Abstract:
:The purpose of this study was to determine the bonding durability when a Megabond self-etching primer is used with 4-META/MMA-TBB resin to bond metal orthodontic brackets to human premolar enamel. Three conditions of enamel were prepared: Megabond self-etching primer without saliva contamination, Megabond self-etching primer with saliva contamination, and repeat Megabond self-etching priming after saliva contamination. Shear bond strengths were measured after immersion in water at 37 degrees C for 24 hours, or after 2000 or 5000 cycles of thermal cycling between 5 degrees C and 55 degrees C. There were no significant differences in shear bond strength among the three groups not only before thermal cycling, but also after thermal cycling. FE-SEM observation revealed the presence of saliva and reduced amount of resin tag formation after saliva contamination. The present study provided the evidence in human teeth that when using 4-META/MMA-TBB resin, Megabond self-etching primer treatment produced tight bonding even when surface was contaminated with saliva.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Sirirungrojying S,Hayakawa T,Saito K,Meguro D,Nemoto K,Kasai Kdoi
10.4012/dmj.23.251keywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
251-7issue
3eissn
0287-4547issn
1881-1361journal_volume
23pub_type
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