title: A long-term evaluation of osteoinductive HA/beta-TCP ceramics in vivo: 4.5 years study in pigs.
abstract: It has been proved that some material-dependent calcium phosphate ceramics have intrinsic potentials to induce osteogenesis. But there is little literature concerning about the tissue response in long-term. The aim of this study is to evaluate the safety of the osteoinductive biocreamics and the stability of the newly formed bone after long-term tissue response. Porous calcium phosphate ceramics rods which contain hydroxyapatite (HA) and beta-tricalcium phosphate (beta-TCP) were implanted in the dorsal muscles of Banna Minipig Inbreding Line. After 4.5 years, all the implanted rods with surrounding tissues were harvested and stained with hematoxylin and eosin for histological observation. The 7 months' rods were also harvested as short-term comparison. The histological results showed that compared with the short-term rods, amount of bone tissue formed after 4.5 years. And the newly formed bone in this bioceramics neither disappeared nor gave rise to uncontrolled growth. The bone growth in this bioceramics seemed to be self-confined. The surrounding soft tissues were normal and no tumor cell was found. We conclude that instead of disappearing or giving rise to out of control, the induced bone tissue trends to be further matured. And this bioceramics thus might have potentials in future clinical use.
authors.affiliation: Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, West China Hospital, Sichuan University, Chengdu 610041, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Ye
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Lu
authors.forename: Bing
authors.initials: B
authors.lastname: Lu
authors.forename: Jinjing
authors.initials: J
authors.lastname: Wang
authors.forename: Yujun
authors.initials: Y
authors.lastname: Shi
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Jingqiu
authors.initials: J
authors.lastname: Chen
authors.forename: Youping
authors.initials: Y
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Bu
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000033:anatomy & histology / Q000502:physiology; D001861:Bone Regeneration / Q000502:physiology*; D018786:Bone Substitutes / Q000737:chemistry / Q000494:pharmacology; D001842:Bone and Bones / Q000033:anatomy & histology / Q000502:physiology; D002130:Calcium Phosphates / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry / Q000494:pharmacology*; D017886:Durapatite / Q000737:chemistry*; D008422:Materials Testing; D018482:Muscle, Skeletal / Q000033:anatomy & histology / Q000502:physiology; D013552:Swine; D013997:Time Factors
chemical_list: D018786:Bone Substitutes; D002130:Calcium Phosphates; C485817:beta-tricalcium phosphate; D017886:Durapatite