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. 2019 Dec 30;37(3):27-33.

Validation of the third molar maturity index (I3M): study of a Dominican Republic sample

L Gómez Jiménez  1 , L A Velandia Palacio  2 , S De Luca  3 , Y Ramirez Vasquez  1 , M Corominas Capellán  1 , R Cameriere  2
Affiliations

Validation of the third molar maturity index (I3M): study of a Dominican Republic sample

L Gómez Jiménez et al. J Forensic Odontostomatol. .

Abstract

This retrospective study aims to test the third molar maturity index (I3M) cut-off value of 0.08 for 18 years old in Dominican Republic population. Orthopantomograms of 513 subjects (284 females and 229 males) were evaluated, intra- and inter-observer agreement, ICC (intra-class correlation coefficient) values were 0.88% (95 % CI 0.86% to 0.91%), and 0.93% (95% CI 0.90% to 0.96%), for the intra- and inter-observer reliability, respectively. Accuracy in females was 0.96 (95% CI: 0.93-0.97); the sensitivity was 0.99 (95% CI: 0.96-0.99) and specificity was 0.92 (95% CI: 0.86-0.95). In males, the accuracy was 0.96 (95% CI: 0.93-0.98); the sensitivity was 0.94 (95% CI: 0.88-0.97) and specificity was 0.99 (95% CI: 0.95-0.99). The PPV (Positive Predictive Value) was 0.93 for females and 0.99 for males. The results of this study show that I3M can be used for discriminating adults from minors in Dominican Republic subjects around the legal age of 18 years old.

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Conflict of interest statement

The authors declare that they have no conflict of interest.

Figures

Figure 1
Figure 1
A and B. Boxplots of the relationship between chronological age and I3M in Dominican sample (females and males). Boxplot shows median and inter-quartile ranges, whilst ‘‘whiskers’’ are lines extending from box to highest and lowest values, excluding outliers. The horizontal red dotted line is at 18 years of age.
See this image and copyright information in PMC

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