cosmetic dentistry_ beauty & science International Edition

case report _ ceramic veneers I thickness range from 0.2 to 1 mm. Different wall thicknesses on the same veneer are not recom- mended with the foundation ceramic veneer technique. The fabrication process begins with impres- siontakingofthetoothstumps(Fig.14)insilicone and obtaining duplicates of these stumps in plaster in a refractory mass (Figs. 15 & 16). It is important that the position of the plaster stumps in the model coincide perfectly with the position of the stumps in the refractory mass (Figs. 17 & 18).Inordertoachievethis,oneshoulduseanap- propriate polymerisation vessel and removable pins (Fig. 18). Stumps produced in the refractory mass should be baked in a furnace according to themanufacturer’sinstructions(Fig.19).Thenext step is drawing preparation lines with a pencil designed for withstanding high temperatures (Fig. 20). Then the technician applies glaze to the stumps, creating a glossy surface owing to the ceramic microfilm, to protect them from possible damage. The prepared stumps are then ready for coating with an appropriate ceramic in layers, forming the desired veneer shape (Figs. 21–23). The most complicated tasks are removing the refractorymassfromthethinlayerofceramicand checking the marginal fit on the working model (Figs. 24 & 25). The process requires skill and attention from the dental technician. Structures of 0.2 mm in thickness are very brittle and even the slightest bending can break the veneer. The mass is removed by sandblasting at 0.1 MPa with 50 µm sand. The prepared veneers are then ready to be placed in the patient’s mouth. Careful work will be confirmed by marginal fit and colour compatibility. After receiving the restorations from the lab- oratory, checking of the passivity of fit of the veneers on the stumps was performed. Cemen- tation, adjustment and final polishing were carried out in the same way as in the first case. After cementation, the restorations were per- fectly integrated with the gingival zone, and mimicked the characteristics and structure of the patient’snaturalteeth.Theoutcomeofprosthetic treatment was satisfactory to both the dentist and the patient, both immediately and in the long term (Figs. 26a–d). _Conclusion In both of the cases presented, the patients cametothedentalclinictoimprovetheaesthetics oftheirsmileswithminimallyinvasivetreatment. Owing to proper assessment of the conditions and to the selection of suitable material, the objective could be achieved for both patients. The patients received restorations perfectly har- monised with their own teeth and facial features. In addition, the application of the proper criteria forassessmentofthecasesandforindicationsfor rehabilitation with feldspathic ceramic veneers ensured the functionality and durability of the restorations, which have been confirmed by several years of observation._ I 25cosmeticdentistry 1_2014 Dr Magdalena Jaszczak-Małkowska, DMD,graduated from the Medical University ofWarsaw in 1996.Until 1998,she was a collaborator with the Institute of Genetics andAnimal Breeding of the Polish Academy of Sciences.In 2008,she obtained a certificate in Prosthodontics.She has worked in a private practice specialising in aesthetic and prosthodontic dentistry since 2000.She may be contacted at m.jaszczak@estedentica.pl. ESTEDENTICA ul.Dobra 27/A 00-344Warszawa,Poland Robert Michalik graduated from the Faculty for Dental Technicians inWarsaw Medical School in Poland in 1987. After two years of work in the university’s dental laboratory, he opened his own dental laboratory,Inter-Dent,which he is still running.In 2003,he was the first in Poland to start working with dental CAD/CAM systems.In 2007,he began development of the first Polish CAD/CAM system in collaboration with Delcam and 3Shape.Also in 2007,he submitted an application to patent a method of creating telescopic crowns with intermediate crowns. He is the author of several articles for the trade press and may be contacted at info@inter-dent.pl. Laboratorium Inter-Dent ul.Pustułeczki 23 02-811Warszawa,Poland www.inter-dent.pl cosmeticdentistry _about the authors CDE0114_18-25_Michalik 11.06.14 14:05 Seite 8