Hua Qiao, BS,a Rena Takahashi, DDS, PhD,a Toru Nikaido, DDS, PhD,a Syozi Nakashima, DDSc,a Alireza Sadr, DDS, PhD,b Masaomi Ikeda, RDT, BSc, PhD,c and Junji Tagami, DDS, PhDa
aDepartment of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan, bDepartment of Restorative Dentistry, University of Washington School of Dentistry, Seattle, WA, USA, and cOral Prosthetic Engineering, Graduate School of Tokyo Medical and Dental University (TMDU), Tokyo, Japan
Purpose: The objective of this study was to evaluate the dentin permeability with/without resin coating in different storage media and periods.Materials and Methods: Prepared bovine dentin disks were divided into three groups; 1) left uncoated as a control, 2) resin-coated with Clearfil SE Bond only, and 3) coated with the combination of SE and Clearfil Protect Liner F. The hydraulic conductance of each specimen was measured after storage in either deionized water or artificial saliva. The hydraulic conductance value was expressed as the percentage of baseline hydraulic conductance. Results: For the control group, the mean percentage of hydraulic conductance to baseline hydraulic conductance after 1, 30, and 90 days were 103.7%, 126.0%, and 128.6% in deionized water, and 92.5%, 64.4%, and 62.2% in artificial saliva, respectively. The mean percentage of hydraulic conductance to baseline hydraulic conductance of coated with the combination of SE and Clearfil Protect Liner F after 1 day in artificial saliva yielded the lowest (2.5%) among all the groups.Conclusion: Application of the resin coating to dentin surface demonstrated remarkable reduction of dentin permeability over time.
(Asian Pac J Dent 2015; 15: 33-40.)
Key Words: artificial saliva, dentin permeability, hydraulic conductance, resin coating, storage media