Effects of Direct Currents on Bone Growth into Delrin Implants

F. Buch From the Laboratory of Experimental Biology, Department. of Anatomy, University of Goteborg, the Institute for Applied Biotechnology (Head: PA. Brinemark) and the Department of Applied Electronics (Head: B. Magnusson), Chalmers Uniuersiiy of Technology, Goteborg and Siemens-Elema AB, Solna, Sweden

T. Albrektsson From the Laboratory of Experimental Biology, Department. of Anatomy, University of Goteborg, the Institute for Applied Biotechnology (Head: PA. Brinemark) and the Department of Applied Electronics (Head: B. Magnusson), Chalmers Uniuersiiy of Technology, Goteborg and Siemens-Elema AB, Solna, Sweden

E. Herbst From the Laboratory of Experimental Biology, Department. of Anatomy, University of Goteborg, the Institute for Applied Biotechnology (Head: PA. Brinemark) and the Department of Applied Electronics (Head: B. Magnusson), Chalmers Uniuersiiy of Technology, Goteborg and Siemens-Elema AB, Solna, Sweden

Abstract

The delrin Bone Growth Chamber (BGC) which is a dividable implant, was inserted in its assembled form in the tibia1 metaphysis of the rabbit. The BGC allows numerical estimation of the bone growth into the implant, based on microradiography and microdensitometry that permits evaluation of direct current (DC) effects on bone regeneration. A test chamber was inserted in one tibia and was stimulated with either 5, 20 or 50 pA for three weeks, while on the contralateral side of the same animal, control implant was inserted under identical conditions as the test, but was not stimulated. The results showed significant increase of bone growth with 20 and 50 FA and a tendency towards more bone formation with 5 pA.

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Effects of Direct Currents on Bone Growth into Delrin Implants

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Effects of Direct Currents on Bone Growth into Delrin Implants

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