Feng Yimiao, Fang Bing, Shen Guofang, Xia Yunhui, Lou XinTian
Department of Stomatology, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Sep;110(3):e1-7. doi: 10.1016/j.tripleo.2010.03.039. Epub 2010 Jul 4.
The paper reports a custom-made trifocal transport distractor assisted by miniscrew implant anchorages (MIAs) used to reconstruct maxillary defects and evaluates the clinical results of function and esthetics.
Eight patients aged 19-43 years who suffered regional maxillary defects were involved. Each one underwent segmental bone excision of the maxilla and distraction osteogenesis (DO) in the defect region by a custom-made interoral 3-dimensional distractor which was activated by orthodontic elastic force assisted by MIAs at the rate of <or=1 mm/d.
New arced bone was found and filled the defect. The average amount of distraction was 13.6 mm (range 10-18 mm). Occlusion relationship was restored via this method, with subsequent placement of oral implants and prosthesis. The regenerated bony segment can be bent to form a curved arch.
A combined orthodontics and DO technique can be used to treat partial maxillary defects successfully.
