Optical evaluation of enamel white spot lesions around orthodontic brackets using swept-source optical coherence tomography (SS-OCT): An in vitro study

Dent Mater J. 2019 Feb 8;38(1):22-27. doi: 10.4012/dmj.2017-262. Epub 2018 Aug 29.

Abstract

The aim of this study was to evaluate in vitro detection of enamel white spot lesions around orthodontic brackets using swept-source optical coherence tomography (SS-OCT). Twenty-four clear orthodontic brackets were bonded onto the enamel surface of bovine incisor specimens using three types of orthodontic resin adhesives: non-fluoridated, fluoridated, and fluoridated light cured. The specimens were subjected to artificial demineralization. SS-OCT images were captured before demineralization and at 24 h and 1 week after demineralization. Lesion depth (LD) was measured and analyzed using Image J software. Results revealed significant increases in LD with time in all three groups. LDs were, however, significantly smaller in the fluoridated adhesive groups than in the non-fluoridated group. In addition, SS-OCT was validated for the detection of micro-leakage and white spot lesions beneath and around the orthodontic brackets.

Keywords: Enamel demineralization; Optical coherence tomography; Orthodontic adhesives; Orthodontic brackets; White spot lesion.

MeSH terms

  • Animals
  • Cattle
  • Dental Cements / chemistry
  • Fluorides / chemistry
  • Image Processing, Computer-Assisted
  • In Vitro Techniques
  • Incisor
  • Orthodontic Brackets / adverse effects*
  • Software
  • Tomography, Optical Coherence*
  • Tooth Demineralization / diagnostic imaging*
  • Tooth Demineralization / etiology*

Substances

  • Dental Cements
  • Fluorides