Microleakage of composite and two types of glass ionomer restorations with saliva contamination at different steps.
OBJECTIVE
This study's purpose was to evaluate microleakage of two types of glass ionomer (GI) and composite restorations with saliva contamination at different stages of restorative procedures.


METHODS
Extracted teeth with Class V cavities were restored with a conventional GI, nanofilled RMGI, or total-etched composite. The preparations were contaminated with saliva before the adhesive/primer application or before the restoration placement (N=10). The restored teeth were thermocycled (1000X), stained (basic fuchsin), and sectioned. Microleakage distance was measured and subjected to analysis of variance and Duncan's post-hoc test (P=.05).


RESULTS
For the enamel margin, no significant difference was found between the conventional GI and composite restoration, with or without saliva contamination (P>.05). The nanofilled RMGI with contamination before restoration had the highest microleakage. For the cementum margin, composite had significantly more microleakage than both types of GI restorations, regardless of saliva contamination.


CONCLUSIONS
Conventional and resin-modified glass ionomer restorations had less cementum microleakage, while the composite had less enamel microleakage. Saliva contamination did not affect microleakage of the conventional GI at either enamel or cementum margins. The nanofilled RMGI system was not sensitive to saliva contamination at the gingival margin, but had increased microleakage at the enamel margin, especially after the primer application.
Pediatric dentist in Bryant, Ark., USA; College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA.
Sarah N
SN
Farmer
Private practice, Dallas, Texas, USA; College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA.
Scott W
SW
Ludlow
Associate professor and director, Postgraduate Pediatric Dentistry, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA.
Martin E
ME
Donaldson
Associate professor, Department of Restorative Dentistry, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA.
Daranee
D
Tantbirojn
Professor and director of biomaterials research, Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA. antheun@uthsc.edu.
Antheunis
A
Versluis
D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods; D003737:Dental Cavity Preparation / Q000145:classification; D003739:Dental Cementum / Q000473:pathology; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000145:classification*; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods*; D004340:Drug Contamination; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012394:Rosaniline Dyes; D012463:Saliva / Q000502:physiology*; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
D000180:Acrylic Resins; D004396:Coloring Agents; D003188:Composite Resins; D003764:Dental Materials; C000590992:Filtek Supreme Ultra; C439808:Fuji IX GP Fast; D005899:Glass Ionomer Cements; C451600:OptiBond Solo Plus; D019279:Resin Cements; D012394:Rosaniline Dyes; C006903:carbopol 940; C025485:basic fuchsin