A computerized tooth-width analysis.

T ooth-width ratios are used diagnostically to quantify the harmony between the mandibu-lar and maxillary arches. A number of analyses have been developed to compare the tooth-width ratios of malocclusions to standardized norms. 1-4 The Ho-Freer Graphical Analysis of Tooth-Width Discrepancy (GATWD) provides a simple graphic description of tooth-width relationships between the arches, a comprehensive representation of tooth-width ratios in various arch segments , and a method of localizing tooth-width discrepancies. 5,6 Although the GATWD is more comprehensive than previous analyses, it is also more labor-intensive. Now, a personal-computer-based version of the GATWD enables clinicians to incorporate the analysis into their routine diagnosis and treatment planning, as well as to identify tooth-size mismatches that may develop toward the end of treatment.