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Investigating the Consistency of a Dentiform with Artificial Caries

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Original languageEnglish
Pages (from-to)225-226
JournalJournal of dental education
Issue number2
Publication statusPublished - Feb 2019

King's Authors


Plastic analogue teeth or dentiforms have been used in dentistry for over one hundred years. Plastic analogue teeth offer standardization in form and wide choice of teeth and pathological carious lesions. The teeth can be manufactured multilayered with enamel, dentine, and pulp tissue simulations. The use of simulated caries in plastic analogue teeth is now considered appropriate to be used in national licensing examinations, according to the National Dental Examining Board of Canada in 2014. This study was part of a larger study investigating the impact of different teaching methods on clinical skills. The aim of this pilot study was to investigate the consistent manufacture of Frasaco dentiforms with prepared occlusal cavities filled with artificial caries. Methods: Ethical approval for this project was granted from King’s College London Research Committee (reference CREC 06/07-222). Frasaco dentiforms (n=20) that had a pre-manufactured cut occlusal cavity were micro-computed tomography imaged to volumetrically assess the variation. Results: The mean volume of the dentiforms was 922.00 mm³ with a lower 95% confidence level of 921.01 mm³ and a 95% upper confidence level of 922.98 mm³, though the range was 918 to 926 mm³. The Frasaco teeth had a high level of consistency, but there were outliers evident. Conclusion: Consistent manufacture is important to ensure that, in high-stakes examinations, performance achieved is the result of the candidate and not due to manufacturing variation. To assess students fairly, it is important that manufactured teeth are consistent for reliable and defendable results in high stakes examinations.

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