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implants - international magazine of oral implantology

42 I implants4_2012 havepassedthiscurriculumlastyearandgainedfurther qualification.ChristianMüller’sfirsttaskasamemberof theexecutiveboardwasthereforetoorganisethespe- cial podium “implant prosthetics”. As chairman of this podium, he maintained a leading function together withProfDrRammelsberg, Heidelberg,Germany. Prof Dr Rammelsberg also contributed a speech to theprostheticspodiumanddiscussedthecontroversial question,“Istheinclusionofthenaturaldentitioninim- plant-supported bridges or prostheses a risk or a gain withregardtothepreservationoftoothstructures”?His almost Solomon-like résumé with regard to the areas around bridges: “Both of the two alternatives work, in detachable and fixed prostheses”. Rammelsberg first compared solely implant-supported dentures to com- positebridges.Thetwokindsofbridgesshowhighsur- vivalrateswithregardtofixedprostheses.However,ce- ramic-only restorations displayed more complications than restorations made of metal and ceramics. Prof Dr Rammelsberg encounters frequently occurring chip- ping with non-ceramicly veneered ceramic-only restorations. Implant-supported detachable prosthe- sesshowedaslightlybutsignificantlyincreasedsuccess rate than those of combined anchorage. All in all, de- tachableprosthesesshowedonlylittlefailurerateswith regardtobothtypesofrestoration.Failuresweremostly technical, for example wear of the plastic. Prior to this, PDDrAndreasBindl, Switzerland,gaveanoverviewon the high number of varieties in implant planning via 3-D technology and digital impression taking. The “mount Olymp” of his elaborations was the virtual planningofprosthetics,“digitalbackwardplanning”at its best. The auditorium was highly interested in the possibilitytoproducedrilltemplatesinthedentalprac- ticevia3-Dplanning. Master dental technician Tom Lassen, Germany, contributedhisspeechonpassivefitasafundamental requirement for the long-term success in prosthetics. Hesaidthattheidealofthealmostpassivefithastobe pursued at any rate. However, mistakes in impression takingtechniquesandtheproductionofthemodelcan inhibit an ideal passive fit. Nevertheless, many dental technological processes have been clarified, fixation in the mouth, for example, has been a great relief. As Lassen stated, “Producing the model accurately is the cruxofthematter”. NewmemberoftheDGZIexecutive boardChristianMüllerofcoursealsotooktheopportu- nity to pick up the microphone and discuss casting vs. millingasfuturetechniquesforimplant-basedrestora- tions. Master dental technician Andreas Kunz, Berlin, Germany, raised the question of design and materials most suitable for implant abutments. Master dental technicianChristianMüllerandtheauthorputforward theirtroubleshootingupdate,takinguptheirpresenta- tionfromthepreviousannualcongressandaddingnew troubleshootingcasesinimplantology. _Special podium “Periimplantitis: Explantation or Therapy?” Eversincethefirstannualcongresses,theDGZIspe- cialpodiumshavebeenaninherentpartoftheirscien- tific programme and are turning more and more to be among the highlights of these educational events. HostedbyDGZIpresidentProfDrDrFrankPalm,ProfDr HerbertDeppe,ProfDrAndreaMombelliandProfDrAn- ton Sculean, the participants discussed the highly un- pleasant topic periimplantitis. As a quasi-introduction, federal periodontologist Prof Dr Mombelli held his speech on the epidemiology of periimplantitis. Mombelli realised that “exactly 25 years ago, periim- plantitis was born” when he spoke about the phenom- enonperiimplantitisforthefirsttimeinapublicationin Dr Tomohiro Ezak Prof Dr Amr Abdel Azim Dr Mazen Tamimi MohamedMoatazM.Khamis Prof Dr Suheil Boutros