cone beam international magazine of cone beam dentistry

_One of the most important aspects of pre- operative staging in head and neck surgery is the preoperative determination of local bone invasion bythemalignancybecausepredictionoftheextentof thesurgicalprocedureisveryimportantforthesur- gical outcome. It is especially important if a tumour extends into bone structures, that is, the mandible, because it often requires a mandibulectomy. In ad- dition, for such cases, the supero-inferior extent of bone invasion is important for the surgeon to plan for either marginal or segmental mandibulectomy. According to current literature, the standard protocol for staging oral cavity malignancies in- cludes multi-slice computed tomography (MSCT) and MRI of the head and neck, CT, conventional 2-plane X-ray of the chest and abdominal ultra- sound. The results gathered from MSCT, MRI and CT are usually reviewed to determine whether local bone invasion has occurred. In 1998, cone beam computedtomography(CBCT)technologywasclin- icallyintroduced,allowing3-Ddiagnosisofthehard tissueofthefaceandjaws,thirdmolarsandsalivary calculi, as well as other indications. ThereisalsoevidencethatCBCTisapotentialtool intheassessmentoffacialskullboneinvasioncaused by oral cavity malignancies. Based on the newest data in the literature concerning the comparison of sensitivity and specificity, it can be concluded that 08 I I case report _ CBCT in maxillofacial surgery cone beam2_2014 Fig. 1_Oral squamous cell carcinoma of the anterior part of the alveolar mandibular ridge. Fig. 2_A CT scan in the axial view, in which there is no clear sign of bone invasion. Fig. 3_A CBCT scan showing the osteolytic zone of the lingual mandibular cortex. Fig. 4_Panoramic detail, linear quantification. CBCT-predicted marginal mandibular resection in patient withoralsquamouscellcarcinoma Authors_ Dr Drago B. Jelovac & Prof. Vitomir S. Konstantinović, Serbia Fig. 4Fig. 3 Fig. 2Fig. 1