Comparison of the two groups showed a higher rate of residual-free resections in cases of CAS application. Therefore, 60 patients diagnosed with a malignancy of the upper jaw has been treated, 31 with the use of CAS and 29 conventionally. The present study evaluated the beneficial use of CAS in the treatment of midfacial tumors with special regard to tumor resection and reconstruction. Computer assisted surgery (CAS) can provide the framework in this context. Therefore, the evaluation of the true three-dimensional tumor extent and the intraoperative availability of this information seem critical for a precise, yet substance-sparing tumor removal. In contrast, undertreatment followed by repeated re-resections can also not be an option. In some cases, this implied aggressive overtreatment with loss of the eye globe. Since decades, the surgeon’s goal of R0-resection has led to radical resections in the anatomical region of the midface because of the three-dimensionally complex anatomy where aesthetically and functionally crucial structures are in close relation.
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