著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Ekelund,Implant treatment in the edentulous mandible: a prospective study on Brånemark system implants over more than 20 years,Int J Prosthodont,,,2003,16,,602,https://cir.nii.ac.jp/crid/1370848657246666242,