official journal of the patent office - Controller General of Patents ...

(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 00334/KOLNP/2005 A
(22) Date of filing of Application: 03/03/2005 (43) Publication Date: 09/06/2006
(54) Title of the invention: PREPARATION FOR FIXING TO A NATURAL PIECE OF TOOTH OR TO A TOOTH AND
CORRESPONDING FIXING METHOD
(51) International classification : A61K 6/00, A61L
27/50
(31) Priority Document No : 1460/02
(32) Priority Date : 23/08/2002
(33) Name of priority country : SWITZERLAND
(86) International Application No and : PCT/CH03/000549
Filing Date
: & 15/08/2003
(87) International Publication No : WO 04/017927
(61) Patent of addition to Application No : NA
Filed on : NA
(62) Divisional to Application No : NA
Filed on : NA
(57) Abstract:
A preparation (10, 11,12, 13) to be fixed to a natural tooth part or
tooth, in particular for the replacement of a load-bearing tooth part, is
for example a filling for a drilled-out tooth (1), a crown, bridge or
prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a
tooth root for fastening an artificial tooth part. The preparation has
surface regions which Consist of a material with thermoplastic
properties. The preparation (10, 11, 12, 13) has Oscillation
properties with such low damping losses that for a liquefaction of the
material with thermoplastic properties by way of oscillations there are
local stress concentrations required, and in a manner such that such
stress concentrations only occur in the region of the preparation
surface. The preparation is positioned on a suitably prepared natural
tooth part in a manner such that the material with the thermoplastic
properties is in contact or may be brought into contact with the dentin
surface and/or eneme1 surface. The preparation is then made to
mechanically oscillate and is simultaneously pressed against the
natural tooth part, whereby the material with the thermoplastic
properties is at least partly liquefied and brought into intimate contact
with the dentin or enamel surface in a manner such that after
solidification it forms a positive fit and/or material fit connection.
Teeth restored with such preparations have a high stability and a long
life, which in particular is attributed to the fact that the thermoplastic
material, in contrast to known cements used for the same purpose,
shrinks less and has the ability to relieve internal stress by creeping.
The thermoplastic material is also able to equalise inaccuracies
between the natural tooth part or tooth and further artificial elements,
therewith reducing the known high accuracy requirements asked for
in dental technology.
(FIG). 2
(71) Name of Applicant:
WOODWELDING AG.,
Address of the Applicant:
BUNDESSTRASSE 3, 6304 ZUG,
SWITZERLAND.
(72) Name of the Inventor:
MAYER JORG
AESCHLIMANN MARCEL
TORRIANI LAURENT
Filed U/S 5(2) before The Patents (Amendment)
Act, 2005: NO
The Patent Office Journal 09/06/2006 10986