Analysis of the width ratio and wear rate of maxillary anterior teeth in the Korean population

Abstract

PURPOSEThe purpose of this study was to compare the width ratio of maxillary anterior teeth according to age in the Korean population and to evaluate the maxillary central incisor width-to-length (W/L) ratio, given differences in age and gender.MATERIALS AND METHODSNinety-three Korean adults were divided into 3 groups (n = 31) by age. Group I was 20 - 39 years old, Group II was 40 - 59 years old, and Group III was over 60 years of age. After taking an impression and a cast model of the maxillary arch, the anterior teeth width ratio and central incisor W/L ratio were calculated from standard digital images of the cast models using a graph paper with a digital single lens reflex (DSLR) camera. The calculated ratios were compared among all groups and central incisor W/L ratio were analyzed according to age and gender. All comparative data were statistically analyzed with one-sample t-tests, one-way ANOVAs with Tukey tests, and independent t-tests.RESULTSNo significant differences in maxillary anterior teeth ratios were found among the age groups. The maxillary central incisor W/L ratios in Group III were the greatest and were significantly higher than those in the other groups. The central incisor W/L ratio of men was higher than that of women in Group II.CONCLUSIONMaxillary anterior teeth width ratios were similar in all age groups in the Korean population. The maxillary central incisor was observed as worn teeth in the group over 60 years of age, and a significant difference between genders was found in 40 to 50 year olds.

Evaluation of influence factors on the width, length, and width to length ratio of the maxillary central incisor: A systematic review and meta‐analysis

“…In the second phase of study selection, full‐text analysis was performed for 77 articles, resulting in 23 meeting the inclusion criteria and was, therefore, included in this systematic review (Figure 2). This review of the literature is based on 23 articles published from March 20, 2010, to July 25, 2019 2,8,9,17,18,20,21,25‐34 . In all, data from 3603 participants were recorded.…”

“…In addition, the different classifications included were the groups comparable, were cases and controls matched appropriately, were the same criteria used for identification of cases and controls, was exposure measured in a standard, valid, and reliable way, was exposure measured in the same way for cases and controls, and were confounding factors identified (Table 1, Figure 3). 8,9,17,18,20,21,[25][26][27][28][29][30][31][32][33][34] In all, data from 3603 participants were recorded. Data collected was reported from each study.…”

Clinical threshold of the translucency parameter of maxillary central incisors

“…Clinically, it is often found that there is obviously transparent enamel in the central incisors of young people. Furthermore, the translucency in the senior group was higher than that in the middle-aged group, which might be related to the reduction in the incisal edge thickness of the central incisors 26) . At the same time, the dentin also displayed an increasing trend of translucency with age 3) , which also led to the increase in translucency in the central incisors.…”

The use of golden proportion in dentistry: a integrative review

“…Analysis of the golden ratio in different ethnicities show that countries such as Saudi Arabia, India, Japan, Turkey and Ireland present in their population some references to the measurements established by the golden ratio [14][15][16][17][18][19][20], whilst Korea, Pakistan, Colombia, China, Hungary, Malaysia, Iran and Brazil [21][22][23][24][25][26][27][28][29][30][31][32] did not show any relation to the golden ratio.…”