A novel instrument to determine pulp proximity.

David G. Purton, Nicholas P. Chandler, Brian D. Monteith, Alison J. Qualtrough

    Research output: Contribution to journalArticlepeer-review


    The aim was to determine whether extracted teeth could be used to test the Prepometer instrument, which indicates pulp proximity with green/amber/red light emitting diodes. Third molars were reduced to a plane in dentine and Prepometer readings made. Dentine was removed in 0.5 mm increments and readings made until only lights 9 or 10 (red) showed. The teeth were sectioned and the dentine thickness measured. Analysis permitted construction of a highly significant predictor-model (p <0.01), the red/amber light boundary coinciding with a dentine thickness of 2.4 mm. The Prepometer was consistent in predicting pulp proximity but was more sensitive than specified.
    Original languageEnglish
    Pages (from-to)30-34
    Number of pages4
    JournalThe European journal of prosthodontics and restorative dentistry
    Issue number1
    Publication statusPublished - Mar 2009


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