be formed, for each of the cross-cuts (i.e., where a pair of cross-cuts are used, a first orifice 102Pi and a second orifice 102 Pii may correspondingly be usedsee FIG. 3A). The enlarged orifices may be formed proximate to the full working depth of the tip, as shown for the osteotome set in FIG. 4.

(34) To enable greater flexure at the base of the tip, the cross-cuts may extend to orifices that may be formed at a substantial distance beyond the full desired working depth of the tip (see FIG. 4A), and a spacer may be used to limit the extent to which the tip may be inserted into the alveolar socket, to be limited to that intended working depth.

(35) The flexure provide by the cross-cuts in the tips of these osteotome embodiments serves to reduce stress on alveolar ridge during socket formation. In one embodiment, as shown in FIG. 4A, the first osteotome in the set may be formed without the cross-cut, and all the rest of the osteotomes in the set may be formed with the cross-cuts.

(36) Note that use of the cross-cuts on the osteotomes in the set may, for some patient's, tend to require the use of an additional number of osteotomes in the set to produce the final properly sized implant socket.

(37) In an alternate embodiment, every other osteotome in the set of osteotomes may be formed with the cross-cuts. In one embodiment, the diameter escalation scheme utilized may progress (i.e., may only increase) for alternate osteotomes in the set, such that any diametrical increase may occur on an osteotome with the cross-cuts, and the successive osteotome in the set, being without the cross-cuts, may be formed with the same diameter (i.e., no escalation), and may serve to further develop the socket opening that may have only been partially compressed/formed by the previous (cross-cut) osteotome.

(38) FIGS. 5-7 illustrate a set of osteotomes formed in accordance with another embodiment of the present invention. Each of the three osteotomes 201/202/203 shown in FIG. 5, FIG. 6. and FIG. 7 may be formed to be double ended, thus reducing by half the number of separate osteotome tools that may be required for the set. In order to be able to use a mallet on the exposed end of the double-ended osteotome, an impact cap 215, such as the one shown in FIG. 8, may be placed thereon, as seen in FIG. 9 and FIG. 10. The impact cap 215 may be formed with an internal opening large enough so that it may be properly seated upon any one of the ends of the double-ended osteotomes in the set, to contact and transmit force to the annular ring thereat (e.g., 203R), without any contact with the distal end of the tip that is to be used for socket formation. Also, the impact cap 215 may be formed with one or more holes 215H (see FIG. 9) to better accommodate thorough steam sterilization of the cap.

(39) An alternate impact cap 225 is shown in FIGS. 11A-11B. Each of caps 215 and 225 may be formed of any suitable material, including, but not limited to, Teflon, and may be configured to freely slide onto and off of any of the ends of the double-ended osteotomes 201/202/203. The impact cap 235 shown in FIG. 12A is formed with an annular protrusion 235P that is configured to be received within an annular recess in the annular ring 203R of the osteotome 203, as seen in FIG. 12B. Instead of the annular protrusion, external threading may be formed on the cap to threadably engage with corresponding internal threading that may be formed on the osteotome. The impact cap 245 shown in FIG. 13A is formed with an annular protrusion 245P that is canted with respect to the axis of the cap, and is configured to be received within an correspondingly shaped/oriented annular recess in the dome-shaped ring 203D of the osteotome 203, as seen in FIG. 13B. The angled protrusion may be formed to be flexible, and may automatically deflect while being advanced along the dome shape until reaching the recess, without requiring use of a special tool, and may similarly be removed therefrom simply by applying an axial force in the opposite direction.

(40) FIG. 18 illustrates a set that includes a number, n, of osteotomes that are formed with tips that do not follow any of the prior art escalation schemes, and are particularly configured to further reduce stress during implant socket formation, and reduce the overall likelihood of a fracture. Each of the osteotomes of the set have a conical working tip with a free end having a diameter .sub.An, and a working base having a diameter .sub.Bn. The first osteotome of the set (n=1) has a working tip formed with a first diameter, .sub.A1=Y. at the free end, and a second diameter, .sub.B1=X, at the base (i.e., at the full working depth), with the second diameter being larger than the first diameter, i.e., X>Y. The successive osteotomes of the set have a unique diameter escalation scheme.

