Characterization of ankylosis in traumatized permanent incisors.
Published: 2005
Language: eng
Number of pages: 113
Description: The objectives of this investigation were to assess the reliability of expert raters to diagnose ankylosis by percussion sound alone and to identify and quantify differences between ankylosed and non-ankylosed incisors using the PeriotestRTM and digital sound wave analysis. Four paediatric dentists demonstrated 'substantial' overall agreement detecting ankylosis by percussion sound alone. The reliability of diagnosis of ankylosis by percussion sound demonstrated sensitivity of 85 per cent and specificity of 91 per cent. Mean PeriotestRTM values (PTV) for ankylosed incisors were statistically significantly lower than mean PTV for non-ankylosed incisors for within-subjects, between-subjects and in overall comparisons. Digitally recorded percussion sound signals generated from ankylosed incisors exhibited a statistically higher proportion of their energy in the high frequency bands as determined by 7-level Daubechies wavelet decomposition time-frequency analysis. Non-ankylosed incisors exhibited a statistically higher proportion of their energy in the lower frequency bands.
Notes: Source: Masters Abstracts International, Volume: 44-02, page: 0806.

Thesis (M.Sc.)--University of Toronto, 2005.

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