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Histologic investigations on 33 retrieved Nobelpharma implants.

Journal article
Authors Tomas Albrektsson
A R Eriksson
Bertil Friberg
Ulf Lekholm
L Lindahl
M Nevins
V Oikarinen
J Roos
Lars Sennerby
P Astrand
Published in Clinical materials
Volume 12
Issue 1
Pages 1-9
ISSN 0267-6605
Publication year 1993
Published at Institute of Odontology, Department of Oral and Maxillofacial Surgery
Institute of Odontology
Institute of Surgical Sciences, Department of Biomaterials
Pages 1-9
Language en
Keywords Adult, Aged, Bone Resorption, etiology, Dental Implants, adverse effects, Female, Histological Techniques, Humans, Jaw, anatomy & histology, Male, Materials Testing, Middle Aged, Osseointegration, Prosthesis Design, Prosthesis Failure
Subject categories Surgical research


Thirty Nobelpharma implants were retrieved from 17 patients despite a remaining clinical stability, after between 1 and 16 years of clinical function. The reasons for implant removal were bone resorption in combination with soft tissue disorders, psychological causes, implant fracture and post mortem cases. When measured at the cortical passage, there was an average of 84.9% direct bone-to-implant contact and 81.8% average surface bone area in individual threads as evaluated in a computerized morphometric system at the light microscopic level.

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