Please activate JavaScript!
Please install Adobe Flash Player, click here for download

CAD/CAM - international magazine of digital dentistry

I special _ guided implantology 06 I CAD/CAM 1_2012 Fig. 1a_Components of the bottle-neck device. Fig. 1b_Embedded sleeve. Fig. 1c_Ostetomic sleeve. Fig. 1d_Modified extender to fit the osteotomy sleeve—any hand-free surgical kit will work. Fig. 1e_Bottle-neck. Figs. 1f–h_Bottle-neck created. Fig. 1i_Assembly while being screwed. _Accuracy in guided implantology is an issue. The ability to perform implant placement both safely and correctly, in order to load a pre-surgical CAD/CAM bar or cementable metal final framework prosthesis and to digitise the entire procedure, is widelyresearched.Accuracyisavaluealsoinaclas- sical II-stage protocol and respecting hard and soft tissues for long-term implant site stability. There is an ongoing debate amongst clini- cians regarding which is the best available system. Vercruyssen summarises this debate.1 The article reviews only some of the published articles on this topic. All of these articles emphasise the error mar- ginsandthattheycanbeconsideredclinicallymore or less acceptable, and determine accuracy in im- plant placement by means of superimposition. In mathematical terms, “precision” means the repeatability of a measurement, and “accuracy” re- fers to the correspondence of this measurement to thetruth.Inourfield,accuracyhasbeenconsidered the correspondence of the placed implant to the planning. Fortin defines “accuracy” as an ideal, at present somewhat impractical, when considering a defin- itive prosthesis for immediate loading, with the present systems only offering predictable results (andassuchonlylong-termreinforcedprovisionals willbeavailable),butdoesnotquantifyathreshold.2 According to Di Giacomo, at present a post-opera- tive impression appears to be always necessary for immediate loading with a definitive prosthesis.3 Guided implantology is far better than a free-hand New concepts in computer-guided implantology Part I: Thread timing and implant phase Author_Dr Gian Luigi Telara, Italy Fig. 1a Fig. 1b Fig. 1c Fig. 1d Fig. 1e Fig. 1f Fig. 1g Fig. 1h Fig. 1i