Evidence map›Paper›PMID 40240494›Full record

ArticleScientific reports2025

Epidemiological and imaging characteristics of impacted maxillary incisors and effect on root development.

Yucong Zhou, Mengning Bi, Huiquan Yang, Xiaoya He, Xuanyu Wang, Zhihua Chen, Fang Ji

Abstract read
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. MSX1 and PAX9 Polymorphisms and Their Association With Lateral Incisor Morphology in Patients With Maxillary Canine Impaction.Medical science monitor : international medical journal of experimental and clinical research · 2026
    Observational
  2. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Yucong ZhouDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China.
Mengning BiDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China.
Huiquan YangDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China.
Xiaoya HeDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China.
Xuanyu WangDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China.
Zhihua ChenDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China.
Fang JiDepartment of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No.639 Zhizaoju Road, Shanghai, 200011, China. Smilefang98@163.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Despite extensive research on maxillary impacted canines, studies specifically investigating maxillary impacted incisors remain limited. This retrospective study aimed to determine the prevalence of impacted teeth among adolescent orthodontic patients, analyze the imaging characteristics of maxillary impacted incisors, and evaluate factors influencing root development. From a cohort of 2163 underage patients who attended the children malocclusion special clinic between August 2022 and July 2024, individuals with impacted teeth were identified and their clinical data were collected. Subsequently, detailed analyses were conducted on impacted maxillary incisors using high-quality Cone-beam computed tomography (CBCT). There were 157 patients with 205 impacted teeth observed, presenting a prevalence rate of 7.26%. Maxillary canines were the most popular impacted teeth (39.51%), followed by maxillary incisors (30.24%). The tooth dilaceration demonstrated a significant relationship with the three-dimensional (3D) locations of tooth. Impacted teeth situated in low impacted depth (P < 0.05) and those with buccal-lingual (P < 0.05) or vertical (P < 0.01) orientations showed reduced susceptibility to root dilaceration. A positive correlation was observed between the Upper Incisor to Palatal Plane Angle (UI-PP) and both the probability (P < 0.05) and earlier occurrence (P < 0.01) of root dilaceration. The root length of impacted tooth was positively correlated with age (P < 0.05). Besides, the average root length of the impacted central incisors was 1.84 mm shorter than the contralateral. The prevalence of impacted teeth in our orthodontic specialist clinics was 7.26%, and 69.76% of impacted teeth were maxillary anteriors. The development of tooth roots was mainly influenced by age and 3D location. These findings enhance clinicians' understanding of impacted maxillary incisor characteristics and factors affecting the root development. The UI-PP proves to be an effective 3D location evaluation indicator. Early intervention is recommended for impacted teeth lacking sufficient space for root development, which could facilitate root development and minimize the risk of root dilaceration.

Indexed as

IncisorMaxillaTooth, ImpactedTooth RootAdolescentChildCone-Beam Computed TomographyFemaleHumansMalePrevalenceRetrospective StudiesDilacerationImpacted toothImpacted tooth morphologyManagementMaxillary incisorsOrthodontics

Identifiers

PMID40240494
PMCPMC12003843

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.