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Light and Transmission Electron Microscopy of the Intact Interfaces Between Non-submerged Titanium-coated Epoxy Resin Implants and Bone or Gingiva

University of Pennsylvania, School of Dental Medicine, 4001 Spruce Street, Philadelphia, PA 19104

D. Buser

Harvard University, School of Dental Medicine, Boston, MA, University of Berne, School of Dental Medicine, Berne, Switzerland

S.G. Steinemann

University of Lausanne, Department of Experimental Physics, Lausanne, Switzerland

K. Donath

University of Hamburg, Institute of Pathology, Hamburg, Germany

N.P. Lang

University of Berne, School of Dental Medicine, Berne, Switzerland

H.P. Weber

Harvard University, School of Dental Medicine, Boston, MA

This experiment was aimed at studying the intact tissue/implant interface of non-submerged dental implants with a titanium surface. Epoxy-resin replicas were fabricated from 3.05 x 8 mm cylindrical titanium implants with a plasma-sprayed apical portion and a smooth coronal collar. The replicas were coated with a 90-120-nm-thick layer of pure titanium and autoclaved. The coated replicas were inserted as non-submerged endosseous implants in the edentulous premolar region of dog mandibles and allowed to heal for three months. Jaw sections containing the implants were processed for light and electron microscopic study of the intact tissue/implant interface with and without prior demineralization. Gingival connective tissue fibers were closely adapted to the titanium layer, in an orientation more or less parallel to the implant surface. There was no evidence of any fiber insertions into the surface irregularities of the smooth or rough titanium surface. Undemineralized bone was intimately adapted to the titanium surface without any intervening space. In demineralized sections, the collagen fibers of the bone matrix tended to be somewhat thinner and occasionally less densely packed in the vicinity of the implant surface. However, they extended all the way to the titanium surface, without any intervening fibril-free layer.

Journal of Dental Research, Vol. 71, No. 2, 364-371 (1992)
DOI: 10.1177/00220345920710020401


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