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'''Bone segment navigation''' is a surgical method used to find the anatomical position of displaced bone fragments in fractures, or to position surgically created fragments in craniofacial surgery. Such fragments are later fixed in position by [[osteosynthesis]]. It has been developed for use in [[craniofacial]] and [[oral and maxillofacial surgery]].
After an accident or injury, a fracture can be produced and the resulting bony fragments can be displaced. In the oral and maxillofacial area, such a displacement could have a major effect both on facial aesthetics and organ function: a fracture occurring in a bone that delimits the [[orbit (anatomy)|orbit]] can lead to [[diplopia]]; a [[Human mandible|mandibula]]r fracture can induce significant modifications of the [[occlusion (dentistry)|dental occlusion]]; in the same manner, a skull ([[neurocranium]]) fracture can produce an increased [[intracranial pressure]].{{cn}}
In severe congenital malformations of the facial skeleton surgical creation of usually multiple<ref>{{Cite journal|last=Obwegeser|first=HL|date=1969|title=Surgical correction of small or retrodisplaced maxillae. The "dish-face" deformity.|journal=Plast Reconstr Surg|volume=43|issue=4|pages=351–65|doi=10.1097/00006534-196904000-00003|pmid=5776622|s2cid=41856712}}</ref><ref>{{Cite book|title=Craniofacial Surgery 3|last1=Cutting|first1=C|last2=Grayson|first2=B|last3=Bookstein|first3=F|last4=Kim|first4=H|last5=McCarthy|first5=J|publisher=Monduzzi Editore|year=1991|isbn=9788832300000|editor-last=Caronni|editor-first=EP|___location=Bologna|chapter=The case for multiple cranio-maxillary osteotomies in Crouzon's disease.}}</ref> bone segments is required with precise movement of these segments to produce a more normal face.
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