Document Detail


Interfacial Nanoleakage and Bonding of Self-Adhesive Systems Cured with a Modified-Layering Technique to Dentin of Weakened Roots.
MedLine Citation:
PMID:  23550915     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
SUMMARY Objective: The purpose of the study was to evaluate the nanoleakage and bond strength of different self adhesive systems cured with a modified-layering technique (MLT) to dentin of weakened roots. Methods: Twenty-one maxillary incisors were decoronated and then root canals were instrumented and obturated with the cold lateral compaction technique. Weakened roots were simulated by flaring root canals until only 1 mm dentin thickness remained. Teeth were distributed into three groups. The canals were backfilled with Vertise Flow (VF group), a self-adhering system, following a modified-layering technique using two light-transmitting posts, sizes 6 and 3. DT Light Post size 2 was cemented using the same material. Remaining roots were prepared and cured in the same way as the VF group. However, in the TS/MF group, Clearfil Tri-S Bond (TS) adhesive and Clearfil Majesty Flow (MF) composite were used, while in the ED/PF group, ED primer II (ED)/Panavia F2.0 (PF) were used. After one week of storage, each root was sectioned to obtain six slices (two slices from each root third: coronal, middle and apical) of 0.9 ± 0.1 mm thickness. Interfacial nanoleakage expression was analyzed using a field emission scanning electron microscope (FEG-SEM), and the micro push-out bond strength (μPOBS) was measured at different root regions. Modes of failure were also determined using SEM. Data were statistically analyzed using two-way analysis of variance with repeated measures and Tukey post hoc test (p≤0.05). Results: With MLT, all adhesive systems showed nanoleakage. For μPOBS, there was a statistically significant effect for adhesive systems (p<0.001) but not for root region (p<0.64) or for their interaction (p=0.99). Tukey post hoc test revealed that the bond strength of the VF group was significantly higher than the TS/MF and ED/PF groups for all root regions. Conclusion: All of the tested self-adhesive systems cured using MLT had slight nanoleakage and were not sensitive to root regional differences. Self-adhering systems had higher bond strength than self-etch adhesives.
Authors:
E Mobarak; R Seyam
Related Documents :
12969365 - Radiographic bone density around immediately loaded oral implants.
24841845 - Biomechanical performance of an ovine model of intradural spinal cord stimulation.
19495815 - Peri-implant bone reactions around immediately loaded conical implants with different p...
19359865 - Immediate loading of modified acid etched dental implants in postextraction sockets: a ...
6828705 - A simple device for loading radioactive seeds into absorbable sutures.
2303385 - Intraocular silicone prostheses in a dog and a horse with corneal lacerations.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-3
Journal Detail:
Title:  Operative dentistry     Volume:  -     ISSN:  0361-7734     ISO Abbreviation:  Oper Dent     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7605679     Medline TA:  Oper Dent     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Longevity of Direct Restorations in Stress-Bearing Posterior Cavities: A Retrospective Study.
Next Document:  Comparison of 24-hour Intraocular Pressure Reduction Obtained with Brinzolamide/Timolol or Brimonidi...