#8 Longitudinal Study of Magnetic Attachments ーInvestigation of Probing Depth on Abutment teeth ー
R.Ito , K.Hoshiai , Y.Tanaka , T.Ishigami＊, K.Ishibasi＊＊ , E.Bando＊＊＊ , H.Sasaki＊＊＊＊
Department of Removable Prosthodontics , School of Dentistry, Aichi-Gakuin University Department of Partial Denture Prosthodontics , Nihon University School of Dentistry＊ , Department of Fixed Prosthodontics , School of Dentistry ,Iwate Medical University＊＊ , 　 Department of Fixed Prosthodontics , Institute of Health Biosciences Graduate School The University of Tokushima＊＊＊ , Sasaki Dental clinic＊＊＊＊
At present, magnetic attachments have been applied clinically in various cases. It’s useful to carry out postoperative investigations and to confirm results, as it shows the criterion of the clinical application1). Thus , magnetic attachments can be used safely. Prospective investigation of magnetic attachments has been carried out since 2003 at the Japanese Society of Magnetic Applications in Dentistry. （JSMAD） 　The results of prospective observation of magnetic attachments from the point of the transition of PD for 5 years are below. ・ PD of the abutment teeth were increased over 5 year period. ・ Significant differences were found between initial PD and PD of 5 years later for maxillary plates , resin plates, and for females.