No abstract

Midpalatal implant was developed as a new orthodontic implant system in 1996, Switzerland. Until now, there is no clinical statistical report involved in the midpalatal implant including the removal in Japan. The aim of this study is to report clinical statistics of orthodontic patients using the midpalatal implants and to propose an application of collagenous sponge material to the defect after the removal of the midpalatal implant. Forty-three patients (thirty-four females and 9 males, operation age: 15 years 3 months to 39 years 5 months, mean age: 21 years 10 months) received one screw-type endosseous implant each (lengths: 4 or 6mm, diameter: 3.3mm; Orthosystem ® , Institute Straumann, Switzerland) for maximum orthodontic anchorage. The success rate of the initial midpalatal implants (fixture length: 6mm) was 96.3% (26/27), while the success rate of the length of 4mm was 75.0% (12/16). In all cases, the success rate of the initial midpalatal implants was 88.4%