Note: Descriptions are shown in the official language in which they were submitted.
CA 02452439 2004-O1-13
r ~ ,. ~' .,
~~ 9a~o7azs . ~. r9moo~sx
F~~ ~vz~a ~
~~t~ ~n~nt~~n
s
° The present x~ention relates to ~~:~ element comprising
at least ore cylindrical part to tae implanted into ne
tissue.
~ackgr~und tsr tie invention
There are two ~:~nds or~a~~s systems ~o~,.~° erado-osseous
dental implants which are commonly a~sed today
3~
The threaded fi~etures have some important advantages~ a
CA 02452439 2004-O1-13
ao~~~~~°~1,'~'a ~C~'~'°a~l~~~a~ ~bi~ ~~'~~~~I ~~sv L~~."~~
~~f~~~~'~~ ~as~~i a~:l,=
~~ ~.~a t ~~'~~ ~~~ ~~ ~n
~he~°~ a~~ ~~~~~~~ ~~~~ ~ ~~~~~ ~~' ~~~~~~~a~~g~~
!,_
~~~51~P~~'fs~~ ~~s~m'a ~~~~~~~i~'°~~l '~.~'v~p"?'c ~~Ffll;~~~'
°~~s~~~~' ~~'~~.~i P'"~~
~~~~~~~ ~c~ ~.~~~ '~c~ '~~~ 3~~~~r~~~ 5~r~~ ~~~~~~~
~~! ~F'~~ ~~~
s~~~~~'
~~~~e ~ ~~~.~~ ~~~~ a~~~~K~;~~ ~~ ~~~~1 '~~~ ~~~~ ~~ ~~:~~~.~~~~ ~~
i~°J?ate
~~~ °~~ ~~~~mm~~~~ c~~~~
~~~ ~~Yb ~~ 'w:i ~~~~~'i~W -1~,-.~i~ L"~ tbs.' ~4'.:0~ ~~~ ~~ ~a ~'~3~~~LyJv.-
.
~'~.:~~~~~~~~~~~~ ~ y~~ ~~ ~~~~~~~~c~
CA 02452439 2005-09-30
28371-29D
3
In accordance with this invention, there is
provided a dental implant having a body with at least one
generally cylindrical part to be implanted into bone tissue,
said generally cylindrical part being at least partly
provided with threads having a height in the range
0.02-0.20 mm characterised in that the distance between
adjacent threads, crest to crest, is approximately twice the
height of the threads.
Short description of the appended drawings
Fig 1 shows an overall view of an implant according
to the invention
Fig 2 shows a section of the implant in Fig 1 taken
along the line I - I
Fig 3 shows an end view according to the line
II-II in Fig 2
Fig 4 shows a first preferred embodiment of the
microthreads and Fig 5 a second preferred embodiment of the
microthreads
Detailed description of preferred embodiments of the
invention
A preferred embodiment of the invention comprises
an implant having a generally cylindrical body 1 for
insertion into a bore-hole in bone tissue. The envelope
surface of the body 1 is provided with very small threads 2,
herein called micro-threads since their dimensions are in the
micrometer range. These threads will allow the implant to
function as a screw. The forward end or the tip of the screw
CA 02452439 2005-09-30
28371-29D
3a
is provided with three cutting edges 4 in conjunction with
chip-collecting cavities 3. A result of the presence of the
chip-collecting cavities is that parts of the cylindrical
part are not provided with threads. In view
CA 02452439 2004-O1-13
~.~~~~a~~~ ~a~~ ~~.~ ~~ ~~~ ~~~.~~
~~ ~~~1~~;~ ~~~ ~~~~~ ~~~~ ~~t~ ~ ~
~~ ~ °-~t~~~
~h~~~i ~a~~ ~~ ~~~ ~~~:~~ (~~a '
~~~~~~ ~~a~ o ~a
~~1~~~~~~.t~ (~~ ,~y.~:ris ~SL~,s~~~~i°~~ P(~~' ~~~ii~~,~GILF(2t3~f
'~n~~ ~'~~~''~'~ 'sm~'~~~<z~t~'?
~~~~~.~~~ ~~ s~~~~~~~~ ~~ ~Fa~~~~~ ~ ~~~ ~~~ c~~ ~~:~ L
~c~~~ ~~k~~ ~ ~~~~ ~~ ~ ~.Qa
~~ ~~~~u~~~~ ~Ed~ ~~~~~~~~~ ~ ~~~~4~'~ f 'ice.
