title: Silk fibroin-based scaffolds for bone regeneration.
abstract: Porous scaffolds were prepared using regenerated Bombyx mori silk fibroin dissolved in water or hexafluoroisopropanol (HFIP). The effects of these two preparations on the formation and growth of new bone on implantation into the rabbit femoral epicondyle was examined. The aqueous-based fibroin (A-F) scaffold exhibited significantly greater osteoconductivity as judged by bone volume, bone mineral content, and bone mineral density at the implant site than the HFIP-based fibroin (HFIP-F) scaffold. Micro-CT analyses showed that the morphology of the newly formed bone differed significantly in the two types of silk fibroin scaffold. After 4 weeks of implantation, new trabecular bone was seen inside the pores of the A-F scaffold implant while the HFIP-F scaffold only contained necrotic cells. No trabecular bone was seen within the pores of the latter scaffolds, although the pores of these did contain giant cells and granulation tissue.
authors.affiliation: Department of Pharmacology, Nihon University School of Dentistry, Matsudo, Chiba 271-8587, Japan.
authors.forename: Noboru
authors.initials: N
authors.lastname: Kuboyama
authors.forename: Hideo
authors.initials: H
authors.lastname: Kiba
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Arai
authors.forename: Ryoichiro
authors.initials: R
authors.lastname: Uchida
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tanimoto
authors.forename: Ujjal K
authors.initials: UK
authors.lastname: Bhawal
authors.forename: Yoshimitsu
authors.initials: Y
authors.lastname: Abiko
authors.forename: Sayaka
authors.initials: S
authors.lastname: Miyamoto
authors.forename: David
authors.initials: D
authors.lastname: Knight
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Asakura
authors.forename: Norihiro
authors.initials: N
authors.lastname: Nishiyama
mesh_terms: D000818:Animals; D012831:Bombyx / Q000737:chemistry; D001861:Bone Regeneration; D005269:Femur / Q000166:cytology / Q000000981:diagnostic imaging / Q000502:physiology / Q000601:surgery; D005349:Fibroins / Q000737:chemistry*; D008297:Male; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D016348:Osseointegration; D020005:Propanols; D019736:Prostheses and Implants; D011817:Rabbits; D023822:Tissue Engineering; D054457:Tissue Scaffolds / Q000737:chemistry*; D014867:Water; D055114:X-Ray Microtomography; D006845:Hydrocarbons, Fluorinated
chemical_list: D005349:Fibroins; D020005:Propanols; D014867:Water; C001337:hexafluoroisopropanol; D006845:Hydrocarbons, Fluorinated