Mini-screw implant anchorage-assisted distraction osteogenesis for reconstruction of partial maxillary defect.

PURPOSE: To evaluate the usefulness of self-made distraction osteogenesis instrument by orthodontic technique and mini-screw implant anchorage-assisted distraction osteogenesis (DO) to reconstruct partial maxillary defects. METHODS: Eight patients suffering from partial maxillary defects were selected. Their ages ranged from 19 to 43 years and the average age was 33.2 years. There were 5 males. After a special instrument was fabricated, elastic force trifocal distraction was performed by min-implant borne anchorage. Three months later the implants were implanted in the two distracted region and the prosthetic restorations were finished finally. RESULTS: In the areas of distraction osteogenesis, ossifications were fine and prosthodontic technique, and favourable occlusion was obtained. CONCLUSION: Combined orthodontic and DO techniques can reconstruct partial maxillary defect successfully and restore the complicated anatomical contour of the maxilla, especially the dental-alveolar bone. [ABSTRACT FROM AUTHOR]