Akademik Veri Yönetim Sistemi
78th General Session of the IADR, , Washington, Amerika Birleşik Devletleri, 5 - 08 Nisan 2000, cilt.79, sa.2431, ss.447, (Özet Bildiri)
In this study, the effect of different mi~ing techniques on the dimensional subility and detail reproduction ofsilicon based impression materiids was investig:&tcd. 11 polyvinyl silo.une materials at diITerent visco!Uly wereused.lmpreiUion materials were coded as follows: Express 7301 H "A", E:\press 7302 H "B". Rcprosil·light "C",Rcprosil.heavy "0", President Jet "E", Provil LCD OF", Provil MCD MO", Panasil contact "H", Kerr extrUde-light"K", Kerr c:\trude-cnedium "L", Kerr extrUde.heavy MM". Dimensional stability and detail reproduction tests werecarried out in accordance wich ADA specification No. 19. The specimens collected from each material beth wilhimpression syringe and spatule mixing were measured for linear dimensional $Ubi~it~ 10 minutes, I hour: and 24houn aftcr mixina: and their percentages calculated. The results wese sUttStlcal1y evaluated With bochKruskal-WaUis Ind Multiple Comparison IDethods. The difference in 10 minutes between impression malerialsmixed with impression £yringe wu not stalistically significant whereas the dilTcrence in the same time periodbetween those miilted with spatula was statislically significant (p < 0.05). As to Ihe measurements made after 1hour and 24 hours for both mixing IeChniques there were statistically significant diffttcnces between many if nOIall, materials (p < O.oS). In all measuremeltl- periods, no signifteant difference was found betweeen mixing techniques for all impression materials. The: difference between the results in 10 minutes, I hour and 24 hoursafter mixing was not statistically significant for both mixing techniques and all impression materials. The tests f~rdetail reproduction ....ere evaluated with a scoring system in aCCQl'dancc with ADA specification No. 19 and thetrresults were found CO be congruent with those of dimensional sUbilit)· tesu. [n conclusion it was foond chat therewas no statistically significant dirrcrence between the effect1i of syringe and spatule mixing techniques on the dimensional stability and detail reproduclion of silicon based impression m:llcrbls. In addition no difference was observed in the dimemional stability of all impression materials at different perjods.