Proceeding of the International Digital Dentistry Society World Congress, Baden Baden 2019

Background: Biomodeling in integration with digital imaging techniques such as intra-oral scanning and cone-beam computerized tomography (CBCT) is being commonly practiced in dental implantology for pre-operative treatment planning, clinical teaching and evaluating bone density and drilling techniques.The objective of following study was to assess the quantitative accuracy of CBCTderived mandibular biomodels.Methods: A CBCT dataset was segmented and mandible was isolated.Fifteen mandibular biomodels were fabricated utilizing multijet (MJ=4), digital light processing (DLP=4), stereolithography (SLA=2), fused deposition modeling (FDM=2), colorjet (CJ=2) and selective laser sintering (LS=1) based high-end commercial and in-house printers.Printed models were superimposed onto the original mandible for comparing surface accuracy.A part comparison analysis with color-coded map was carried out for evaluating the difference between each printed and original model surface.Results: MJ technology showed least amount of error associated with both erupted and impacted teeth.Highest bony surface accuracy was achieved with SLA and LS based biomodels.Trabecular structures were most accurately printed with MJ printers.FDM technology had the highest overall absolute mean error associated with both teeth and bone.No significant differences were observed between each surface of original and printed models.Conclusions: Overall biomodels were able to well replicate skeletal and dental anatomical surfaces.However, some models showed shortcomings in relation to depicting trabecular architecture which might influence bone density for drilling bone and placing dental implants.P02

Abstract licence: CC BY-NC-ND

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