Retention force of magnets in endosteal implants used for facial prosthesis

This study reports on forces generated by magnets to retain facial prostheses. The retention force was measured in cylindrical magnetic inserts and in telescope magnetic inserts. The forces between insert and secondary magnets were measured at different angles. The mean force in the axial direction was 1.8 N. The force decreased as the angle between force direction and insert-axis increased. The results will help clinicians to insert implants in an optimal position when using them to retain facial prostheses.