Memory of DL-polylactic acid biodegradable plates
| Autor: | O. Moritz, Janice F. Lalikos, Losken Hw, Michaeli W, von Oepen R, Albert Losken, Tschakaloff A, Mark P. Mooney |
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| Rok vydání: | 1994 |
| Předmět: |
medicine.medical_specialty
Chemical Phenomena business.industry Chemistry Physical Polymers Polyesters Biomaterial equipment and supplies Surgery Molecular Weight chemistry.chemical_compound Biodegradation Environmental Polylactic acid chemistry Lactates Medicine Animals Lactic Acid Rabbits Composite material business Bone Plates |
| Zdroj: | Annals of plastic surgery. 32(6) |
| ISSN: | 0148-7043 |
| Popis: | Biodegradable plates and screws have many advantages over metal plates and screws. Plates were injection-molded and made of DL-polylactic acid. Four-hole plates were bent with the use of a heated tip to angles of 30, 45, and 60 degrees. They were inserted in the subcutaneous space in the back of rabbits. After 2 weeks, the plates straightened, suggesting that the plates had a memory. The results were confirmed by similar in vitro investigations. The in vitro experiment was repeated with tempering of the plates. The plates were heated to a temperature of 200 degrees C for 45 seconds, cooled, and then again heated to 200 degrees C for 40 seconds. This process resulted in loss of memory of the plates. After 4 weeks, there was a change of the bending angle of less than 2.5 degrees. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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