Implant-supported prosthesis placed in the distraction-augmented alveolar bones: review of 2 cases

Kim, Han Seok; Kim, Myung Rae; Lee, Seong Geun; Kang, Sang Won; Kim, Ki Hwan; Kim, Hyeong Seob

Abstract

OBJECTIVE
This is to report the effectiveness of intraoral distraction osteogenesis for alveolar augmentation in the extremely atrophied alveolar defects and to review the clinical results of the 2 cases.
SUBJECTS AND METHODS
Anterior segmental osteotomy was performed and the trans-oral alveolar distractors( Martin, Germany) were applied in 2 patients with the severe acquired anterior maxillary and mandibular defect. After latent period for 1 week, the osteomized alveolar segments were distracted by 1 mm a day (0.5 mm/1 turn) for 8 days in case I and 0.6 mm a day(0.3 mm/1 turn) for 10 days in case II. The consolidation period was about 8 weeks in each case. Thereafter, 6 titanium threaded implants (Branemark, Restore) were simultaneously installed with removal of distractor. The implants were tested clinically and radiographically.
RESULTS
Amounts of acquired alveolar bone were 8 mm in case I and 6 mm in case II respectively, with the increased width of the ridge crests and soft tissue expansion. Dental implants installated on the augmented alveolar ridges in 8 weeks after distraction were confirmed as in good osseointegration and in good function without any complications.
CONCLUSION
Intraoral distraction osteogenesis can be a good option for alveolar ridge augmentation of the severely atrophied ridges and soft-tissue defects. However, for the better vector control of distracting segments and for anterior esthetics, customized distraction devices could be considered later.