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An update on optical coherence tomography in dentistry

From Volume 41, Issue 2, March 2014 | Pages 174-180

Authors

D McG Clarkson

BSc, MPhil, PhD

Development and Quality Manager, Department of Clinical Physics and Bioengineering, FM Building, University Hospitals Coventry and Warwickshire NHS Trust, Coventry CV2 2DX, UK

Articles by D McG Clarkson

Abstract

An update and overview of the use of optical coherence tomography (OCT) in dentistry is described. Specific aspects discussed include the evolution of the technology and the basic process of light beam interference used to obtain OCT images. In addition, aspects of the optical properties of dentine and enamel and the range of current diagnostic applications of OCT in dentistry are reviewed.

Clinical Relevance: The technique of optical coherence tomography is considered to be significant since the technology involved allows imaging using light to around 2–3 mm in teeth and can, for example, allow the extent and progression of carious lesions to be determined.

Article

While ionizing radiation has generally been regarded as the dominant imaging modality able to provide useful imaging information within the field of dentistry, there is increasing interest in the use of optical coherence tomography (OCT) to provide unique imaging information relating to dental structures. Significant early advances in OCT technology for medical imaging were undertaken at the Massachusetts Institute of Technology and the Massachusetts General Hospital.1,2,3 The basic principle utilized of splitting, manipulating and recombining beams of light has been known in the world of physics since around 1881, with the invention of the Michelson interferometer.4 OCT has made greatest clinical impact in ophthalmology where it has become the method of choice for scanning of retinal structures. OCT technology was initially developed5 for internal inspection of precision fabricated optical structures and such industries continue to drive the core technologies of medical OCT applications.

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