Blog
About

3
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Accelerated fatigue of dentin with exposure to lactic acid.

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Composite restorations accumulate more biofilm than other dental materials. This increases the likelihood for the hard tissues supporting a restoration (i.e. dentin and enamel) to be exposed to acidic conditions beyond that resulting from dietary variations. In this investigation the fatigue strength and fatigue crack growth resistance of human coronal dentin were characterized within a lactic acid solution (with pH = 5) and compared to that of controls evaluated in neutral conditions (pH = 7). A comparison of the fatigue life distributions showed that the lactic acid exposure resulted in a significant reduction in the fatigue strength (p ≤ 0.001), and nearly 30% reduction in the apparent endurance limit (from 44 MPa to 32 MPa). The reduction in pH also caused a significant decrease (p ≤ 0.05) in the threshold stress intensity range required for the initiation of cyclic crack growth, and significant increase in the incremental rate of crack extension. Exposure of tooth structure to lactic acid may cause demineralization, but it also increases the likelihood of restored tooth failures via fatigue, and after short time periods.

          Related collections

          Author and article information

          Journal
          Biomaterials
          Biomaterials
          Elsevier BV
          1878-5905
          0142-9612
          Nov 2013
          : 34
          : 34
          Affiliations
          [1 ] Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore, MD USA.
          [2 ] Adhesive Dentistry Research Group, Institute of Dentistry, University of Turku, Turku, Finland.
          [3 ] Department of Endodontics, Prosthodontics, and Operative Dentistry, Dental School, University of Maryland, Baltimore, MD 21201.
          NIHMS511722 S0142-9612(13)00918-6
          10.1016/j.biomaterials.2013.07.090
          3772674
          23948166

          Comments

          Comment on this article