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Radiographic Assessment of Root/Crown Ratio and Short Root Anomaly: A Retrospective Study in Chinese Population
Yuer Ye1, Yiqi Pan1, Hui Zhang1
1Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China.
Short root anomaly (SRA) is relatively common in the Chinese population, affecting 2.7% of patients, particularly females. This condition most frequently impacts incisors and premolars, with the maxillary central incisor being most affected.
Area of Science:
- Dentistry
- Oral Radiology
- Human Anatomy
Background:
- Racial and gender disparities in tooth root development and short root anomaly (SRA) prevalence are suggested.
- Limited data exists on SRA within Chinese populations.
Purpose of the Study:
- To determine the prevalence of SRA in the Chinese population.
- To analyze the characteristics of the root-to-crown (R/C) ratio in relation to SRA.
Main Methods:
- Retrospective analysis of 27,142 teeth from 1000 Chinese subjects using panoramic radiographs.
- Modified Lind's criteria applied for crown and root length measurements.
- Statistical analysis included Fisher's exact test and t-tests for gender and R/C ratio comparisons.
Main Results:
- SRA prevalence was 2.7% in patients and 0.309% in teeth.
- Females exhibited a significantly higher prevalence of SRA than males (p < 0.01).
- SRA predominantly affected incisors (83.72%) and premolars (16.28%), with maxillary central incisors most affected. Significant differences in R/C ratios were noted by gender and jaw position.
Conclusions:
- Short root anomaly is relatively common in the Chinese population, necessitating clinical awareness.
- SRA is more prevalent in females and shows specific tooth-type predilection, particularly maxillary central incisors.
- Findings offer valuable insights for early diagnosis and management of SRA in Chinese individuals.
