Alveolar Ridge Augmentation Using Distraction Osteogenesis: Preliminary Report Of 3 Cases

ABSTRACT

Distraction osteogenesis (DO)is a surgical process for reconstruction of combined deficiencies in bone and soft tissue. It involves gradual, controlled displacement of surgically created fractures which results in simultaneous expansion of soft tissue and bone volume. Due to the late introduction of healing by DO in the field of odontology, alveolar DO is increased. The process of alveolar DO involves osteotomy in the area of deficiency, fixation of a healthy segment of bone adjacent the deficient site, transport, and maintenance of newly formed bone. After a 7-or 10-day latency period for soft tissue healing,distraction is performed at the rate of 0.5mm twice a day fully to 7mm.The distractor is then maintained for consolidation after distraction for 10-to 12 weeks.After consolidation, the distractor is removed.Improvement of vertical bone regeneration was achieved in all cases.The resultant distraction zone is filled with natural bone,consistent with the distraction osteogenesis concept. This results in mature cortical bone at the crest for enhanced implant stability and prosthodontic treatment.