~dl~~Pg~ ~~~'~ '~~' J~S~(~~ f'~'~HS' '~b~l)~ 'L~J~,"~"~~~! 1L~ ~ ~ '~'' ~ "'a~
o ~~s'~
~'i~~~~.~ '~~~~~~ ~~~~ ~~~~~~~a~r
~~'u~~~ c~5n ~.~
CA 02452439 2004-O1-13
4/0742
P :..,~3/ 7
The thread ~hc~~~ a.~'~.~ offers :~~~~a the tr~~d in
f~.4 mainly a.~ that the ~rag~~ et~~the f.~~
~.nst~a~f ~k ~
~ r~~ra9~r~erate~. ~a~~~ h~ar~ras<~~~~r i~~si~an~~ fir
a.n~t~c~ ~ta~r~~ b~a~tq~ng t~chn~.~.e~ gay
su~~i.~p~se~the t~a~~d~.
~'e alar~t he o~ee~ ~ta ~~1~.ricl ~ ~°~~
~~rf~ed ~.mI~r~t r1 ~tYareac~e~ .~~n~rat ee~e~~~~
CA 02452439 2004-O1-13
i
~' ;~~~~~s ~~~~~'"
~~e~~a~~ c~
~~ ~~~~~i
~a~~~~~'~ ~~ ''~~~ ~~',8h~~ ~.!1~'' .c~°'~.~ c~a~
~C~:~dM~Ef6~~~~s~.~ll~ ~L~1~.I;~''~'~ r.4~S,~..~~.~'
~~ ~~~~1~~~c~ ~ ~cL~~~ ~j~ ~v~~~ ~~~~,~=~~:~~~ U s~~~ ~ ~~~ ~r~c~~~ a
f~~°~~ ~~~~~~~r-~ ~~>~ ~~~~c~~~ ~~~~~~~~ :~~~a~~~°~:~,~~ s~c~r
~.~~ ~ o ~°~a~.~ c~~~~~ ~c~ ~~ia~~~ ~~,'~~~~nc~9~°~ ~~~es~~~~~
~'~~~ ~e~~°~~~.~~~ ~~~.~
~°~~c~~~r ~a~'~ ~~~~~ ~~,s..~~ ~~a~ ~~~~~ ~~ 'i.~~ ~~~~~'~.~'~~~.
~er'=~°~~_~au_e.~'
"~~.~lFn~ ~~'t~~,5~~G3~'~s~l.~.~~ '°~~~.~~~~Z>~i ~~.1 ~, ~~
~~''.~~.~~'s~8
~~w ~~~'~~~~~~~~ .'
h~ ~~.~~~~ ~~ ~~~~~~ ~~~~~.~~~ ~~~~~'~~~~ ~.~a ~~~ ~~~e~ss~~
~ ~ ~~e~°°~w~~~ ~~ ~~~ ~ ~w~?~ ~.
~~~~~~e~ c ~~~~ ~j~~~ ~~~~ ~~~~~r~ ~~~ ~~~~~~~.~~ ~r~ ~~~.~
~u~~~~~ ~~~~~~~~~~ ~~~ ~~~ ;~~~~'~~~e~ ~~b~~~.~~~~ ~~
CA 02452439 2004-O1-13
;~
- WO 94/07428 PC'~ c93/00788
7
bone tissue in the upper jaw and either can be inserted
as a self-tapping screw with a minimum of cutting
action or, more importantly, can be just pushed or
gently tapped into a bore-hole in the upper jaw.
A further advantage of the invention is that also
small, narrow implants will have a maximal stiffness or
rigidity which may be important in view of a correct
transfer of the main, axial loads to the surrounding
to bone tissue, since the the threads will form a
comparatively small portion of the entire cross-section
of the implant. -
As mentioned above, the implant also can be used in the
same way as a conventional screw-threaded implant, in
which case the hole bored in the bone tissue should
have a diameter corresponding to the minor diameter of
the thread or somewhat larger. In the latter case, the
force needed to cut the threads in the bone tissue will
be less.
It should be noted that the invention can be varied in
many ways within the scope of the appended claims. It
should for instance be emphasized that the invention is
not limited to dental implants and that the invention
could be applied to any generally cylindrical implant
to be inserted into a generally cylindrical bore.
Generally cylindrical in this context should be read as
having parts coinciding with the envelope surface of a
cylinder circumscribing the implant. A screw-shaped
implant having a fluted body (in similarity with a tap}
' thus for instance is to be within the scope of the
protection as conferred by the appended claims.
