Work

Analysis of enamel surface damage after selective laser ablation of composite from tooth surfaces

Year: 2013

Type: article

Abstract: OBJECTIVE: Resin-based composites are used for many applications in dentistry. They are difficult to remove without damage to the underlying enamel since they adhere strongly and are color matched to the tooth. The objective of this study was to determine if an automated laser scanning system with spectral feedback could be used for selective removal of residual orthodontic composite from tooth surfaces with minimal damage to the underlying enamel. MATERIALS AND METHODS: laser operating at a wavelength of 9.3 μm with a pulse duration of 10-15 μs and a pulse repetition rate of ~200 Hz was used to selectively remove composite from the buccal surfaces of extracted teeth. A spectral feedback system utilizing a miniature spectrometer was used to control the laser scanning system. Pulpal temperature measurements were performed during composite removal to determine if there was excessive heat accumulation. Conventional and digital microscopes were used to assess the amount of enamel lost during removal. RESULTS: was 19.3±4.1 s, fast enough for clinical feasibility. CONCLUSION: laser with spectral feedback, with minimal temperature rise within the pulp and with minimal loss of sound enamel.

Source: Photonics and Lasers in Medicine

DOI: 10.1515/plm-2013-0052

Authors: Kenneth H. Chan, Krista Hirasuna, Daniel Fried

Institution: University of California, San Francisco

Language: English

Topic: Laser Applications in Dentistry and Medicine

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funder: National Institute of Dental and Craniofacial Research