Histomorphometric and mechanical analysis of the hydroxyapatite-bone interface after electromagnetic stimulation

Author:

Fini M.1,Giavaresi G.1,Giardino R.1,Cavani F.2,Cadossi R.3

Affiliation:

1. Experimental Surgery Laboratory, Research Institute Codivilla-Putti, Rizzoli Orthopaedic Institute, Via di Barbiano 1/ 10, 40136 Bologna, Italy.

2. Department of Anatomy and Histology, University of Modena and Reggio Emilia, 41100 Modena, Italy.

3. Laboratory of Clinical Biophysics, ICEmB IGEA Srl, Via Parmenide 10/a, 41012 Carpi, Modena, Italy.

Abstract

We investigated the effect of stimulation with a pulsed electromagnetic field on the osseointegration of hydroxyapatite in cortical bone in rabbits. Implants were inserted into femoral cortical bone and were stimulated for six hours per day for three weeks. Electromagnetic stimulation improved osseointegration of hydroxyapatite compared with animals which did not receive this treatment in terms of direct contact with the bone, the maturity of the bone and mechanical fixation. The highest values of maximum push-out force (Fmax) and ultimate shear strength (σu) were observed in the treated group and differed significantly from those of the control group at three weeks (Fmax; p < 0.0001; σu, p < 0.0005).

Publisher

British Editorial Society of Bone & Joint Surgery

Subject

Orthopedics and Sports Medicine,Surgery

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