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ePaper created 2015-03-04, 10:43:31 | version 1.33.01
I industry report 28 I implants1_2015 formetalframeworksarekeytothequalityofthefinal restoration(Fig.13i).TheCTscandataisconvertedinto aformatthatallowsthe3-Dimagestobeutilisedbythe selected treatment planning software. The case is then plannedinthesoftware.CADsoftwareshavedatabases that allow creating virtual models of the desired restorationusingdifferentmaterials:zirconia,titanium, CoCr,E-max,PMMAetc.Ifthedentallaboratoryhasits own scanner, an STL file is sent directly to the produc- tioncentrebyemail.Otherwise,boththemodelandthe wax-upareforwardedtotheproductioncentreviaUPS. If computer settings are correct, you are ensured of a perfect reproducibility of the manufacturing process andconsistencyoftheresult(i.e.atrulypassiveframe- work fit). Optimal setting of the coping thickness pa- rameter or the pontic connection parameter may pre- vent torsion or deformation of the framework during firing(baking)oftheceramic. Substractive manufacturing combined with digital modellingeliminatestheriskofalterationofthemate- rial structure. The resulting metal framework will have optimal homogeneity and density. As regards fabrica- tionofimplantsuprastructures,machiningisdefinitely the technique of choice to achieve high precision and nearpassivefit.Practitionerscanexpectconsistentand reproducibleresults,excellentframeworkfit,andregu- lar,accurateprostheticseals. _Conclusion Today,dentallaboratoriesareusinghigh-techscan- ning equipment, which allows digitisation of the mas- termodel(todeterminetheimplantindex)andthewax- up. CAD/CAM offers a level of quality and accuracy yet unsurpassed by any of the traditional techniques. Pas- sive fit which is critical to the outcome of an implant- supportedprosthesisisadeterminantofthelong-term successofarestoration.Passivefitoftheframeworkfor a long-span restoration is much easier to achieve and reproduce with CAD/CAM than with the traditional pouringtechniques. The use of CAD/CAM machining for implant-sup- ported restorations guarantees a highly accurate and predictable framework fit (<10 microns). In addition, machining centres can produce fully biocompatible materialssuchastitaniumandzirconia.Totakeadvan- tage of the accuracy of CAD/CAM, it’s required to use safeandreliableimplantsystemswithsuperiorbiolog- icalandbiomechanicalcharacteristics. CAD/CAM will soon be a must-have. Current CAD/CAM solutions are easily accessible to any dentist whilenotchangingfundamentallytheirworkhabits._ Thanks to G. Nauzes and J. Bellany, Laboratory Techni- cians(Socalab®laboratory). Fig. 13g_Patient’s new smile. Fig. 13h_Postoperative panoramic X-ray with bridge in place. Fig. 13i_Overview of Simeda® process stages. contact Dr Dr Richard Marcelat Post-graduate Certificate in Implantology,CURAIO, Lyon Academic Degree in Oral Implantology,Corte Academic Degree in Basal Implantology,Nice 11 cours des Platanes 26130 Saint Paul trois châteaux,France Tel:+33 475960011 richard.marcelat@orange.fr Fig. 13e Fig. 13f Fig. 13g Fig. 13h Fig. 13i Tel:+33475960011