Surface geometry of three packable and one hybrid composite after polishing.
This study evaluated the surface quality of four composite materials after polishing with six different polishing techniques. Eighty specimens were made using three packable composites (Definite/Degussa, SureFil/ Dentsply and Solitaire/Heraeus-Kulzer) and one hybrid composite (Herculite XRV/Kerr). Five specimens of each material were polished using flexible Sof-Lex discs. The remaining 75 specimens of each composite were prepared using three finishing protocols: a single 30 microm diamond (n = 25), two finishing diamonds (30/20 microm; n = 25) and a 30 microm diamond followed by a tungsten carbide finishing bur (n = 25). Final polishing of each of the three finishing groups was accomplished with SuperBuff, Diafix-oral, OneGloss, Astropol and HaWe Composite Polishers (n = 5, each). Surface roughness was evaluated quantitatively by laser-stylus profilometry. Average roughness (R(a)) was calculated; statistical analysis of the data was performed with two-way ANOVA and Scheffé post-hoc tests. The polished surfaces were examined qualitatively by SEM. The results showed significant effects on surface roughness from the different composites (p = 0.011) and polishing systems (p < 0.001). After polishing, the Solitaire surfaces (R(a) = 0.72 microm) were smoother than Definite (R(a) = 0.87 microm) and SureFil (R(a) = 0.89 microm) and significantly smoother than Herculite (R(a) = 0.92 microm; p = 0.011). Three of the polishing methods (SuperBuff, Diafix-oral and Astropol) achieved lower R(a)-values than Sof-Lex discs. The polishing quality of the one-step systems SuperBuff and Diafix-oral was strongly affected by the initial finishing protocol.
Jung
Martin
M
Policlinic for Operative and Preventive Dentistry, Justus-Liebig-University, Giessen, Germany. martin.jung@dentist.med.uni-giessen.de
Bruegger
Hilka
H
Klimek
Joachim
J
D000537:Aluminum Oxide / Q000737:chemistry; D000704:Analysis of Variance; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D018130:Diamond / Q000737:chemistry; D004867:Equipment Design; D005290:Ferric Compounds / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties; D013729:Terpenes / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry; D017973:Tungsten Compounds / Q000737:chemistry; D014867:Water / Q000737:chemistry
D017554:Carbon Compounds, Inorganic; D003188:Composite Resins; C421785:Definite composite resin; D005290:Ferric Compounds; D019279:Resin Cements; D017655:Silicon Compounds; D012833:Siloxanes; C113049:Solitaire composite resin; C403464:SureFil packable composite; D013729:Terpenes; D017971:Tin Compounds; D017973:Tungsten Compounds; D014867:Water; C002802:tungsten carbide; C065770:Herculite XR; C000499:ferric oxide; D018130:Diamond; C045358:stannic oxide; D000537:Aluminum Oxide; C022088:silicon carbide