Apical anatomy of mandibular second premolars at Nolla stage 8
Jingchao Han, Xiangyu Ma, Mingru Fan, Jianli Xie · 2026
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Description
Jingchao Han, Xiangyu Ma, Mingru Fan, and Jianli Xie measure the root tips of developing lower second premolars in Chinese patients. The teeth studied were at a set growth stage, when the root is still forming. Half had a cusp deformity that can crack and infect the root; half were normal. Three-dimensional scans let the team measure the root opening and any dark zone around it.
In both groups, the opening was wider from cheek to tongue than front to back. Girls measured smaller than boys on every dimension. Deformed teeth that had not yet developed infection matched normal teeth closely on all measures. The authors present the numbers as the first scan-based reference for this tooth at this stage, useful when judging early infection and planning treatment in young patients.
Catalog record
| CREATOR | Jingchao Han, Xiangyu Ma, Mingru Fan, Jianli Xie |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 35 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |