Comput. Biol. Med. - Similarity measure for quality control of dental CAD/CAM-applications.

Tópicos

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Resumo

There is no measure for morphometric quality control of dental CAD/CAM-restorations as well as for evaluation of newly developed CAD/CAM-applications. The aim of this study was to (a) establish a 3D-measure for morphological comparisons, (b) to proof its metrical and subjective-visual validity and (c) to explore morphological features which have relevant impact on visual perception. 125 maxillary anterior teeth were chosen from a digital library of 3D data sets and compared by automatic superimposition with a best-fit method. The superimposition was analyzed by a newly defined 3-dimensional similarity measure, called shape similarity value (SSV). With this measure, similarity between symmetrical and non-symmetrical teeth was evaluated and the metrical validity was tested. Additionally, visual evaluation of tooth similarities were performed and analyzed by means of multivariate statistical procedures, to test the correspondence between metrical similarity measure and visual similarity perception. The measure clearly reproduced the similarity of contralateral teeth and the dissimilarity of teeth between different individuals. The coincidence between quantitative similarity measure and visual perception was moderate. In conclusion, the presented 3D-measure can be considered as a first substantial step towards a morphometric quality control of CAD/CAM-restorations of anterior teeth.

Resumo Limpo

measur morphometr qualiti control dental cadcamrestor well evalu newli develop cadcamappl aim studi establish dmeasur morpholog comparison b proof metric subjectivevisu valid c explor morpholog featur relev impact visual percept maxillari anterior teeth chosen digit librari d data set compar automat superimposit bestfit method superimposit analyz newli defin dimension similar measur call shape similar valu ssv measur similar symmetr nonsymmetr teeth evalu metric valid test addit visual evalu tooth similar perform analyz mean multivari statist procedur test correspond metric similar measur visual similar percept measur clear reproduc similar contralater teeth dissimilar teeth differ individu coincid quantit similar measur visual percept moder conclus present dmeasur can consid first substanti step toward morphometr qualiti control cadcamrestor anterior teeth

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