PMID: 16634491Apr 26, 2006

Histomorphometric and fluorescence microscopic evaluation of interfacial bone healing around 3 different dental implants before and after radiation therapy

The International Journal of Oral & Maxillofacial Implants
Michael WeinlaenderHanns Plenk


Radiation therapy influence on bone healing around 3 types of endosseous dental implants in dogs was evaluated. Implants with 3 different surfaces (A = machined commercially pure titanium screws, B = commercially pure titanium plasma spray-coated cylinders, C = hydroxyapatite [HA] -ceramic coated cylinders) were first implanted unilaterally into the right posterior edentulous mandibles of 7 dogs as nonirradiated controls. After 12 weeks without functional loading and after sequential fluorochrome labeling these implants were retrieved by block dissection. In this same surgery, implants were placed on the contralateral side. Three weeks postimplantation the implant-containing hemimandibles were Cobalt 60 irradiated with the biologic equivalent of 5,000 cGy. Twelve weeks postimplantation and after labeling these irradiated implants were retrieved at sacrifice. On scanning electron, light, and fluorescence microscopic images of undecalcified longitudinal ground sections of the implants with surrounding tissues, percent bone-to-implant contact (% BIC), bone formation, and remodeling were histometrically and subjectively evaluated. Woven bone formation started 1 week after implantation at the implant interfaces on both the nonirradi...Continue Reading

Related Concepts

Cobalt Radioisotopes
Endosseous Implant Procedure
Canis familiaris
Scanning Electron Microscopy
Immunofluorescence Microscopy
Surface Properties
Wound Healing
Dental Prostheses, Surgical

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