[3D mandibular distraction planification in a case of severe XXXX ].

@entity1 @entity21383 @entity3947 @entity509 @entity2270 @entity85 @entity7439
INTRODUCTION: When occurring in childhood, @entity21383 joint is responsible for complex @entity85 , including mandibular growth deficiency. We present a case of temporomandibular joint @entity3947 associated with severe mandibular asymmetry treated by mandibular bone distraction performed under computer assistance. OBSERVATION: A 27-year-old @entity1 presented with a severe @entity7439 consisting in @entity509 of the left hemi-mandible and maxilla. Mouth opening was non-existent. The CT-scan showed a left @entity21383 . A left mandibular distraction was decided. The distraction characteristics (choice and positioning of the distractor, @entity2270 and amount of distraction) were determined preoperatively on the 3D CT-scan. The planning has been transferred to a navigation console (Kolibri(  ), Brainlab(  )). A combined intraoral and cutaneous was performed. Navigation allowed for an appropriate placement of the osteotomy line and fixation of the distractor. Distraction was started at the 5th postoperative day at the rate of 1mm per day and lasted 25 days without complication. DISCUSSION: 3D planning allows for better indication setting, better preparation of the procedure, reducing complications and operative time. It may help as an educational tool for young surgeons and for a better understanding from the @entity1 . Navigation is an accurate method for the transfer of the planning in the operation room.
