The figure illustrates that some factors can be so prominent that they in fact would have formed a larger sector. In this case, a slight improvement is not enough, radical improvements are needed. The case illustrated has a high caries activity with several new cavities per year. Diet factor is strongly negative, and plaque contains high proportions of mutans streptococci and lactobacilli. There are possibilities for the individual to change sector size.
Dental personnel knows how to estimate risk factors.