Free excerpt - SAC Classification in Implant Dentistry

W. MARTIN, A. DAWSON, W. D. POLIDO

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Fig 3 a-e. (a-d) Scan bodies in situ for maxillary and mandibular arches. (e) Digital dental models.

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all-ceramic restorations (Zenostar, Wieland Dental). A virtu- al design was achieved with aminimal 2-mmmaterial thick- ness for the all-ceramic restorations, a minimumheight of 4 mm for the simulated individual abutment structures on the titanium framework, and the minimum height of 3 to 4 mm for all the remaining areas on titanium framework (Figure 5a). The maxillary milled bar was positioned on the CAD/ CAMdental cast and digitized with a dental laboratory scan- ner. The internal framework was designed and 3D-printed with direct metal printing (DMP) system (ProX DMP 200, 3D Systems) and Co-Cr metal alloy (LaserForm CoCr, 3D Sys- tems) (Figure 5b). The contouring and characterization of the definitive all-ceramic restorations were completed in

After the patient’s approval for the trial tooth arrangement, the CAD/CAM dental casts and trial tooth arrangement were digitized with a dental laboratory scanner. The satisfactory tooth arrangements were used to assess the restorative space of the maxillary milled bar and mandibular implant-­ supported fixed complete denture. There must be 1 mm of space between themilled bar’s intaglio surface and underly- ing soft tissue for adequate oral hygiene. Five-degree axial walls on both the lingual and facial sides of the milled bar were designed to provide proper resistance and stability of the overdenture. The tooth arrangement was also used to design the mandibular definitive CAD/CAM tissue-colored anodized titanium framework (AccuFrame IC, Cagenix) and

The SAC Classification in Implant Dentistry

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