title: Bone marrow-derived osteoblasts seeded into porous beta-tricalcium phosphate to repair segmental defect in canine's mandibula.
abstract: BACKGROUND
  Bone regeneration is often needed for many aesthetic and reconstructive procedures. Tissue engineering provided a promising approach to supplement existing treatment strategies. In this study, we aimed to evaluate the effect of reconstructing mandibular defect by using bioceramics seeded with bone marrow derived osteoblasts.
  
  
  METHODS
  Canine's autologous marrow stromal cells were Culture-expanded and induced to osteoblastic phenotype, then were seeded into prepared porous beta-tricalcium phosphate, after being incubated in vitro. The cell/ scaffold complexes were implanted into the prepared defect in canines' mandibula and fixed by internal rigid fixation. In control groups, beta-tricalcium phosphate alone and autologous iliums were implanted into the prepared defects. Twelve weeks after implantation, the specimens were examined macroscopically and histologically.
  
  
  RESULTS
  In experimental group and autologous iliums group, new bone grafts were successfully developed at 12 weeks after implantation and repaired the continuity of the mandibula. Histologically, newly formed bone could be observed on the surface and in the pores of beta-tricalcium phosphate in the cell/scaffold group, whereas incomplete bone repair was found in pure beta-tricalcium phosphate group.
  
  
  CONCLUSIONS
  The harvested bone marrow derived osteoblasts possess the ability to form new bone tissue when seeded onto porous beta-tricalcium phosphate, which shows the potential of using this method to repair large segmental mandibular defect clinically.
authors.affiliation: Department of Oral and Maxillofacial Surgery, College of Stomatology, Fourth Military Medical University, Xi'an, China. wuweidds@126.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Wu
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Chen
authors.forename: Tianqiu
authors.initials: T
authors.lastname: Mao
authors.forename: Fulin
authors.initials: F
authors.lastname: Chen
authors.forename: Xinghua
authors.initials: X
authors.lastname: Feng
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000008:administration & dosage*; D001860:Bone Plates; D002130:Calcium Phosphates / Q000008:administration & dosage*; D004195:Disease Models, Animal; D004285:Dogs; D007085:Ilium / Q000166:cytology; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D016348:Osseointegration; D010006:Osteoblasts / Q000637:transplantation*; D011859:Radiography; D019651:Plastic Surgery Procedures / Q000295:instrumentation / Q000379:methods; D023822:Tissue Engineering
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; C485817:beta-tricalcium phosphate