(41) The diameter at the free end of the tip alternately increases (i.e., the diameter increases by a constant increment k every other osteotomethat is for each even numbered osteotome2, 4, 6, etc.), but the diameter at the free end may also regress (i.e., it decreases) between each such alternate diametrical increase (i.e., the diameter may decrease an amount r for each of the odd numbered osteotomes3, 5, 7, etc.).

(42) The diameter at the base of the tip (i.e., at its full working depth) alternately may increase by a constant increment, c, i.e., it increases as a step function, with the diameter at the base of the tip increasing by an amount c for each of the odd numbered osteotomes3, 5, 7, etc. These increases are illustrated within FIG. 18.

(43) In one embodiment, the amount, r, that the diameter at the free end may regress may be in the range of 0.25 mm to 0.5 mm. In another embodiment, the amount, r, that the diameter at the free end may regress may be in the range of 0.1 mm to 0.2 mm. In yet another embodiment, the amount, r, that the diameter at the free end may regress may be in the range of 0.0 mm to 0.1 mm.

(44) The advantageous nature of this escalation scheme may be understood from FIGS. 14-17. FIG. 14 shows two osteotome tips overlaid, with the diameter at the base being the same, and with the diameter at the free end of the tip being escalated from 1 millimeter to 2 millimeters, in going from the first osteotome tip to the second osteotome tip. Use of these two tips for the first two osteotomes during implant socket formation provides for greater compression at the base of the alveolar ridge, and relatively insubstantial compression moving towards the crest of the ridge, which is illustrated graphically in FIG. 14 by the changing length of the arrows shown therein.

(45) A third osteotome tip is overlaid on the second osteotome tip in FIG. 15, in which the diameter at the base of the third osteotome tip has been escalated from 3 millimeters to 4 millimeters. Use of these two tips for the second and third osteotomes during implant socket formation provides for a substantial amount of compression at the crest of the alveolar ridge, which does not diminish appreciably in moving towards the bottom of the ridge (i.e., at the free end of the tip), which is illustrated graphically in FIG. 15 by the arrows shown therein. This means that as the third osteotome is initially inserted into the socket, as shown in FIG. 16, the crest will first be contacted, and have pressure applied thereto, which pressure will constantly increase as the osteotome is inserted further, and such pressure will by successively applied to increasingly deeper portions of the ridge.

(46) A more gradual escalation scheme is illustrated in FIG. 17, in which a third osteotome tip is overlaid over the second osteotome, where the diameter at the base of the third osteotome tip has been escalated from 3 millimeters to 4 millimeters, but the diameter at the free end of the tip has regressed from 2 millimeters to 1.5 millimeters. Use of these two tips for the second and third osteotomes during implant socket formation provides for zero compression at roughly the deepest half of the implant socket in the alveolar ridge, with an increasing amount of compression in moving from the middle of the socket towards the crest of the ridge (i.e., towards the base of the tip), which is illustrated graphically in FIG. 17 by the arrows shown therein. Therefore, only the shallowest half of the implant socket (that being closest to the crestal portion) is worked with the third osteotome, and only after the second osteotome had already been used to work the lower half of the implant socket to compress and thin the deep bone, to make it more flexible before using the third osteotome.

(47) It should be noted that the osteotome tips disclosed herein may be used with motor driven devices, and as such, the tips may also have threads formed thereon.

(48) While illustrative implementations of one or more embodiments of the present invention are provided hereinabove, those skilled in the art and having the benefit of the present disclosure will appreciate that further embodiments may be implemented with various changes within the scope of the present invention. Other modifications, substitutions, omissions and changes may be made in the design, size, materials used or proportions, operating conditions, assembly sequence, or arrangement or positioning of elements and members of the exemplary embodiments without departing from the spirit of this invention.

(49) Accordingly, the breadth and scope of the present disclosure should not be limited by any of the above-described example embodiments, but should be defined only in accordance with the following claims and their equivalents.