Double scan Aim Clinical indication Manufacturing scan prosthesis CT scan protocol Double scan registration wizard Aim Visualize tooth setup within CT images Implant planning can be based on both clinical and aesthetic considerations Visualize mucosa surface
Necessary for manufacturing of mucosasupported SurgiGuide Clinical indication Fully edentulous cases Maxilla Mandible Manufacturing scan prosthesis Good fitting removable denture No air between gingiva and prosthesis to avoid => false indication mucosa thickness
=> malfitting mucosa-supported SurgiGuide Prosthesis Material: acrylic resin No radio-opaque teeth No metallic parts Base plate minimally 2 mm thick
Manufacturing scan prosthesis Markers Radio-opaque material (e.g. gutta-percha, Titanium, Cavit) Shape: spherical Dimensions: app. 2 mm diameter Number: 8 (4 -15) Good distribution Spread over entire prosthesis Some close to tooth-gingiva border Some close to outer border prosthesis
CT scan protocol CT-scan of patient Patient must wear the scan prosthesis Positioning in scanner Cone Conventional Beam CT CT CT scan protocol CT-scan of patient
Image range Maxilla Conventional CT Cone Beam CT CT scan protocol CT-scan of patient Image range Mandible Conventional CT
Cone Beam CT CT scan protocol CT-scan of patient Scan parameters Matrix 512 x 512 Field of View 140 170 mm
Slice thickness 0.5 mm (max. 1.0 mm) Feed per rotation 1.0 mm Reconstructed slice increment 0.5 mm (max. 1.0 mm)
Reconstruction algorithm Bone or high resolution Gantry tilt 0 CT scan protocol CT-scan of prosthesis Positioning in scanner
Similar as positioned in patients mouth Cone Conventional Beam CTCT Maxilla Mandible CT scan protocol CT-scan of prosthesis
Fixation of prosthesis in scanner Use only radiolucent material At least more radiolucent than prosthesis itself Image range Full prosthesis - Scan parameters At least same as for patient scan, But higher resolution is allowed Double scan registration wizard Import scan of patient Scan registration wizard
Adapt box to only include radio-opaque markers! OR DICOM images of scan of prosthesis preferably in separate folder! Double scan registration wizard Import scan of patient Scan registration wizard
Possible to change threshold for prosthesis Possible to adapt box to only include prosthesis
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