The effect of wavelength, bandwidth, and probe design and position on assessing the vitality of anterior teeth with laser Doppler flowmetry

International Journal of Paediatric Dentistry
E M RoebuckR Strang

Abstract

To investigate the effect of four variables: wavelength (633 nm and 780 nm), bandwidth filter (3 kHz, 15 kHz, 22 kHz), probe fibre separation (250 microns) and 500 microns) and distance of the probe from the gingival margin (2-3 mm and 4-5 mm) when assessing the vitality of anterior teeth with a laser Doppler flowmetry system. Split-mouth cohort clinical trial. Childrens dental clinic, Glasgow Dental Hospital and School. Sample included 11 non-vital maxillary incisors with necrotic pulps in 10 patients (mean age 12.25 years old). Recordings were taken from the non-vital tooth and from a vital maxillary incisor from the same patient, using all 24 combinations of the recording variables listed above. The vital/non-vital ratios of the signals from the 11 pairs of teeth were calculated and discriminant analysis applied to the data. Of the variables investigated, the combination of a 633 nm laser source with a 3 kHz bandwidth filter using a probe with a 500 microns fibre separation placed 2-3 mm from the gingival margin was the most reliable, with 10 out of a possible 11 true positives for pulpal necrosis, no false positives, and one equivocal diagnosis, and was the only combination that recorded a smaller blood flow from the non-vi...Continue Reading

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Citations

Dec 25, 2003·Archives of Oral Biology·Serkan PolatN Tülin Polat
Jan 1, 2009·International Journal of Dentistry·Eugene Chen, Paul V Abbott
Jan 22, 2005·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Takashi SasanoTakaaki Miyahara
Oct 6, 2005·Journal of Oral Rehabilitation·S PolatN T Polat
Jun 29, 2018·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Nahar GhouthHani Nazzal
May 23, 2009·International Endodontic Journal·H Jafarzadeh
Nov 7, 2009·International Endodontic Journal·N P ChandlerB D Monteith
Jul 1, 2018·Clinical Oral Investigations·S KnörzerG Schmalz
Nov 22, 2011·Journal of Endodontics·Eugene Chen, Paul V Abbott

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