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Objective: To evaluate the vascular architecture of AVM of jaws on DSA., Methods: 12 cases of AVM of jaws comprised this study group, and 5 cases in maxilla and 7 cases in mandible, respectively. Seldinger technique was applied to carry out carotid angiography under the guidance of DSA machine (PHILIPS V3000)., Results: The DSA features of AVM of jaws included varix into the posterior area of jaws. The varix of the maxilla was supplied by the posterior superior alveolar artery and transversal facial artery when the soft tissue was involved, and the varix of the mandible was supplied by the inferior alveolar artery, maxillary and facial artery., Conclusion: Angiography is considered necessary for the diagnosis and embolization of AVM of jaws, and the varix is the center of lesion.

Objective: To evaluate the diagnostic value of CT for arteriovenous malformations (AVM) of jaws., Methods: 12 cases of central vascular malformations of jaws comprised this study group, 5 cases in maxilla and 7cases in mandible, respectively. The X-ray projection included panoramic radiography, Water's position and posterioanterior and lateral oblique view of mandible. The CT scans were obtained on Somatom ART and the axial and coronal scanning modalities were applied., Results: Radiographically different signs of the AVM of jaws were demonstrated, X plain film has no pathognomic features. The CT features included lytic expansion of bone, expanded space of marrow, obliteration of trabeculae and intact cortex of jaws. These signs were demonstrated very well in bone window setting. There were three forms of demonstrations of AVM of jaws as following: (1) local unilocular, (2) diffused unilocular, (3) multilocular., Conclusion: CT is helpful for early diagnosis of AVM of jaws, and can provide the guidance for the direct puncture embolization.

Objective: To report our experience to embolize the AVM of jaws by direct percutaneous puncture. in conjunction with endovascular therapy., Methods: 3 cases of AVM of mandible and 3 cases of AVM of maxilla comprised this study group. The patients were embolized with fibered coils, PVA and NBCA. The coils were placed directly into the center of the intraosseous lesion. The procedure was under the guidance of DSA machine (PHILIPS V3000)., Results: The acute arterial bleeding in 4 patients was controllable. The other two cases with oozing bleeding and a warm soft mass on the left face with a palpable pulse respectively, their symptoms and signs got improved a lot. The pericoronal oozing of blood in all patients disappeared during a 3 to 24 months follow-up and new bone formation was found in the follow-up radiography., Conclusion: The embolization of the AVM of jaws by direct percutaneous puncture in conjunction with endovascular therapy is effective and safe, however the longer follow-up is expected.

Objective: To evaluate the embolization of arteriovenous malformations of the maxillofacial region with PVA., Methods: 8 cases (male:3, female:5) of arteriovenous malformations of the maxillofacial region comprised this study group. The embolic material used was PVA (Polyvinyl Alcohol Foam) particles (250-500 microm) injected using 4.0 to 3.0 French-size catheters, catheterized selectively in the feeding pedicles of the AVM under the guidance of DSA machine (PHILIPS V3000)., Results: Five patients were embolized an a single session, and three patients needed two sessions. Immediate angiographical results showed total disappearance of the AVMs in all patients. Swelling, pulsation, and bruit were disappeared after embolization. Pericoronal oozing of blood and acute arterial bleeding was controllable. Local pain, swelling,and low-grade fever usually lasted from 3 to 7 days after embolization., Conclusion: The embolization of arteriovenous malformations of the maxillofacial region with PVA is effective and safe, and the longer follow-up is expected.

OBJECTIVE:To compare the results of CT-assisted double-contrast arthrography and MRI in the diagnosis of adhesion of TMJ. MATERIAL:18 patients with adhesion of TMJ were examined by CT-assisted double-contrast arthrography and MRI, and their results were analysed including position, degree and with or without osseous changes. RESULTS:18 cases of adhesion were demonstrated on CT-assisted double-contrast arthrography, and that only 6 cases of them were diagnosed on MRI.CONCLUSION: CT-assisted double-contrast arthrography is more sensitive and accurate than MRI in demonstrating the disk adhesion of TMJ.

OBJECTIVE:To introduce double-contrast arthrography of TMJ with reformatted sagittal and coronal CT imaging and to evaluate the value of its application in the diagnosis of temporomandibular joint dysfunction. METHODS: 14 patients in whom diagnosis can not be established with conventional arthrography were examined by double contrast arthrography with reformatted sagittal and coronal CT imaging. RESULTS: In double-contrast arthrography with CT imaging, 1 case was normal;1 case had anterior displacement with reduction;2 cases were anterior displacement without reduction, and 8 cases were with disk adhesion. CONCLUSION:The double contrast arthrography with reformatted sagittal and coronal CT imaging was a very important alternative to conventional arthrography, and has special value to demonstrate adhesion of TMJ.

OBJECTIVE:To evaluate the role of CT in the diagnosis of temporomandibular joint dysfunction MATERIAL: 48 temporomandibular joints of 26 patients suspecting osseous changes were examined by CT, with 1mm of layer thickness. All patients had Sch llers position projection as comparison. RESULTS:CT is more sensitive to detect the osseous changes of TMJ than Sch llers position projection, but not well demonstrating sclerosis of TMJ. The Sch llers position projection can only shows the lesion of lateral 1/3 of condyle, but CT including total condyle. CONCLUSION: CT is an important and sensitive tool in detecting osseous changes of temporomandibular joint.