[Layer thickness of dental adhesives. Relation between layer thickness and viscosity].
OBJECTIVE
To investigate the viscosity of two dental adhesives in relation to the adhesive layer thickness.


METHODS
In vitro study.


METHODS
The viscosity of several dental adhesives has been determined with a reogoneometer. Both a high and a low viscous adhesive was used to restore class II preparations. These restorations were sectioned and the thickness of the adhesive layer was measured on several defined locations. A statistical analysis was performed.


RESULTS
The high viscous adhesive resulted in a thinner layer along the cervical outline of the restoration. With both materials pooling occurred at the line angles of the preparation. On the flat surfaces of the preparations there was a layer of even thickness.


CONCLUSIONS
The differences in thickness of the adhesive layer as often seen on radiographs cannot be explained solely by the use of adhesives with a different viscosity.
Kuijs
R H
RH
Sector Preventieve en Curatieve Tandheelkunde, Katholieke Universiteit Nijmegen, postbus 9101, 6500 HB Nijmegen.
Burgersdijk
R C
RC
Roeters
F J
FJ
D003738:Dental Cements / Q000032:analysis* / Q000737:chemistry; D003764:Dental Materials / Q000032:analysis; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D019279:Resin Cements / Q000032:analysis* / Q000737:chemistry; D013499:Surface Properties; D014783:Viscosity
D003738:Dental Cements; D003764:Dental Materials; D019279:Resin Cements; C095998:Adhesive cement
Laagdikte van hechtlakken. Relatie laagdikte en viscositeit.