ISSN:
0021-9304
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Medizin
,
Technik allgemein
Notizen:
The central theme of our studies is concerned with finding a better means of tooth replacement. This goal is being realized for a “tailor-made” polymer and associated techniques of usage have been developed for this purpose. In the course of doing this, we have introduced the polymer implant concept by which materials can be tailor made to serve different functions.The polymer composition currently considered best for these studies contains clear polymethacrylate powder and liquid monomer, blowing agent (dinitrosopentamethylene tetramine), anorganic bone, and N-tributyl phosphate. This mixture is heat processed in a plaster mold at 300° F for 30 min. The processed implant is sandblasted to remove its outer skin and to open the pores on the implant's surface to the host's tissues when implanted. This formulary has resulted in the totally self-supporting replica implant becoming a reality in baboons. Two Papio-Anubis baboons', both with 8 incisors (4 upper and 4 lower) were replaced with polymer replicas, and after 3 months the splints were severed and the 16 implants remained totally self-supporting. Metals have been coated with this polymer formula, and polymer coated pins have been used successfully as supports for fixed prostheses and as endodontic stabilizers. The internal metal piece imparts increased strength without bulk, while the polymer coating allows for attachment to the implant. The untoward effects of metals, such as heat transfer, electrical and corrosive phenomena are diminished or eliminated. This “happy union” of the two materials allows the implant to be strong and well integrated into the host. The Polymer Implant Concept holds a genuine hope for the future. In this instance it provides for a better means of tooth replacement: one which is cosmetically and functionally excellent. Most probably it will have an important place in the neurosurgical, orthopedic, and medical fields as well.
Zusätzliches Material:
9 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/jbm.820070314
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