J4 ›› 2011, Vol. 37 ›› Issue (1): 142-146.

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Contrast study of |microleakage incidence and extent of |collocation uses of several clinical and frequently used cements and dowel materials

 ZHU Zhen1,2, LIU Zhi-Hui1, WANG Li-Quan3, GONG Chun-Yan4   

  1. 1.Department of Prosthodontics,Stomatology School,Jilin University,Changchun 130021,China;2.Department of Prosthodontics,Zhenjiang Oral Hospital,Zhenjiang 212002,China|3. Department of Stomatology,Clinics Service,Air Force Aviation University,Changchun 130022,China;4. Department of Stomatology,Perple’s Hospital, Jilin Province,Changchun 130021,China
  • Received:2010-06-07 Online:2011-01-28 Published:2011-01-28

Abstract:

Abstract:Objective To evaluate the microleakage degree of  complete cast-metal crowns cemented onto teeth that were rebuilt with different core materials and   provide some evidences for clinical application. Methods Ninety extracted molar teeth were randomly divided into nine groups as follows: amalgam / super bond C&B,amalgam/ zinc polycarboxylate,amalgam/ glass-ionomer CX,gold/ super bond C&B,gold/ zinc polycarboxylate,gold/ glass-ionomer CX,composite/ super bond C&B, composite/ zinc polycarboxylate,composite/ glass-ionomer CX. Tooth preparations for complete veneer cast crowns were completed. A classⅡcavity preparation with fixed dimension was made in each tooth. Three different core materials(composite resin,amalgam,cast-gold) were filled in them. The artificial crowns were cast and cemented onto teeth by using three different cements(composite resin super bond C&B,glass ionomer CX,zinc polycarboxylate).The specimens were thermocycled and dyed. They were then embedded in epoxy resin and sectioned. The degree of microleakage was evaluated and scored.  Results In super bond C&B group,the three different cores showed no significant difference in core base microleakage. In zinc polycarboxylate group and glass-ionomer CX group,the core base microleakage in amalgam and composite were significantly different from those in gold(P<0.05). The crown microleakage degree of composite resin was lower than those of glass ionomer and zinc polycarboxylate (P<0.05).Conclusion The  microleakage degree of composite resin is less than those of glass ionomer and zinc polycarboxylate,and the microleakage of amalgam and composite resin is also lower than that of cast-gold core materials.

Key words: cement ; dowel ; microleakage

CLC Number: 

  • R783.3