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How reliable and accurate is the shade determination of premolars by spectrophotometry?

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Abstract

Objectives

To evaluate the reliability and accuracy of spectrophotometric shade determination of premolars and to compare the results with those for incisors.

Material and methods

Fifty-seven participants with natural maxillary incisors and premolars were recruited to investigate the research question. The colour of test teeth (incisors, n = 210; premolars, n = 192) was measured by use of the Vita Easyshade Advance (ES-A) and Vita Easyshade V (ES-V). Accuracy was evaluated by rating the shade tab matches recommended by the devices (scale, 1 = excellent match to 3 = mismatch). Inter-device reliability between the ES-A and ES-V for measurement of incisors and premolars was evaluated using intra-class correlation coefficients (ICC). The ratings for the accuracy of the devices were analysed using descriptive and bivariate statistics. A linear regression model was used to evaluate possible independent influencing confounders on the shade match.

Results

Inter-device agreement of the ES-A and ES-V for measurement of incisors and premolars was excellent for all colour components (ICC > 0.9). The accuracy of both devices was acceptable to excellent for incisors and premolars, although the ES-V was more accurate than the ES-A (p < 0.001). No significant difference in accuracy was detected between premolars and incisors (p = 0.182). The linear regression model confirmed the bivariate testing.

Conclusions

The reliability and accuracy of spectrophotometric shade determination seem comparable for incisors and premolars. The recently introduced ES-V seems more accurate than its predecessor model. Further studies are needed to validate the results of this study.

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Acknowledgements

The authors thank the participants in the study for their cooperation and patience and Hazel Davies, copy editor, for English language revision. Anna-Luisa Klotz was supported by the GEROK program of the University of Heidelberg.

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Author notes

  1. Anna-Luisa Klotz and Yasamin Habibi contributed equally to this work.

Authors and Affiliations

  1. Department of Prosthodontics, Dental School, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany

    Anna-Luisa Klotz, Alexander Jochen Hassel, Peter Rammelsberg & Andreas Zenthöfer

Authors
  1. Anna-Luisa Klotz
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  2. Yasamin Habibi
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  3. Alexander Jochen Hassel
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  4. Peter Rammelsberg
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  5. Andreas Zenthöfer
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Corresponding author

Correspondence to Anna-Luisa Klotz.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from each participant included in the study.

Clinical relevance

The outcome of this study might help clinicians estimating the performance of electronic shade determination in premolars.

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Klotz, AL., Habibi, Y., Hassel, A.J. et al. How reliable and accurate is the shade determination of premolars by spectrophotometry?. Clin Oral Invest 24, 1439–1444 (2020). https://doi.org/10.1007/s00784-019-03162-x

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  • DOI: https://doi.org/10.1007/s00784-019-03162-x

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