Imaging Studies
CT assists in the definition of the extent of the required resection. Evidence of bone resorption is best appreciated by the direct examination of specific bone-enhancing images (bone windows). The printout of life-sized images (1:1 reproductions) and the creation of templates have been described as useful in mandibular reconstruction. These templates can assist the surgeon with molding and recontouring the flap, but these techniques are not widely available and can be costly.
A panoramic radiograph is reportedly effective in predicting bone involvement by overlying squamous cell carcinoma. The additional benefit of demonstrating the presence of dental pathology, which may alter the decision to extract or maintain teeth, also should be considered.
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Iliac crest tissue transfer. Exposure of the external oblique fascia. Note the planned incision 2.5 cm medial to the iliac crest.
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Iliac crest tissue transfer. Incision of the external oblique allows exposure of the internal oblique. The dissection is in an avascular plane and extends to the costal margin superiorly and the linea semilunaris medially.
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Iliac crest tissue transfer. The vascular pedicle is shown with the lateral femoral cutaneous nerve lying just beneath it.
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Iliac crest tissue transfer. The donor site is managed by direct approximation of the iliacus and transversalis muscles. The closure is completed by securing a mesh to the residual ilium and the external oblique fascia.
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Iliac crest tissue transfer. The harvested flap before contouring.
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Iliac crest tissue transfer. Flap inset to the mandibular defect. Note opening osteotomies are filled with cancellous bone particles. The muscle is then wrapped around the bone to provide a soft-tissue coverage and a seal of the oral cavity.
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Iliac crest tissue transfer. An early postoperative film demonstrates that the bone harvest can equal the dimensions of the resection site.