Dental magnetic attachement

摘要

A dental magnetic attachment has been invented that can improve durability by preventing the wear of an attractive face and attracted face. The dental magnetic attachment (1) comprises a keeper embedded in a tooth root, and a magnetic assembly (4) that attracts the keeper by magnetic attract force. The magnetic assembly (4) has a yolk (42) that comprises a base part (421) and a lateral wall part (422), a permanent magnet (41), a soft-magnetic shield (43) and non-magnetic seal (44). The attractive face (401) of the magnetic assembly (4) and the attracted face (301) of the keeper (3) are coated by the wear-resistant film (6) with greater than 400Hv of Vickers hardness. <IMAGE>