High strength fibers of l -lactide copolymers,...

Details High strength fibers of l -lactide copolymers,... High strength fibers of l -lactide copolymers,...

2007-03-20

2007-03-20

Lewis, Kim M. (Department: 3772)

Surgery

Instruments

Suture or ligature

C606S231000, C525S415000, C528S354000

Reexamination Certificate

active

09862093

ABSTRACT:
The present invention is directed to crystalline copolymers of l-lactide and a minor portion of a cyclic monomer, preferably ε-caprolactone or trimethylene carbonate or both. The present copolymers have a melting temperature of at least 150° C. and a crystallinity of at least 20%. Preferred are high molecular weight copolymers having an inherent viscosity of at least 1.1 dl/g. A variety of surgical constructs may be formed from the present copolymers. Surgical sutures made of mono- or multifilament yams of the present copolymers will bioabsorb in less than three years and will maintain at least 50% of their initial strength three weeks post-operatively.

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S.W. Shalaby and R.A. Johnson, Chap. 1 (Synthetic Absorbable Polyesters), pp. 1-34,Biomedical Polymers, (Shalaby, Ed.), Hanser Publishing, NY, 1994.
B.C. Benicewicz, et al., Chap. 14, vol. 433 (In Vitro and In Vivo Degradation of Poly(L-lactide)Braided Multifilament Yarns); pp. 161-166,ACS Symp. Series, Am. Chemical Soc., Washington, DC, 1990.

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