Izvorni znanstveni članak
Examination of the Retention of Sm-Co5 and Nd-Fe-B Magnets
Tihomir Kuna
Vlado Carek
Irina Filipović-Zore
Joško Grgurević
Zoran Ivasović
Sažetak
When planning retention one of the most important tasks is to ensure that the construction, size and form of the retentive elements enable the transfer of forces which the loaded tissues can accept without damage. The use of magnets fabricated from biocompatible materials is becoming increasingly used as a means of retention for total and partial prosthetic replacements and resectional prostheses. The purpose of this study was to examine factors on which the strength of retentive forces Sm-Co5 and Nd-Fe-B magnets depend. The samples were divided into two groups: 28 pairs of Sm-Co5 magnets and 28 pairs of Nd-Fe-B magnets. The heights of the measured magnets were 2, 2.5 and 3 mm. Each sample consisted of a group with lateral force and a group without lateral force. The force values were measured by means of a device for measuring magnetic retentive forces, which enables the measurement of retentive forces of different combinations of permanent magnets and ferromagnetic materials. The results are presented in figures and tables. The basic factors that influence the magnitude of the retentive magnetic force are the type of magnet, size, their mutual distance and the presence of lateral forces. The values obtained indicate which sizes and thickness of the magnetic pairs should be used for the desired force of retention.
Ključne riječi
retention; Sm-Co5; Nd-Fe-B magnets
Hrčak ID:
11424
URI
Datum izdavanja:
15.12.2001.
Posjeta: 2.821 *