objectives: to show the results from the first patients presenting with sleep obstructive apnea syndrome (soas) of skeletal peripheral type treated in our country with osteogenesis by mandibular distraction. methods: nine patients were treated with bilateral mandibular osteogenic distraction using leibinger and synthes distraction devices. latency period was of 72 hours. mandibular distraction rate at 1,0 mm each 12 hours and restraint was of 8 weeks. then, postsurgical orthodontics treatment was started. results were assessed by polysomnography and cephalometry studies before intervention, after it and at a year of treatment. results: the 89 % of cases had a good recovery, the 11 % showed an improvement. complications included: a temporary limitation of mouth opening in 55 % disappearing with physiotherapy and two patients needed tracheostomy for anesthetic purposes. conclusions: osteogenesis by mandibular distraction was an effective therapeutical method for treatment of peripheral skeletal soas.