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(12) Patent: | (11) CA 1220369 |
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(21) Application Number: | 1220369 |
(54) English Title: | SELF-ADAPTING RETENTIVE ENDODONTIC BUILD-UP POST |
(54) French Title: | PIVOT UTILISE DANS LES TRAITEMENTS DE LA PULPE DENTAIRE |
Status: | Term Expired - Post Grant |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | |
(74) Associate agent: | |
(45) Issued: | 1987-04-14 |
(22) Filed Date: | 1984-12-21 |
Availability of licence: | Yes |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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ABSTRACT
1. SELF-ADAPTING RETENTIVE ENDODONTIC BUILDUP-POST.
Core buildups of endodontically treated teeth the
crowns of which are fractured, weakened, or destroyed
by caries can be done in basically 2 ways:
- cast post and core
- prefabricated posts with metal cores or cores in
combination with acrylics.
Retention is achieved through cementation, threads on
the post, or a combination of the two. In order to
achieve the best possible hold and to prevent stress of
surrounding tissue, most prefabricated post systems re-
quire preliminary precision drilling. Due to the use
of these cylindrical posts, two problems often occur.
First of all, in teeth which have tapered canals or
slender roots, perforation of the canal wall can occur.
Secondly, in teeth with very large or very asymmetrical
canal lumen, sufficient actual retention can be very
difficult to achieve. Although the treatment of choice
in such cases is the cast post, in comparison to the pre-
fabricated post it is work and time consuming.
The objective for my invention was the development
of a pre-fabricated endodontic post that is simple and
time saving, and can also be used in flaring or very
oval canals without comprising the clinical strength or
- 1 -
stability necessary for the core build-up. I have named
this the self-adapting retentive endodontic build-up post,
hereafter called the S.A.R. Post.
- 2 -
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1220369 was not found.
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Description | Date |
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Inactive: IPC deactivated | 2017-09-16 |
Inactive: IPC assigned | 2017-01-01 |
Inactive: IPC expired | 2017-01-01 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: Expired (old Act Patent) latest possible expiry date | 2004-12-21 |
Grant by Issuance | 1987-04-14 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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HANS-WERNER WEISSKIRCHER |
Past Owners on Record |
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None |