Effects of oxalate on dentin bond after 3-month simulated pulpal pressure

Viracha Vachiramon; Marcos A Vargas; David H Pashley; Franklin R Tay; Saulo Geraldeli; Fang Qian; Steven R Armstrong

doi:10.1016/j.jdent.2007.11.011

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Effects of oxalate on dentin bond after 3-month simulated pulpal pressure

Journal article

Peer reviewed

Effects of oxalate on dentin bond after 3-month simulated pulpal pressure

Viracha Vachiramon, Marcos A Vargas, David H Pashley, Franklin R Tay, Saulo Geraldeli, Fang Qian and Steven R Armstrong

Journal of dentistry, Vol.36(3), pp.178-185

2008

DOI: 10.1016/j.jdent.2007.11.011

PMID: 18241968

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Abstract

Application of an acidic oxalate solution forms calcium oxalate within dentinal tubules and has been used to desensitize dentin and may also improve performance by reducing internal dentin wetness during bonding. The hypothesis tested was that oxalate restriction of dentinal fluid transudation when using an etch-and-rinse two-step adhesive will improve microtensile bond strength (μTBS) and reduce nanoleakage. Occlusal dentin of 60 human molars were bonded (Adper Single Bond Plus, 3M ESPE) while one-half of each tooth received either a liquid (SuperSeal, Phoenix Dental) or gel (BisBlock, Bisco) oxalate treatment after acid etching. The restored teeth were placed under pulpal pressure for 3 months before forming cylindrical dumbbell specimens for μTBS and failure pathway determination. Additional teeth were prepared and stored in a similar manner for transmission electron microscopy (TEM) examination of nanoleakage after tracer immersion. The mean bond strength in the group with oxalate liquid and the control group was 27.06 ± 7.14 and 36.18 ± 9.07 MPa, respectively, and for the gel form of oxalate was 25.34 ± 13.09 and 33.09 ± 14.25 MPa, respectively. The control groups were significantly stronger than either oxalate group using t-tests (liquid p < 0.00001; gel p = 0.0032) or Weibull (liquid p = 0.0002; gel p = 0.0029) statistics. Oxalate groups also demonstrated more adhesive failure modes and nanoleakage. Under the conditions of this study, the application of oxalate with an etch-and-rinse two-step bonding system produced significantly lower long-term μTBS and enhanced nanoleakage.

Etch-and-rinse two-step

Durability

Dentin bond strength

Dentin permeability

Oxalate desensitizer

Details

Title: Subtitle: Effects of oxalate on dentin bond after 3-month simulated pulpal pressure
Creators: Viracha Vachiramon - Department of Conservative Dentistry and Prosthodontics Faculty of Dentistry, Srinakharinwirot University Sukhumvit 23, Wattana District, Bangkok 10110, Thailand
Marcos A Vargas - The University of Iowa College of Dentistry, Iowa City, IA, USA
David H Pashley - School of Dentistry, Medical College of Georgia, Augusta, GA, USA
Franklin R Tay - School of Dentistry, Medical College of Georgia, Augusta, GA, USA
Saulo Geraldeli - The University of Iowa College of Dentistry, Iowa City, IA, USA
Fang Qian - The University of Iowa College of Dentistry, Iowa City, IA, USA
Steven R Armstrong - The University of Iowa College of Dentistry, Iowa City, IA, USA
Resource Type: Journal article
Publication Details: Journal of dentistry, Vol.36(3), pp.178-185
DOI: 10.1016/j.jdent.2007.11.011
PMID: 18241968
NLM abbreviation: J Dent
ISSN: 0300-5712
eISSN: 1879-176X
Publisher: Elsevier Ltd
Language: English
Date published: 2008
Academic Unit: Preventive and Community Dentistry; Operative Dentistry; Family Dentistry; Dental Research
Record Identifier: 9984065805602771

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