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ePaper created 2016-01-07, 12:59:38 | version 1.38.0
I case report 30 I implants4_2015 Titanium—four times lighter than semi-precious alloys—is the lightest metal used in dentistry. It of- fers excellent biocompatibility and very good me- chanical properties.6 The metal is highly reactive to oxygen: when the metal is exposed to air, a protec- tive film, the passivation layer, builds up on its sur- face and makes it extremely resistant to corrosion andchemicalattacks.Titaniumoffersadditionalad- vantages in oral implantology. The density of the materials used is crucial. The weight of a prosthesis foranupperjawappearstobeakeyfactorfortreat- ment success. A few days later, the bar was tried in the patient’s mouth.Itwasperfectlyadjustedandseatedpassively (Figs. 11a–d). Milled bars exhibit a precision fit better than 10µ. The substructure was sent back to the lab- oratory technician, who then produced the frame- workusingthesiliconeindicesoftheapprovedfunc- tional and aesthetic set-up. Figs. 9a & b_3-D CAD model. Fig. 10_Milling. Figs. 11a & b_Simeda milled titanium bar. Fig. 11c_The titanium bar in situ. Fig. 11d_Panoramic radiography for fit control of the bar. Fig. 9a Fig. 9b Fig. 11a Fig. 11b Fig. 11c Fig. 11d Fig. 10