Does surface anodisation of titanium implants change osseointegration and make their extraction from bone any easier?

J. D. Langhoff; J. Mayer; L. Faber; S. B. Kaestner; G. Guibert; K. Zlinszky; J. A. Auer; B. von Rechenberg

doi:10.1055/s-0037-1617362

Veterinary and Comparative Orthopaedics and Traumatology, Inhaltsverzeichnis

Vet Comp Orthop Traumatol 2008; 21(03): 202-210
DOI: 10.1055/s-0037-1617362

Original Research

Schattauer GmbH

Does surface anodisation of titanium implants change osseointegration and make their extraction from bone any easier?

J. D. Langhoff

¹Musculoskeletal Research Unit, Equine Hospital, Vetsuisse Faculty ZH, University of Zurich, Zurich, Switzerland

,

J. Mayer

²TECIM Technologies for Implants and Materials, Niederlenz, Switzerland

,

L. Faber

³DePuy ACE SARL, LeLocle, Switzerland

,

S. B. Kaestner

⁴Veterinary Anaesthesiology, Equine Hospital, Vetsuisse Faculty ZH, University of Zurich, Zurich, Switzerland

,

G. Guibert

⁵Centre d’analyse par faisceau ionique (CAFI), Institut des Microtechnologies Appliquées-Arc Neode, La chaux-de-fonds, Switzerland

,

K. Zlinszky

¹Musculoskeletal Research Unit, Equine Hospital, Vetsuisse Faculty ZH, University of Zurich, Zurich, Switzerland

,

J. A. Auer

¹Musculoskeletal Research Unit, Equine Hospital, Vetsuisse Faculty ZH, University of Zurich, Zurich, Switzerland

,

B. von Rechenberg

¹Musculoskeletal Research Unit, Equine Hospital, Vetsuisse Faculty ZH, University of Zurich, Zurich, Switzerland

› Institutsangaben

Abstract

Summary

Objectives: Titanium implants have a tendency for high bone-implant bonding, and, in comparison to stainless steel implants are more difficult to remove. The current study was carried out to evaluate, i) the release strength of three selected anodized titanium surfaces with increased nanohardness and low roughness, and ii) bone-implant bonding in vivo. These modified surfaces were intended to give improved anchorage while facilitating easier removal of temporary implants. Material and methods: The new surfaces were referenced to a stainless steel implant and a standard titanium implant surface (TiMAX™). In a sheep limb model, healing period was 3 months. Bone-implant bonding was evaluated either biomechanically or histologically. Results: The new surface anodized screws demonstrated similar or slightly higher bone-implantcontact (BIC) and torque release forces than the titanium reference. The BIC of the stainless steel implants was significant lower than two of the anodized surfaces (p=0.04), but differences between stainless steel and all titanium implants in torque release forces were not significant (p=0.06). Conclusion: The new anodized titanium surfaces showed good bone-implant bonding despite a smooth surface and increased nanohardness. However, they failed to facilitate implant removal at 3 months.

Keywords

Titanium - anodised implants - removal torque - bone-implant bonding - sheep

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Referenzen

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