Modified extrinsic tooth stain index and its clinical applicability

The first index for the assessment of extrinsic stain was published by Lobene in 1986. Using the Lobene stain index in the field is very cumbersome as well it does not meet the general requirement of an index, i.e., the index is to be simple, rapid, highly reproducible, and sensitive enough to detect small changes in the staining level. Hence, there was a need to develop an alternative index for the same purpose. Hence, the only present study was undertaken to propose a modified stain index with more simplicity and clarity.

An observational study was carried out among 16-44-year-old participants who had at least six natural teeth and were generally healthy. For the revised index, the criteria and codes for intensity were kept the same as MacPherson Index but the criteria for recording area were modified. The data scoring for each tooth was mentioned in the proposed table and was recorded for each of the surfaces according to the proposed area and intensity codes. Analysis was carried out using SPSS version 21 (IBM, Inc. Virginia, United States). Inferential statistics were performed using the Mann-Whitney U-test. Nonparametric tests were applied following the imposition of a numerical interval scale the same as the Lobene index.

No statistically significant difference was appreciated for the area, intensity, and product of area × intensity when compared for measurements recorded by two indices as P > 0.05. Hence, validating the proposed index for the clinical application.

The proposed modified index may be advantageous over its conventional counterpart due to its ease of recording and concise scoring and also less complexity in the area to be recorded.