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Non‐cast titanium restorations in fixed prosthodontics
Author(s) -
BOENING K.W.,
WALTER M.H.,
REPPEL P.D.
Publication year - 1992
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1992.tb01103.x
Subject(s) - procera , materials science , ceramic , titanium , bending , dentistry , casting , dental porcelain , fixed prosthodontics , composite material , orthodontics , metallurgy , medicine , ecology , biology
Summary The problems encountered in casting titanium in dentistry have not been completely resolved. The Procera system forms crowns by means of a combination of spark‐erosion and milling. The accuracy of fit was examined before and after ceramic veneering both in vitro and in vivo . Before veneering, on conical surfaces space widths were approximately 53 μm in vitro and 69 μm in vivo . At shoulders and occlusal surfaces, spaces of about 430 μm were measured in vitro and of about 500 μm were measured in vivo . After ceramic veneering, slight increases in space widths could be observed. The metal‐ceramic compound was tested by the 3‐point bending test (DIN) and the bending test (ISO). The DIN test was satisfactory, but not the ISO test. It is concluded that titanium crowns processed by the Procera System are suitable for clinical usage, if the space widths at shoulders and the occlusal surface and the special requirements of tooth preparation are taken into account.