Assessing near infrared optical properties of ceramic orthodontic brackets using cross-polarization optical coherence tomography

Darren M. Isfeld, Conrado Aparicio, Robert S. Jones

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Secondary decay (caries) under ceramic orthodontic brackets remains a significant dental problem and near infrared cross-polarization optical coherence tomography (CP-OCT) has the potential to detect underlying demineralization. The purpose of this study was to determine the effect of crystalline structure and chemical composition of ceramic brackets on CP-OCT imaging. Four ceramic brackets types, which were divided into monocrystalline and polycrystalline, were examined using CP-OCT. The results of this study demonstrated that the crystallinity of the ceramic brackets affected the 1310 nm CP-OCT imaging with the greatest attenuation seen in polycrystalline alumina brackets. The alumina polycrystalline bracket materials had significantly higher attenuation and scattering than alumina monocrystalline brackets (p < 0.05, ANOVA, Bonferroni). Additionally, bracket base morphology and composition affected NIR light attenuation. There was considerable attenuation in bracket bases that contained additive zirconium spheres (∼30 μm) and this alteration was significantly greater than the jagged alumina crystallographic alterations found in the other bracket systems (p < 0.05, ANOVA, Bonferroni). Noninvasive, near infrared (NIR) cross-polarization optical coherence tomography (CP-OCT) has potential to effectively image through portions of ceramic brackets; however, further investigation into the optical effects of resin integration in the base portion of the brackets is warranted.

Original languageEnglish (US)
Pages (from-to)516-523
Number of pages8
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume102
Issue number3
DOIs
StatePublished - Apr 2014

Keywords

  • dental caries
  • dental ceramics
  • imaging systems
  • medical optics instrumentation
  • optical coherence tomography
  • polarization

Fingerprint

Dive into the research topics of 'Assessing near infrared optical properties of ceramic orthodontic brackets using cross-polarization optical coherence tomography'. Together they form a unique fingerprint.

Cite this