Coralline hydroxyapatite bone graft substitutes in a canine metaphyseal defect model: radiographic-biomechanical correlation

Radiographic and biomechanical assessment of a new type of bone graft substitute derived from reef-building sea coral was performed in a canine metaphyseal defect model. Blocks of this material and autogenous iliac crest graft were implanted, respectively, into the right and left proximal tibial met...

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Bibliographic Details
Published in:Skeletal radiology 1986-01, Vol.15 (8), p.635-641
Main Authors: SARTORIS, D. J, HOLMES, R. E, TENCER, A. F, MOONEY, V, RESNICK, D
Format: Article
Language:English
Subjects:
Absorptiometry, Photon
Animals
Biological and medical sciences
Biomechanical Phenomena
Disease Models, Animal
Dogs
Hydroxyapatites
Medical sciences
Orthopedic surgery
Prostheses and Implants
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Tibial Fractures - diagnostic imaging
Tibial Fractures - surgery
Tomography, X-Ray Computed
Transplantation, Autologous
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Summary:Radiographic and biomechanical assessment of a new type of bone graft substitute derived from reef-building sea coral was performed in a canine metaphyseal defect model. Blocks of this material and autogenous iliac crest graft were implanted, respectively, into the right and left proximal tibial metaphyses of eight dogs. Qualitative and quantitative radiographic evaluation was performed in the immediate postoperative period and at 6 months after surgery. Biomechanical testing was carried out on all grafts following harvest at 6 months, as well as on nonimplanted coralline hydroxyapatite and autogenous iliac cancellous bone. In contrast to autografts, incorporation of coralline implants was characterized by predictable osseous growth and apposition with preservation of intrinsic architecture. Greater percent increase in radiographic density, higher ultimate compressive strength, and lower stiffness with incorporation were documented advantages of coralline hydroxyapatite over autogenous graft. Densitometric measurements correlated moderately with strength for both types of graft material (r = -0.65). These promising results have important implications to the clinical application of coralline hydroxyapatite bone graft substitutes as an alternative to autogenous grafting.
ISSN:0364-2348
1432-2161
DOI:10.1007/BF00349860