This research aimed to reexamine the interrelationship between gingival thickness (GT), keratinized gingiva width (KGW), papilla height (PH), and crown ratio (CR) using two assessment approaches: transgingival probing and an intraoral scanner (IOS). A total of 360 maxillary anterior teeth from 60 individuals were analyzed in this cross-sectional study. GT was recorded via transgingival probing with an endodontic spreader, while KGW, PH, and CR were measured digitally using an IOS. Statistical analyses involved one-way ANOVA, Student’s t-test, and Spearman’s rank correlation coefficients. The findings revealed a significant inverse association between GT and KGW in the central region (P=0.019). GT did not vary significantly among different teeth (P=0.06). Lateral teeth exhibited a lower PH (2.99 mm) compared to canines (P=0.047), whereas canines had a narrower KGW than central incisors (P=0.007). In the central area, a moderate positive correlation was observed between KGW and PH (P=0.01), while KGW and CR showed a weak negative relationship (P=0.043). In central teeth, GT and KGW, as well as PH and KGW, demonstrated moderate negative correlations, and a weak negative correlation existed between CR and KGW. The observation that KGW and GT were inversely related challenges the conventional assumption of a direct relationship between these parameters, with IOS-based measurement providing a refined perspective.
