A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
83/27, 83/28, 83
A61C 13/10 (2006.01) A61C 5/04 (2006.01) A61C 13/30 (2006.01)
Patent
CA 1220369
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 -
470769
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