Volume 31, Issue 9 pp. 784-790

Effect of platelet-released growth factors and collagen type I on osseous regeneration of mandibular defects

A pilot study in minipigs

Gabor Fuerst

Gabor Fuerst

Department of Oral Surgery, University of Vienna School of Dentistry, Vienna, Austria

Ludwig Boltzmann Institute for Oral Implantology, Vienna, Austria

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Gruber Reinhard

Gruber Reinhard

Department of Oral Surgery, University of Vienna School of Dentistry, Vienna, Austria

Ludwig Boltzmann Institute for Oral Implantology, Vienna, Austria

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Stefan Tangl

Stefan Tangl

Department of Oral Surgery, University of Vienna School of Dentistry, Vienna, Austria

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Martina Mittlböck

Martina Mittlböck

Section of Clinical Biometrics, Department of Medical Computer Sciences, Vienna Medical School, University of Vienna, Vienna, Austria

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Fidel Sanroman

Fidel Sanroman

Department of Animal Pathology at the Veterinary Faculty, University Complutense, Madrid, Spain

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Georg Watzek

Georg Watzek

Department of Oral Surgery, University of Vienna School of Dentistry, Vienna, Austria

Ludwig Boltzmann Institute for Oral Implantology, Vienna, Austria

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First published: 28 July 2004
Citations: 23
Address:
DDr Gabor Fuerst
Abteilung für Orale Chirurgie
Universität für Zahn-, Mund- und  Kieferheilkunde Wien
Währingerstrasse 25a
A-1090 Wien
Austria
Fax: 0043/1/4277 67019
E-mail: [email protected]

Abstract

Objective: To study the effects of platelet-released growth factors (PRGF) and collagen type I on bone defect healing in minipig mandibles.

Material and Methods: In eight adult minipigs defects were trephined in the facial mandibular wall from extra-oral and filled with collagen+PRGF or with collagen alone. Control defects were left untreated. PRGF were defined as the supernatants obtained after centrifugation of washed, thrombin-activated allogenic cells of platelet-rich plasma. The animals were sacrificed at 4 and 8 weeks. For histological analysis, undecalcified ground specimens stained with the Levai–Laczko stain were used.

Results: For the entire follow-up, the amount of newly formed bone was 35.49±3.84% in the collagen+PRGF group, 46.34±3.84% in the collagen-only group and 33.83±4.11% in the controls. The differences between the collagen+PRGF and the collagen-only group (p=0.0343), and between the collagen-only group and the controls (p=0.0305) were significant. Histologically, defects filled with collagen+PRGF showed inflammatory reactions at 4 weeks, and new bone formation near the remnants of the filler collagen was reduced.

Conclusion: The data suggest that collagen type I alone, but not its combination with PRGF can support the early stages of cortical bone repair.

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