C Maucoski, Jag Guarneri, P Runnacles, D C Zarpellon, U Coelho, F A Rueggeberg, Cag Arrais
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引用次数: 0
Abstract
Objective: This study evaluated the effect of delay of the etch-and-rinse bonding procedure on in vivo real-time intrapulpal temperature during restoration of Class V preparations on human premolars.
Methods and materials: Intact premolars planned for orthodontic extraction from 11 volunteers received infiltrative anesthesia and were isolated using a dental dam. An occlusal preparation was performed using a high-speed diamond bur with air-water spray until obtaining minimal pulp exposure, followed by insertion of a sterile thermocouple probe. A buccal Class V preparation was made using a high-speed diamond bur cooled using air-water spray. To simulate the time spent on caries removal, material placement was delayed 15 minutes until physiologic pulpal temperature (PT) was reestablished (approximately 35°C). Preparations were acid etched and rinsed. A two-step etch-and-rinse bonding agent, Single Bond Universal (Solventum, St. Paul, MN, USA) or Tetric Nano Bond (Ivoclar Vivadent, Schaan, Lichtenstein), was applied and photocured following manufacturers' instructions. The teeth were restored using conventional (Filtek Z250 or Filtek Z350, Solventum) or bulk-fill (Tetric N Ceram Bulk-fill, Ivoclar Vivadent) resin composites, which were photocured with a dual-peak LED light-curing unit (Bluephase 20i, Ivoclar Vivadent). Peak PT and ΔT values were analyzed using two-way repeated measures ANOVA and Bonferroni post hoc tests.
Results: Etch-and-rinse and solvent evaporation procedures reduced PT, despite restoration starting at physiologic PT. Only the 40-second exposure of Filtek Z350 resulted in significantly higher peak PT values compared to baseline (38.2°C ± 2.4°C). ΔT values for Z250 were not significantly different from those for Tetric N-Ceram Bulk-fill.
Conclusion: Even when etch-and-rinse bonding procedures started at physiologic PT, PT decreased, preventing harmful levels of temperature rise in the pulp.
期刊介绍：
Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. In 2012, we printed 84 articles (672 pages). Papers were submitted by authors from 45 countries, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts.
One of the strong points of our journal is that our current publication time for accepted manuscripts is 4 to 6 months from the date of submission. Clinical Techniques/Case Presentations have a very quick turnaround time, which allows for very rapid publication of clinical based concepts. We also provide color for those papers that would benefit from its use.
The journal does not accept any advertising but you will find postings for faculty positions. Additionally, the journal also does not rent, sell or otherwise allow its subscriber list to be used by any other entity
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