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Delivered by:  The National Centre For Product Design + Development Research (PDR).
Contact:          
Dr Dominic Eggbeer.  deggbeer-pdr@cardiffmet.ac.uk  02920 416 703 

Digital Anatomical Reconstruction involves computer aided design procedures to provide models or imagery of modified scan data-derived anatomy.  The results are used to save clinicians timereduce model costsimprve accuracy of pre-bending jigs and so reduce the likelihood of repeat surgeries.

 

They should be ordered as [MODIFIED MEDICAL MODELS] using the same process.

 

We aim to deliver on any specific, unique request; though common applications are described below.

 

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DEFECT-FILLED CRANIOPLASTY JIG

 

The craniotomy defect is filled in CAD software.  The patch is blended into the contours of the surrounding area.  Contours of the contralateral side are matched visually as appropriate. Accuracy is ensured by precise digital measurement comparisons between common anatomical landmarks.  A minimally sized model is provided (defect area + 20mm margin) to reduce costs.  Time is saved by removing the laborious task of ‘waxing-up’ or hand-carving the defect-fill in clay.  From this stage, the traditional laboratory fabrication process continues as usual with flasking and pressing. 

 

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ORBITAL FLOOR / MEDIAL WALL RECONSTRUCTION 

Contralateral healthy anatomy is enhanced and mirrored.  The mirrored piece is positioned visually and blended into the surrounding area to achieve a smooth boundary.  Appropriate symmetry is checked using precise measurements against anatomical landmarks. Model extents are entirely at your discretion, however a model of the single orbit (original anatomy) with an onlay reconstruction ‘jigsaw piece’ is the most cost effective route.  Time is saved by removing the laborious task of ‘waxing-up’ or hand-carving the defect in clay. From this stage, the traditional laboratory fabrication process continues as usual with flasking and pressing. TUMOUR REMOVAL / MIRRORING.

 

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 TUMOUR REMOVAL / MIRRORING 

Care is taken to remove the tumour from the CT data slice-by-slice.  Contralateral healthy anatomy is enhanced and mirrored.  The mirrored piece is positioned visually and blended into the surrounding area to achieve a smooth boundary.  Appropriate symmetry is checked using precise measurements against anatomical landmarks.  Time is saved by removing the laborious task of ‘waxing-up’ or hand-carving the defect in clay.  Downstream activities include uses as surgical references, planning aids and jigs for pre-bending plates

 

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EXTENSIVE MIDFACE RECONSTRUCTION

 

Contralateral healthy anatomy is enhanced and mirrored.  The mirrored piece is positioned visually and blended into the surrounding area to achieve a smooth boundary.  Appropriate symmetry is checked using precise measurements against anatomical landmarks.  The modified area is then isolated and undercuts removed to facilitate easy ‘assembly’.  Downstream activities include uses as surgical references, planning aids and jigs for pre-bending plates.