Studies on polishing of Ti and Ag-Pd-Cu-Au alloy with five dental abrasives.
Titanium (Ti) and Ag-Pd-Cu-Au alloy were examined for their polishing behaviour by conducting manually controlled polishing tests using five dental abrasives [carborundum point (CR) and silicone points (R1 and R2)] driven by a high torque micromotor with rotational speeds ranging from 2000 to 15 000 r.p.m. Polishing of Ti resulted in less volume of removal upon polishing, a rougher surface and larger loss of abrasives, compared with polishing of Ag-Pd-Cu-Au alloy. Polishing of Ti with a rotational speed of 15 000 r.p.m. led to the largest volume of removal upon polishing, whilst that of 10 000 r.p.m. produced the optimal volume for Ag-Pd-Cu-Au alloy. It was concluded that Ti was much more difficult to polish, requiring special care (e.g. frequent exchange of abrasives). Development of new abrasives for polishing Ti is required.
Hirata
T
T
Department of Fixed Prosthodontics, Osaka University, Osaka, Japan.
Nakamura
T
T
Takashima
F
F
Maruyama
T
T
Taira
M
M
Takahashi
J
J
D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008846:Micromanipulation / Q000295:instrumentation; D010165:Palladium / Q000737:chemistry*; D012399:Rotation; D012828:Silicones / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D019415:Torque
D017554:Carbon Compounds, Inorganic; D006047:Gold Alloys; D012828:Silicones; D012834:Silver; D010165:Palladium; D003300:Copper; D014025:Titanium