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News Bulletin : ADA News Bulletin November 2011
25 NOVEMBER 2011 THE RESTORATIvE PROCESS Figures 1 and 2 show the onlay on the model prior to cementation. Figure 3 shows the under surface of the restoration. Figure 4 shows the model sectioned in the mid line to expose the space between the base of the restoration and the cavo surface. There is an ample distance within the preparation for sufficient bulk of the glass ionomer yet there remains knife-edge margins and close adaption to the model at the periphery. Fig 2. Onlay on the model prior to cementation. Fig 5. Tooth prior to cementation. Fig 3. Under surface of restoration. Fig 1. Onlay on the model prior to cementation. Fig 4. Model sectioned in the mid line. Figure 5 shows the tooth prior to cementation. Tooth contact analysis has been applied to the gingival tissues to prevent cervical seepage and enhance the definition of the cavo margins at the gingival floor. An auto cure glass ionomer cement (Ketac Fill, 3M ESPE: Fuji IX, GC Corp: Riva SC, SDI) was applied conservatively to both the internal surface of the onlay and the preparation. After seating the restoration, the patient was asked to bite firmly on a cotton roll until the cement had set, as the occlusal table of the restoration was slightly below the occlusion. “Current generation CAd/CAM machines have sophisticated programs that allow for spacing between the tooth and the base of the restoration.” aesthetic update
ADA News Bulletin October 2011
ADA News Bulletin December 2011