In vitro effect of microwave irradiation on the retentive force of magnets.

Statement Of Problem: Few studies have addressed the possible effect(s) of microwave irradiation on the magnetic properties of "permanent" magnets during the fabrication of dental and maxillofacial prostheses.

Purpose: The objective of this study was to investigate the influence of microwave irradiation energy on the retentive force of a magnetic attachment system used in maxillofacial prosthetic rehabilitation.

Material And Methods: A heat-polymerized PMMA disk (6 cm in diameter) was fabricated.