Dentistry – Apparatus – Tool bit
Patent
1995-08-31
1998-11-24
O'Connor, Cary E.
Dentistry
Apparatus
Tool bit
408144, A61C 302
Patent
active
058398970
DESCRIPTION:
BRIEF SUMMARY
A dental implant generally comprises a body impacted in the alveolar bone. For this impaction, it is necessary to carry out a drilling of the bone by means of a drill. The drills employed for this type of operation are made of metal, especially of stainless steel, and constitute monobloc assemblies.
The cost of these drills is high in view of the nature of the materials from which they are made and of the need for special machining in order to form the cutting edges. This cost is found to be an important factor, given that for each implant there is a specially-adapted instrumentation.
Furthermore, in order to reuse such tools, it is necessary to sterilize them in view of their application and thereby to avoid any risk of contamination. It is thus obligatory, upon each use, to carry out particularly meticulous cleaning and sterilization.
In addition, these repeated uses inevitably lead to wear of the tool and, consequently, to a decrease in effectiveness.
The invention is based on the object of remedying these drawbacks in a straightforward, reliable, effective and rational manner.
The problem which the invention proposes to solve is that of proposing a drill of reduced cost which can be disposed of after each use, thereby obviating the cleaning and sterilization operations, and consequently ensuring its sterile nature upon each use.
In order to solve such a problem, and in a first embodiment, a drill has been designed and developed which comprises a portion, in the form of a rod, for connection to an apparatus of the drilling machine type, and an active cutting portion, said portions constituting a monobloc disposable plastic assembly.
In another embodiment, the drill comprises a portion, in the form of a rod, for connection to an apparatus of the drilling machine type, and an active cutting portion, said portions being independent, the rod being made of stainless steel, and the active portion being made of plastic, and they have complementary arrangements so that they can be assembled by overmolding with a view to forming a disposable assembly.
In order to solve the given problem of increasing the cutting efficiency and the hardness of the active portion, the latter has a metal insert serving as a sharp edge.
It is also proposed that the end of the active portion has a metal cutting tip attached to and embedded in the plastic.
In order to solve the given problem of avoiding any heating of the bone, the connection portion has a bore for the passage of a lubricating fluid, the hole opening out into at least one channel formed in the active portion for directing the fluid as far as the point of the drill.
The active cutting portion has, longitudinally, helical flukes into which the channel or channels open.
In order to increase the rigidity of the drill assembly and to avoid any shearing effect, the active portion has, in the area of its connection to the rod, a cylindrical span of greater diameter.
The invention is explained in greater detail hereinafter with the aid of the attached drawings, in which:
FIG. 1 is a perspective view of one embodiment of the drill according to the invention.
FIG. 2 is a perspective view of another embodiment of the drill according to the invention.
FIG. 3 is a view in longitudinal section of the drill in the case where the latter is made entirely of plastic.
FIG. 4 is a view in longitudinal section of another embodiment of the drill.
FIG. 5 is a view in transverse section, on a larger scale, seen along the line 5.5 in FIG. 1.
FIG. 6 is a view in transverse section, on a larger scale, seen along the line 6.6 in FIG. 2.
FIG. 7 is a front view of the drill corresponding to the embodiment illustrated in FIG. 1.
FIG. 8 is a front view of the drill corresponding to the embodiment illustrated in FIG. 2.
The drill designated overall by (F) comprises a connection portion (1) in the form of a rod, and an active cutting portion (2). The portion (1) is designed at its free end (1a) so as to be coupled to any type of apparatus of the drilling machine type.
In the embodiment illustrated in
REFERENCES:
patent: 3460410 (1969-08-01), Briles
patent: 3991454 (1976-11-01), Wale
patent: 4135847 (1979-01-01), Hemmings
patent: 4526541 (1985-07-01), Hubschmid
patent: 5035618 (1991-07-01), Katz et al.
patent: 5100267 (1992-03-01), Salyer
patent: 5429504 (1995-07-01), Peltier et al.
patent: 5435722 (1995-07-01), Mandell
patent: 5489208 (1996-02-01), Mandell
patent: 5494382 (1996-02-01), Kloppers
LandOfFree
Drill for the insertion of a dental implant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill for the insertion of a dental implant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill for the insertion of a dental implant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1696910