Distraction Osteogenesis of the Mandible Workup

Updated: Mar 08, 2016
  • Author: Dale A Baur, MD, DDS; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Workup

Laboratory Studies

Depending on the patient's age, at a minimum, complete blood count, platelet count, and coagulation studies should be performed.

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Imaging Studies

A panoramic radiograph should be obtained. This imaging provides the surgeon with better visualization of mandible morphology. A preoperative planned osteotomy is drawn in the diagnosis tracing; it should include maxilla and mandible. The PA cephalometric radiograph is another diagnostic tool, used to determine the amount of vertical and transverse (horizontal) mandibular distraction. It is the best film for determining vertical distraction due to better visualization of both mandibular angles. A diagnostic tracing of the PA cephalometric radiograph is made, as well as a drawing of the osteotomy to correspond with the diagnostic tracing of the Panorex.

Complicated cases may require CT scans with 3-dimensional reconstruction and stereolithographic models to help in planning the location of the osteotomy and the vector of distraction.

Mounted dental models on a semiadjustable articulator are often helpful in determining the vector of distraction, and optimizing the dental occlusion.

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