title: Degradation behaviors of bioabsorbable P3/4HB monofilament suture in vitro and in vivo.
abstract: The biodegradable behaviors of monofilament suture made from bacterial biopolyester poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P3/4HB) was investigated both in lipase solution and by implant into rat tergal muscles. Results showed that the monofilament suture lost its tensile strength gradually accompanied by decrease of molecular weight. The suture retained approximately 65% of its original strength after lipase degradation for 12 weeks, whereas the molecular weight decreased from 4.5 x 10(5) to 3.8 x 10(5). However, the crystallinity of the suture, after lipase degradation for 12 weeks, increased from 27 to 33%. This may ascribe to improve orientation arrangement of molecular chain in the monofilament after the fragment from amorphous regions dissolved in the buffer solution. The roughness of surface morphology increased with degradation. Rat implantation showed no remarkable tissue responses during in vivo degradation. Foreign body reactions were much milder than chromic catgut, which is one of the most common commercially available sutures.
authors.affiliation: Multidisciplinary Research Center, Shantou University, Shantou, Guangdong 515063, China.
authors.forename: Xianyu
authors.initials: X
authors.lastname: Chen
authors.forename: Xiaodi
authors.initials: X
authors.lastname: Yang
authors.forename: Jueyu
authors.initials: J
authors.lastname: Pan
authors.forename: Liang
authors.initials: L
authors.lastname: Wang
authors.forename: Kaitian
authors.initials: K
authors.lastname: Xu
mesh_terms: D020341:Absorbable Implants; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002398:Catgut; D005260:Female; D006885:Hydroxybutyrates / Q000737:chemistry*; D007249:Inflammation / Q000473:pathology; D008049:Lipase / Q000737:chemistry; D008422:Materials Testing; D051379:Mice; D008807:Mice, Inbred BALB C; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D011091:Polyesters / Q000737:chemistry*; D051381:Rats; D013537:Sutures; D013718:Tensile Strength; D013816:Thermodynamics; D000094122:Polyhydroxybutyrates
chemical_list: D001672:Biocompatible Materials; D006885:Hydroxybutyrates; D008049:Lipase; D011091:Polyesters; C068056:poly(3-hydroxybutyrate-co-4-hydroxybutyrate); D000094122:Polyhydroxybutyrates