Abstract: bjective　To evaluate treatment outcomes ofmandibular complete denture supported bytwo endosteal magnetic-at- tachment implants in edentulous patients with severe mandibular alveolar ridge absorption.Methods　Eight edentulous patients with severe mandibular alveolar ridge absorption were chosen. Each of themwas treated with a complete denture supported by two CDIC implants. The implants were inserted at the areas of two the first premolars respectively. After five months, two magnets were adhered to the inside of the complete dentures.Retention,masticatory efficiency and maximal masticatory force were measured before and after the magnets were adhered and six months later.Results　Statistical analysis revealed that retention, masticatory efficiency and maximal masticatory force were all increased after the magnetswere adhered (P<0·01) and sixmonths later(P< 0·01).Conclusion　Retention, maximal masticatory force and masticatory efficiency were significantly increased after the en- dosteal magnetic attachment implants were applied. It is concluded that mandibular complete denture supported by two endosteal magnetic attachment implants is an effective method for severe alveolar ridge absorption cases.

Key words: complete denture, magnetic-attachment, retention, masticatory efficiency, masticatory force