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

cone beam – international magazine of cone beam dentistry

case report _ computer-aided implant dentistry I Depending on the bone availability at the implant site, it is not always possible to place every implant in optimal positions for the prosthesis. Unfavourable implant axes make the fabrication of the prosthesis more difficult, which may significantly influence the functionalandaestheticoutcome.Theintroductionof computer-guided implant placement has fundamen- tally changed this. This technology enables resources to be optimised through precise planning beforehand and simulation of treatment progress. The ATLANTIS ISUS angulated screw access fits this concept well. Whiletheimplantpositionremainsthesame,spacecan beoptimisedjustbymovingthescrewchannels,giving wide-reachingconsequencesforthefinalresult. Use of the ATLANTIS ISUS angulated screw access can allow a screw-retained prosthesis to be selected in numerous cases where otherwise the aesthetical and functional outcome would not be ideal. When fabricating a titanium framework using CAD/CAM technology for a screw-retained prosthe- sis, the new ATLANTIS ISUS angulated screw access allows the screw access to be angled up to 30° to the implantaxis.ATLANTISISUSusesaspecifichexalobu- lar screwdriver and screws that are identical to the originalsexceptforthescrewheadinterface.Thisway you can transmit the screw force to the screw axis even when it is applied at an angle. Figure 1a illus- trateshowanimplantscrewinanangledchannelcan remainaccessiblewhenuseofastraightscrewchan- nel (Fig. 1b) would not be feasible. _Case report The 41-year-old patient had been edentulous in the maxilla since the age of 26 and wanted a fixed restoration with immediate restoration. There was nocontraindicationforanimplant-supportedpros- thetic restoration. Figures 2 and 3 show the initial clinical and radiographic situation. The treatment plan followed the computer- guided implant treatment criteria for fixed screw- retained bridges. After bite registration (Fig. 4), an aesthetic try-in was made in the laboratory, and this was tried in the patient’s mouth. The dual scan pros- thesis (Fig. 5) was made on this basis. Data from the subsequentCTscanwastransferredtotheSIMPLANT software (DENTSPLY Implants), which simulated the definitive prosthetic tooth positions (Fig. 6). Fig. 4_Bite registration in the patient’s mouth. Fig. 5_Incorporated radiographic template, i.e. the dual scan prosthesis. Fig. 6_Simulation of tooth set-up with the SIMPLANT software. Figs. 7 & 8_Radiographic diagnosis of bone volume and implant planning. I 19cone beam3_2015 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8

Pages Overview