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ePaper created 2018-01-31, 10:01:59 | version 1.38.0
| cone beam supplement Dynamic navigation in fully edentulous maxilla Prof. Dr Hakan Uysal & Dr Noyan Bas¸ al, Turkey Preoperative planning is the most important part of a successful implant rehabilitation and requires multi- ple parameters to be considered for the precise place- ment of implants. The implants should be placed not only within anatomical boundaries but also be strategically lo- cated to support a prosthesis that will fulfil both functional and aesthetic requirements. For years, stereolithographic static guides have been used successfully for implant osteotomies, using detailed information implemented through 3-D virtual images.1, 2 Static guides on the other hand present several disad- vantages. The loss of tactile feeling during osteotomy and the fact of being limited to the predesigned drilling trajec- tory are considered to be their major drawbacks. 3-D virtual images are being used through computer software, which transforms CBCT scans into 3-D virtual models. However, after a precise planning or virtual re- alisation of the treatment, the osteotomy should also be executed precisely according to the plan and would likely require guidance of the drills and the implant. Real-time navigation A recent technology, which provides dynamic guidance through a real-time navigation for implant osteotomy, of- fers not only accuracy, but also additional valuable ad- vantages during an operation.3, 4 With this technology, the Fig. 3 Fig. 1 Fig. 2 Fig. 4a Fig. 4b Fig. 1: Patient wants a screw- retained fixed prosthesis. Fig. 2: Radio-opaque tooth set-up for prosthetic planning. Fig. 3: Scan prosthesis at try-in to check its fit, aesthetics and maxilla mandibular relation. Figs. 4a & b: Navident H-Arm (a) and V-Arm (b). 40 CAD/CAM 1 2018