2001年 大阪歯科大学歯科矯正学講座入局
2005年 同大学院歯学研究科博士課程(歯科矯正学専攻)修了
博士(歯学)の学位取得 『 TADの形態が顎骨の応力分布に及ぼす影響について』
2006年 大阪歯科大学歯科矯正学講座講師(非常勤)就任
2007年 日本矯正歯科学会認定医取得
2007年 岡下矯正歯科開業(橿原市)
2011年 28th Best award of Case presentation AORK受賞
2012年 日本成人矯正歯科学会春季セミナー「TAD(矯正用インプラント)埋入後どう使うの?どう使っているの?」—TADを用いた矯正治療の実際と臨床的使用法—口演
2016年 the 1stAsian Lingual Orthodontic Meeting :Speaker
2016年 日本舌側矯正歯科学会認定医取得
2017年 Kyung-Hee University Visiting Associate Professor of Orthodontics就任

3 July

The 7 keys to prevent failure when using anchor screws



4 July

Title of Talk

Factors related to survival rate of orthodontic anchor screw


There are many clinical reports on the residual ratio of orthodontic anchor screws (hereinafter referred to as screws), but the statistically more meaningful reporting is required as the number of cases is not sufficient. This time, I examined the cause of falling off from the planting position, age and dropout timing for a total of 1008 screws planted in Okashita Orthodontic Dentistry.
The place to be implanted is (1) maxillary buccal side 56 and between 67 (group A) 275 ② maxillary palatal side 56 and between 67 (group B) 562 ③ maxillary medial palatal suture (C group) 171 did. I conducted an F test between each two groups, and a significant difference was observed at a level of 1% or less in each of the A group B group and the A group C group. Therefore, it was suggested that the dropout rate of the screw varies depending on the implantation position. Also, although there was no significant difference between age groups, the falling time was 70% or more within 3 months after implantation. From the above results, it seems that an anatomical feature of the implantation site and histologic degeneration after implantation are involved in the dropout of the screw.