Bone healing response to a synthetic calcium sulfate/ß-tricalcium phosphate graft material in a sheep vertebral body defect model.
J Biomed Mater Res B Appl Biomater
; 100(7): 1911-21, 2012 Oct.
Article
in En
| MEDLINE
| ID: mdl-22847979
ABSTRACT
The introduction of a material able to promote osteogenesis and remodelling activity in a clinically relevant time frame in vertebroplasty and kyphoplasty procedures may have patient benefit. We report the in-vivo performance of a biphasic synthetic bone graft material (Genex Paste, Biocomposites, UK) [test material], composed of calcium sulfate and ß-tricalcium phosphate, implanted into a sheep vertebral defect model. Cavities drilled into 4 adjacent vertebrae (L2 to L5) of 24 skeletally mature sheep were; (1) filled with the test material; (2) filled with commercially available polymethylmethacrylate [PMMA] cement; (3) remained empty [sham]. Analysis was performed immediately after implantation and at 8, 16, and 36 weeks post implantation. Sites were evaluated for bone growth with microCT analysis, histological examination, and mechanical testing under compression. The test material exhibited an improved tissue response over the PMMA, indicating a superior biological tolerance. MicroCT and histology indicated marked osteoregenerative capacity of the test material when compared with sham and the PMMA. The percentage of new bone formation was higher for the test material than sham at 16 and 36 weeks post implantation, with bone regeneration almost complete at 36 weeks in this group. Resorption of test material and the integration into new bone tissue were demonstrated.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Spinal Injuries
/
Spine
/
Bone Regeneration
/
Materials Testing
/
Calcium Phosphates
/
Calcium Sulfate
/
Bone Substitutes
/
Absorbable Implants
Type of study:
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
J Biomed Mater Res B Appl Biomater
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2012
Document type:
Article
Affiliation country: