[The effect of cavity finishing on the initial sealing capacity of amalgam fillings in vitro].
The effect of different cavity finishing methods on in-vitro microleakage of two amalgams (Amalcap non gamma 2 SAS, Tytin) was investigated by the dye penetration method. Amalcap non gamma 2 SAS demonstrated better sealing properties than Tytin. The highest degree of microleakage was observed when the cavities prepared with a diamond coated bur (mean particle size 80 microns) were left unfinished. The degree of marginal leakage in Class-I cavities was reduced by finishing their walls with tungsten carbide or diamond coated finishing burs. Cervical Class-II cavity walls finished with a tungsten carbide or a diamond coated finishing bur demonstrated lower marginal leakage than cervical walls finished with a gingival margin trimmer. Finishing of proximal Class-II cavity walls with tungsten carbide or diamond coated finishing burs followed by removal of the remaining enamel overhangs with a diamond coated file (Cavishape) resulted in a lower degree of dye penetration than finishing proximal walls with a proximal margin trimmer. The results indicate that Class-II cavities with minimal extension of the proximal walls can be effectively finished without using hand instruments.
Haller
B
B
Poliklinik für Zahnerhaltung und Parodontologie, Julius-Maximilians-Universität Würzburg.
Klaiber
B
B
Tens
K D
KD
D003723:Dental Amalgam / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000295:instrumentation / Q000379:methods*; D003754:Dental High-Speed Equipment; D006801:Humans; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D008963:Molar; D013499:Surface Properties
D003723:Dental Amalgam
Einfluss der Kavitätenfinierung auf das initiale Abdichtungsvermögen von Amalgamfüllungen in vitro.