Proportions of maxillary anterior teeth relative to each other and to golden standard in Chitwan Medical College

Abstract

Introduction: One of the most important aspects of aesthetic dentistry while restoring or replacing maxillary anterior teeth is the creation of harmonious proportion between the widths of them. The appearance of anterior teeth is criti­cal for an attractive face and pleasing smile. The dimensional determination of maxillary anterior teeth is an important factor for both, esthetic and function.
 Materials and Methods: This study was conducted in 140 dentate subjects. Out of the 140 subjects, 70 (50%) were males and 70 (50%) were females. The age of the patients in this study ranged from 18 to 50 years. Maxillary impressions of selected subjects were made with an irreversible hydrocolloid impression material. The mesiodistal width of the maxillary anterior teeth was measured from the casts with a Boley gauge.
 Results: The mean width ratios were 0.83 for right LI/CI and 0.85 for left LI/CI, 1.12 for right CN/LI and 1.1 for left CN/LI in total population. The mean width ratios in male group were 0.83 for right LI/CI and 0.87 for left LI/CI, 1.14 for right CN/ LI and 1.1 for left CN/LI. Similarly, in female group the mean width ratios were 0.82 for right LI/CI and 0.83 for left LI/CI, 1.1 for right CN/LI and 1.1 for left CN/LI.
 Conclusion: In the evaluation of LI/CI, CN/LI, WLRs golden proportion was not found in left and right for both sexes.

Assessment of Golden Proportion among Natural Maxillary Anterior Teeth of Global Population: A Systematic Review

“…While the 15 included studies performed evaluations with 2D photograph analysis [17,21,22,[31][32][33]35,[40][41][42]45] and direct clinical measurement of teeth [35,36,38,39]. In addition, 12 studies [22,30,32,[34][35][36][38][39][40][41]43,44] had a sample size of more than 100. This heterogeneity in the assessment methods and sample size could have influenced the observed review outcomes.…”

“…Out of which, 29 studies used 2D photograph analysis to investigate the occurrence of the GP between the perceived widths of the maxillary anterior teeth [14,15,17,20,21,25,26,[31][32][33][34]37,[40][41][42][45][46][47][48][49][50][51]56,[58][59][60]63,65,68]. Followed by 10 studies which used dental cast analysis [16,23,24,30,43,44,[53][54][55]61]. All these studies might have flaws, including the volumetric changes in the impression or inaccuracies in the pouring of dental casts and positional differences or magnification errors that can occur during 2D photography.…”

“…The number of participants ranged from 14 to 903. Twenty-nine studies analyzed GP through 2D photographs [14,15,17,20,21,25,26,31-33, 37,40-42,45-51,56,58-60,63,64,68], 10 studies used dental casts [16,23,24,30,43,44,[53][54][55]61] while six studies used both methods of assessment [18,19,22,57,62,65]. Six studies performed direct clinical measurements of teeth on patients [35,36,38,39,66,67] and one study reported digital impressions, digital casts, and 2D photograph analysis in their research [52] (Table 2).…”