ABSTRACT Objective This study aimed to evaluate associations between facial measurements and maxillary anterior tooth dimensions using integrated three‐dimensional (3D) facial and intraoral datasets. Materials and Methods Eighty‐one participants underwent facial and intraoral 3D scanning. Intraoral parameters included mesiodistal (MeanW1–3) and cervicoincisal dimensions (MeanL1–3) of maxillary anterior teeth and canine tip‐to‐tip distance (TTD). Extraoral parameters comprised interpupillary (IPD), innercanthal (ICD), and interalar distances (IAD). Intra‐examiner reliability was evaluated, and Pearson correlation analyses and proportional ratios were calculated. Results Mean measurements were MeanW1 8.76 ± 0.54 mm, MeanL1 10.3 ± 1.01 mm, TTD 34.4 ± 2.21 mm, IAD 33.5 ± 2.89 mm, IPD 61.1 ± 3.29 mm, and ICD 37.0 ± 3.39 mm. IAD showed significant correlations with MeanW1 ( p = 0.022) and TTD ( p = 0.004), whereas IPD correlated only with TTD ( p = 0.006). ICD showed no significant correlations. The TTD/IAD ratio (1.03 ± 0.09) remained consistent across participants. One quarter of TTD approximated the width of a central incisor (MeanW1/TTD = 0.255 ± 0.014). Conclusion IAD demonstrated the most consistent association with anterior tooth dimensions. The ratio between TTD and IAD was 1.03. Clinical Significance The established ratio between TTD/IAD was approximately 1:1, and one quarter of the TTD corresponded to the width of a central incisor. These measured proportions provide quantitative facial and dental relationships that support the preliminary estimation of anterior tooth dimensions when pre‐extraction records are absent. Trial Registration https://drks.de/search/de/trial/DRKS00030166
Seidel et al. (Mon,) studied this question.