Analysis of the relationship between periodontal phenotype and crown-root ratio in anterior teeth
10.3969/j.issn.1673-9701.2025.11.003
- VernacularTitle:上前牙牙周表型与冠根比间的关系分析
- Author:
Haojie LI
1
;
Chenghui MA
1
;
Lingxia HUANG
1
;
Jiayong ZHONG
1
Author Information
1. 嘉兴市第一医院口腔科,浙江嘉兴 314000
- Publication Type:Journal Article
- Keywords:
Periodontal phenotype;
Anterior teeth;
Crown-to-root ratio;
Width of keratinized gingival
- From:
China Modern Doctor
2025;63(11):9-12
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the characteristics of the crown-root ratios of the anterior teeth in subjects with different periodontal phenotypes in healthy population.Methods A total of 100 periodontally healthy young volunteers were selected,there were 53 females and 47 males,totaling 594 anterior teeth were included in the study.The periodontal probe method was used to determine the periodontal phenotypes of different tooth positions,with 108 cases of thick gingival type and 90 cases of thin gingival type in mesial incisors;95 teeth of thick gingival type and 103 teeth of thin gingival type in lateral incisors,and 98 teeth of thick gingival type and 100 teeth of thin gingival type in cuspids.Panoramic radiographs were taken,crown length and root length of upper anterior teeth were calculated,and crown-root ratio was calculated,to compare and analyze the differences between the results of the two groups.Results The crown-to-root ratio in thin gingival group of mesial incisors and lateral incisors were higher than those in thick gingival group,and the root length was smaller than thick gingival group.The difference was statistically significant(P＜0.05).The keratinized gingival width of thin gingival group was less than that of thick gingival group,and the difference was statistically significant(P＜0.05).Conclusion The relatively high crown-to-root ratio of mesial incisors and lateral incisors in patients with thin gingival phenotypes and the lesser width of keratinized gingiva in thin gingival phenotypes than thick gingival phenotypes.and risk assessment should be taken into account in the restorative system as well as in the orthodontic design of the anterior tooth movement.
