Original scientific paper
Effect of Prosthesis Lateral Movement on the Value of Magnetic Retention Force
Vlado Carek
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Vjekoslav Jerolimov
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
Retention and methods of its measurement in mobile prostheses have long attracted attention of many investigators. The aim of this study was to determine the effect of prosthesis lateral shifts on the retention final value obtained by magnetic alloys. Experiments were performed in a sample of 157 pairs of magnetic alloys, their magnetic force being influenced by lateral forces. Measurements were carried out at the Institute of Physics, University of Zagreb. All magnetic alloy specimens were intact, of exact diameter and height, and of smooth and polished surface. Magnet diameter ranged from 4-7.1 mm, and their height was 2, 2.5 and 3 mm. The values of retention forces between two SmCo5 magnets of identical or different dimensions were measured in the sample. The measurements were performed on a magnetic dynamometer, a device constructed for this purpose. The mean value of retention in the sample with lateral magnet shift was 1.71, 1.31 and 1.08 N at a distance of 0.4, 1 and 1.6 mm, respectively.
Keywords
prosthesis retention; magnetic alloy SmCo5
Hrčak ID:
99094
URI
Publication date:
15.3.1995.
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