3D-OBERFLÄCHEN-MATCHING BEI NAVIGATIONSGESTÜTZTEN MUND-, KIEFER- UND GESICHTSCHIRURGISCHEN EINGRIFFEN

Sl Vanous lypcs regislration procedures i i K l i u l n u : skin adhesive inarkers and bone anchored nun UM s \ \ f iv used dimcally. Ilowever, existing regislu i inn iochnic|ucs aro inadequate in cranioniaxillüfacial s i i i L ' c i v due to time restraint and invasiveness. New dcvdoped suifacc laser scanning technique offer an i n t v M c s t i n g approach to register the patienl for surgical n a x i g a t i o n . In this sludy, surface laser registralion lechiik|uc and user algürilhm were evaluated in craniomaxillotauul surgery using image-guided navigation. Twenty f'our patients undergoing craniomaxillofacial surgery \ v i t h image-guided navigation were analyzed. Preoperat i \ c compuled tomography (CT) data were acquired \ \ i i h l ( > l m e inultisclice CT-scanner (Siemens Somatom Sensation 1 (> ) . All patients were registered using surface laser scanning technique. Accuracy values for anatomical landmark loealization were compared. The average error of the patient registration procedure determined äs mean square error" (RMSE) was 1.21 (0.34) mm. The inean clinical accuracy for landmark localisation was l .<S (0.5) mm. Surface laser scanning techniques is a simple handling, non-invasive and clinical useful patient registration technique for image-guided craniomaxillofacial surgery.