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cosmetic dentistry_ beauty & science International Edition

I 21 special _ digital smile design I cosmeticdentistry 1_2015 incorporated into the photographs and images of the patient in ADSD. The dental shapes contained inthelibrarymustcorrespondtonatureitself,such as triangular, oval or rectangular with variables, like square or trapezoidal (Fig. 13f). _Libraries of dentition containing aligned and aes- thetically ideal complete mouths: There are some libraries,suchasthatofDigident,inwhichtheteeth arealreadypreformedaccordingtothemorphology of the incisal edges (flat, square and round). _Personalcasereportsdatabase,thatisthecollection of our clinical cases concerning the fabrication of prostheses, aesthetic dentistry, virtual wax-ups, mock-ups and the healthy dentition of patients (with their permission). Dental technicians in lab- oratories could also exchange data thanks to the goodwill of colleagues who supply them with im- ages. An ADSD images community would be of great scientific advantage. This library should con- sist of images of complete and partial dental arches (eightanteriorteeth,sixanteriorteeth).Thesemight be single maxillary arches, the primary object of smile design, or maxillary and mandibular arches withnormalocclusion(usefulforpartiallyortotally edentulouspatients).Theimagesmightalsocontain thegingivaaccordingtophotographicrequirements; indeed, they may be integrated as a whole into the virtual oral cavity or else one might isolate single teeth (Fig. 12) in order to be able to adapt them accordingtoshape,alignment,emergence,idealcon- tour and contact points respecting the aesthetics. _Dental libraries of removable prostheses: These are availableontheWebfromleadingcompaniesinthe industry, such as Ivoclar Vivadent, Heraeus Kulzer and Candulor. _Smile library, consisting of photographs with faces of models smiling, which can be useful if in high resolution. The teeth can be selected and extra- polated from the face of the subject, generally photographedbyprofessionalphotographers.These imagescanbedownloadedfromstockphotography sites at a fee (such as 123RF.com, Fotolia.com, Shutterstock.com and Fotosearch.com). Another very important feature of this method of smile design is Digital Dental Image Distortion (DDID; Figs. 13a–f), which allows the modification of the morphol- ogy of the teeth to be processed. This function is of great utility for the formation of the teeth in the DDPD. It must be applied to length and width (Figs. 14a–c), as well as in every direction both along the contours and on the dental sur- faces, and especially along the lines of transition. This processing is of- tenveryusefulforlightreflectedon the dental surfaces characterised by micro- and macro-textures, and is effective in the analysis and pro- cessing of the interproximal con- tact points and inter-incisal angles. Moreover, it is effective in the morphological classification of the incisaledges,transitionallines,etc., often reference points specific to the age, sex and personality of the patient (morphopsychology). From my point of view, this part of dental digital image editing is the most importantbecauseitisnotpossible to give a prefabricated smile to a patient; while such a smile might be made up of teeth that are in themselvesperfect,itisnecessaryto know how to modify, model, shape, deform,increase,diminishorelimi- nateeverythingincontrastwiththe harmony of form (Figs. 15a–e). Figs. 16a & b_DDCT. Fig. 16b Fig. 16a CDE0115_14-22_Bini 26.02.15 10:29 Seite 8 CDE0115_14-22_Bini 26.02.1510:29 Seite 8

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