The effects of low-intensity pulsed ultrasound on bioabsorbable self-reinforced poly l-lactide screws

The effects of low-intensity pulsed ultrasound on the mechanical and molecular properties of self-reinforced poly l-lactide (SR-PLLA) screws were studied in vitro. SR-PLLA screws of 4.5 mm diameter were exposed on low-intensity ultrasound for 1, 3, 6, 9, and 12 weeks. After exposure, the bending str...

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Veröffentlicht in:	Biomaterials 2002-07, Vol.23 (13), p.2733-2736
Hauptverfasser:	Handolin, Lauri, Pohjonen, Timo, Partio, Esa K., Arnala, Ilkka, Törmälä, Pertti, Rokkanen, Pentti
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorbable Implants Absorption Bioabsorbable SR-PLLA implant Biocompatible Materials - chemistry Bone Screws Lactic Acid - analogs & derivatives Lactic Acid - chemistry Low-intensity ultrasound Mechanical properties Molecular properties Molecular Weight Polyesters - chemistry Polymers - chemistry Stress, Mechanical Time Factors Ultrasonics
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Zusammenfassung:	The effects of low-intensity pulsed ultrasound on the mechanical and molecular properties of self-reinforced poly l-lactide (SR-PLLA) screws were studied in vitro. SR-PLLA screws of 4.5 mm diameter were exposed on low-intensity ultrasound for 1, 3, 6, 9, and 12 weeks. After exposure, the bending strength, shear strength, and molecular weight were investigated. There were no differences in the investigated properties between the ultrasound exposure and control groups. We found no evidence that low-intensity ultrasound has any effect on the mechanical or molecular properties of SR-PLLA screws in vitro. The present results suggest that biodegradable SR-PLLA fixation devices are compatible with low-intensity ultrasound in vitro.
ISSN:	0142-9612 1878-5905
DOI:	10.1016/S0142-9612(02)00006-6