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Query: UMLS:C0019270 (hernia)
 15,856 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Development of the iliac crest microsurgical free flap has significantly enhanced the surgical restoration of the mandible. A decade of heavy clinical use has established the versatility and efficacy of this technique. A recent literature review suggests a 96% success rate has been achieved. This donor site provides a long vascular pedicle, appropriately shaped bone, skin, and soft tissue. These properties enable tailoring of the flap to precisely fit the defect. The flap has overcome bone size and movement restrictions imposed by regional pedicles. The retained blood supply induces rapid fracture-like healing and provides metabolic independence from the recipient bed. Incorporating an internal oblique muscle island enhances flap utility. The muscle provides a source of oral lining and sanctions the reconstruction of compound defects with a single flap. In an effort to refine the bony component and reduce donor site morbidity, the principal author has introduced the split inner cortex modification. This method has eliminated abdominal wall weakness and hernia, while improving postoperative pelvic contour. The split inner cortex microsurgical iliac crest free flap is the current standard for oromandibular reconstruction in our institution. Additional refinements to internal fixation, TMJ restoration, and osseointegration have resulted in a more refined, comprehensive reconstruction.
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PMID:The iliac crest microsurgical free flap in mandibular reconstruction. 811 11

Cadaver material was used in this study to correlate sequential sagittal and coronal T1-weighted magnetic resonance images against anatomic detail. Magnetic resonance imaging (MRI) was found to accurately represent soft tissues in normal and deranged joints. In contrast to previous reports, MRI was found to accurately represent the discal-retrodiscal junction and did not appear to give false positive findings for disc displacement. Magnetic resonance imaging provided good images of bony outline, particularly in coronal views. Difficulties in interpretation arose when different adjoining tissues produced the same MR image; the central tendon of the lateral pterygoid muscle can appear as an extension of the disc, imaging as a distorted and displaced disc. In anatomic sections, a medial hernia sac in the lower joint space was seen as a constant indicator of the medial component of disc displacement; however, this was not evident in sagittal and coronal T1-weighted images. Fibrocartilaginous remodeling of the articular surface projecting into a discal perforation presented the same image as normal discal tissue. Because discs are often thinned over the lateral pole, it is difficult to determine whether discal tissue is present between the articular surfaces when MRI is at its present resolution. Subcortical bone spaces may be misinterpreted as areas of avascular necrosis and osteochondritis dissecans. It is recommended that an imaging sequence of the TMJ include a midcondyle image and lateral, central, and medial sagittal images; however, the lateral sagittal image is the most difficult to interpret.
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PMID:Correlations between anatomic and MRI sections of human cadaver temporomandibular joints in the coronal and sagittal planes. 916 Dec 26