Marginal fit of machine-milled titanium and cast titanium single crowns.
Eighteen type IV dental stone dies were fabricated from a metal master die that replicated a tooth prepared to receive a metal ceramic crown. They were divided into three groups according to the type of crowns to be made: (a) machine-milled, spark-eroded titanium crowns (Procera); (b) cast titanium crowns; and (c) noble alloy crowns (as the control). The control specimens showed the smallest mean marginal openings at 25 microns and were significantly different from both the machine-milled crowns (54 microns) and the cast titanium crowns (60 microns). The two types of titanium crowns were not significantly different from each other.
Leong
D
D
Northwestern University Dental School, Chicago, Illinois.
Chai
J
J
Lautenschlager
E
E
Gilbert
J
J
D000704:Analysis of Variance; D003442:Crowns; D003735:Dental Casting Technique; D018772:Dental Marginal Adaptation; D003775:Dental Polishing / Q000295:instrumentation* / Q000379:methods; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D014025:Titanium
D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D014025:Titanium