title: Mandibular symphyseal distraction osteogenesis: review of three techniques.
abstract: Mandibular symphyseal distraction osteogenesis (MSDO) is an alternative strategy to correct mandibular transverse deficiencies and dental crowding. Only a limited number of practitioners have reported their clinical experience and potential complications of this procedure to widen the mandible in a large case series. This study involved retrospective analysis of 40 patients who underwent mandibular symphyseal distraction osteogenesis. Three different types of distractor were used to widen the mandible: tooth-borne in 21 patients, bone-borne in 5 patients and hybrid (both bone and tooth-borne) in 14 patients. The distraction amount ranged from 7 to 11 mm (mean 7.31 mm). While 39 patients underwent successful mandibular symphyseal distraction, there was one failure. Most of the complications were experienced in bone-borne distractors, such as breakage of the distractor rod, gingival recession, secondary infection and ptosis of the chin. In the light of these findings, it is suggested that a lingually placed tooth-borne hyrax appliance is more suitable and reliable than the other distraction devices. Further larger studies are needed in order to better evaluate the effectiveness of bone-borne or hybrid devices.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Erciyes University, Kayseri, Turkey. alperalkan@erciyes.edu.tr
authors.forename: A
authors.initials: A
authors.lastname: Alkan
authors.forename: M
authors.initials: M
authors.lastname: Ozer
authors.forename: B
authors.initials: B
authors.lastname: Baş
authors.forename: M
authors.initials: M
authors.lastname: Bayram
authors.forename: N
authors.initials: N
authors.lastname: Celebi
authors.forename: S
authors.initials: S
authors.lastname: Inal
authors.forename: B
authors.initials: B
authors.lastname: Ozden
mesh_terms: D000293:Adolescent; D002648:Child; D002680:Chin / Q000601:surgery; D004868:Equipment Failure; D016267:External Fixators / Q000009:adverse effects; D005260:Female; D005889:Gingival Recession / Q000209:etiology; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000601:surgery*; D008334:Mandible / Q000601:surgery*; D019857:Osteogenesis, Distraction / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods*; D012189:Retrospective Studies; D013530:Surgical Wound Infection / Q000209:etiology