title: Histologic Evaluation of Osseous Regeneration Following Combination Therapy With Platelet-Rich Plasma and Bio-Oss in a Rat Calvarial Critical-Size Defect Model.
abstract: Platelet-rich plasma (PRP) is an autogenous source of growth factors shown to facilitate human bone growth. Bio-Oss, an osteoconductive xenograft, is used clinically to regenerate periodontal defects, restore dental alveolar ridges, and facilitate sinus-lift procedures. The purpose of this study was to analyze whether a combination of PRP and Bio-Oss would enhance bone regeneration better than either material alone. PRP and/or Bio-Oss were administered in an 8-mm critical-size defect (CSD) rat calvarial model of bone defect between 2 polytetrafluoroethylene membranes to prevent soft tissue incursion. Eight weeks after the induction of the CSD, histologic sections were stained with hematoxylin and eosin stain and analyzed via light microscopy. Qualitative analyses revealed new bone regeneration in all 4 groups. The Bio-Oss and PRP plus Bio-Oss groups demonstrated greater areas of closure in the defects than the control or PRP-only groups because of the space-maintaining ability of Bio-Oss. The groups grafted with Bio-Oss showed close contact with new bone growth throughout the defects, suggesting a stronger graft. The use of PRP alone or in combination with Bio-Oss, however, did not appear to enhance osseous regeneration at 8 weeks. Areas grafted with Bio-Oss demonstrated greater space-maintaining capacity than controls, and PRP was an effective vehicle for placement of the Bio-Oss. However, at 8 weeks this study was unable to demonstrate a significant advantage of using PRP plus Bio-Oss over using Bio-Oss alone.
authors.affiliation: 1  US Army Dental Activity, Dental and Trauma Research Detachment, Fort Sam Houston, San Antonio, Tex.
authors.forename: Philip J
authors.initials: PJ
authors.lastname: DeNicolo
authors.affiliation: 2  Department of Clinical Investigation, D. D. Eisenhower Army Medical Center, Fort Gordon, Ga.
authors.forename: M Kelly
authors.initials: MK
authors.lastname: Guyton
authors.affiliation: 3  Private Practice, Mount Pleasant, SC.
authors.forename: Michael F
authors.initials: MF
authors.lastname: Cuenin
authors.affiliation: 4  Private Practice, Vancouver, Wash.
authors.forename: Steven D
authors.initials: SD
authors.lastname: Hokett
authors.affiliation: 5  Department of Oral Biology, Medical College of Georgia, Augusta, Ga.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Sharawy
authors.affiliation: 6  College of Dental Medicine, Western University of Health Sciences, Pomona, Calif.
authors.forename: James
authors.initials: J
authors.lastname: Borke
authors.affiliation: 2  Department of Clinical Investigation, D. D. Eisenhower Army Medical Center, Fort Gordon, Ga.
authors.forename: James C
authors.initials: JC
authors.lastname: McPherson
mesh_terms: D000818:Animals; D001861:Bone Regeneration; D018786:Bone Substitutes; D006801:Humans; D008903:Minerals; D053657:Platelet-Rich Plasma; D051381:Rats
chemical_list: C077540:Bio-Oss; D018786:Bone Substitutes; D008903:Minerals
keywords: Bio-Oss; bone regeneration; platelet-rich plasma