Chairside - Glidewell Dental Labs

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Figure 10: A provisional restoration is fabricated from a preoperative impression taken prior to preparation of the fractured unit. Flowable composite resin was used to fill in the fracture prior to taking the impression, so that the provisional restoration would have the correct contours. Figure 11: The fabricated saddle crown on the master laboratory model, shown from the facial aspect The saddle crown consists of a facial and lingual surface only. These surfaces are only joined proximally incisal to the solder joint of the existing bridge. Figure 12: Incisal view of the preparation as seen on the master laboratory model A provisional restoration is then fabricated using a bisacrylic provisional material (Luxatemp ® [DMG America]) and is cemented with polycarboxylate cement (Fig. 10). Digital photographs are provided to the ceramist to aid in characterization. Figure 11 is a facial view of the saddle crown on the laboratory cast model. An incisal view of the master cast shows the preparation design that basically strips the porcelain down to the metal substructure on the facial and lingual, and is “tied in” with a continuous mesial and distal proximal finish line on the metal connectors of the preexisting bridge (Fig. 12). A proximal view of the completed restoration highlights the “saddle” design (Fig. 13). Interproximal margins are in metal and are located incisal to the metal connectors of the understructure. The lingual surface of the restoration is made in metal to match the preexisting bridge and limit the amount of lingual reduction (Fig. 14). The completed saddle crown is tried in after removal of the provisional restoration (Fig. 15). After verification of fit and checking occlusion with articulating paper, the restoration is ready for cementation. In this case, resin-modified glass ionomer cement was used (Fig. 16). A 4-META-type cement is also good to cement metal to metal if retention is less than ideal. The cement is mixed according to the manufacturer’s instructions (Fig. 17) and pushed into place on the preparation (Fig. 18). It is recommended to hold the 30 www.chairsidemagazine.com
Figure 13: The saddle crown shown from the proximal view Figure 14: The saddle crown on the master laboratory model from the lingual aspect Figure 15: After removal of the provisional restoration, the saddle crown is tried in and the fit is evaluated. Figure 16: A resin ionomer cement (RelyX Luting Cement [3M ESPE; St. Paul, Minn.]) is dispensed prior to mixing. Figure 17: The mixed cement is placed into the saddle crown. Figure 18: The saddle crown is held in place while the cement is allowed to set. Repair, Don’t Replace – Part 231
Page 1: Chairside® A Publication of Glidew
Page 4 and 5: Contents 35 Faster Is Not Always Be
Page 6 and 7: Letters to the Editor Dear Dr. DiTo
Page 8 and 9: Contributors Michael C. DiTolla, DD
Page 10 and 11: Numbers by the 52% Percentage of de
Page 12 and 13: Dr. DiTolla’s CLINICAL TIPS PRODU
Page 14: Dr. DiTolla’s CLINICAL TIPS PRODU
Page 17 and 18: 1 2 3 4 5 Figures 1-5: Patient, wit
Page 19: 12 Figure 12: Veneers returned from
Page 22 and 23: Figure 1: A smile in need of a rema
Page 24 and 25: Figure 9: Bonding resin is applied
Page 26: Figure 18: Cross section through a
Page 30 and 31: Figure 1: A preoperative view of to
Page 34: Figure 19: A lingual view of the ce
Page 38 and 39: quality of the impression.” Howev
Page 40 and 41: Figure 7: Gaps and ledges with lack
Page 44 and 45: 42 www.chairsidemagazine.com
Page 46 and 47: Dr. Michael DiTolla: The thing I lo
Page 48 and 49: you go over and the caller ID says
Page 50 and 51: low. If I’m about to prep away th
Page 52 and 53: that is we have to give the technic
Page 54 and 55: is one little spot where there’s
Page 56 and 57: worrying that self-etchers don’t
Page 59 and 60: - ARTICLE and CLINICAL PHOTOS by Ca
Page 61 and 62: Patient Positioning You can take th
Page 64 and 65: BIOLOGIC SHAPING An Alternative to
Page 66 and 67: Figure 5: Smoothing the tooth’s s
Page 68 and 69: Doc moved to Dallas, Texas, and qui
Page 70: The Chairside® PHOT Hunt This phot

Chairside - Glidewell Dental Labs

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