Evidence map›Paper›PMID 35670864›Full record

ArticleClinical oral investigations2022

Cross-sectional study of posterior tooth root fractures in 2015 and 2019 in a Chinese population.

Xiao Pan, Rong Tang, Antian Gao, Yanqing Hao, Zitong Lin

Abstract read
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In one paragraph

Article in Clinical oral investigations, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
1.7field-weighted citation impact, top 17% of its field
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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

6 citing papers in PubMed, 10 citations in OpenAlex.

  1. Vertical Root Fracture in Endodontically Treated Teeth: Risk Factors and Future Directions.Australian endodontic journal : the journal of the Australian Society of Endodontology Inc · 2026
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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

5 authors at 2 institutions in 1 country.

Xiao PanDepartment of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Jiangsu Province, Zhong Yang Road 30, Nanjing City, 210008, People's Republic of China.
Rong TangDepartment of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Jiangsu Province, Zhong Yang Road 30, Nanjing City, 210008, People's Republic of China.
Antian GaoDepartment of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Jiangsu Province, Zhong Yang Road 30, Nanjing City, 210008, People's Republic of China.
Yanqing HaoDepartment of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Jiangsu Province, Zhong Yang Road 30, Nanjing City, 210008, People's Republic of China.
Zitong LinDepartment of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Jiangsu Province, Zhong Yang Road 30, Nanjing City, 210008, People's Republic of China. linzitong_710@163.com.ORCID http://orcid.org/0000-0002-3733-4974
Nanjing University · CNNanjing Medical University · CN

Funding

General project of Jiangsu Provincial Health Commission M2021077Nanjing Clinical Research Center for Oral Diseases no. 2019060009Scientific research fund of Jiangsu Medical Association SYH-3201150-0007(2021002)
6 · The paper itself

Abstract

objectivesThis study aimed to compare posterior tooth root fractures in endodontically treated teeth versus nonendodontically treated teeth in the Chinese population. MATERIALS AND

methodsWe investigated 500 root fractured posterior teeth in 461 Chinese patients. The clinical information (age, sex of patients, tooth type) were recorded. The fractured teeth were divided into endodontically treated root fractured (ETRF) teeth and nonendodontically treated root fractured (NETRF) teeth. The morphology of the fractured root (circular, oval, other), the orientation of fracture lines (vertical and non-vertical), the restorations performed (crown, filling, non-filling), and the position of the teeth in the dental arch (normal, misaligned) were evaluated based on cone-beam computed tomography images. These data were compared between 2015 and 2019. ETRF% was calculated as ETRF/ETRF + NETRF. Vertical% was calculated as vertical/vertical + non-vertical.

resultsThere were 177 ETRF teeth and 323 NETRF teeth in this population. The total ETRF% was 29.3% in 2015 and 37.6% in 2019 (P = 0.087). The proportion of vertical root fracture in the ETRF group increased significantly in 2019 compared with that in 2015 (46.2% vs. 80.2%, P = 0.000). The ETRF% in female patients increased by 16.8%, but increased by only 1.2% in male patients in 2019 compared with that in 2015. The ETRF% of mandibular and maxillary premolars increased by 48.5% and 29.3%, respectively. The proportion of crown restoration increased by 2.4% in 2019 compared with that in 2015 in the ETRF group.

conclusionsThe proportion of NETRF teeth and non-vertical root fractures in posterior teeth is high in this Chinese population. The number of vertical root fractures in endodontically treated teeth increased significantly from 2015 to 2019. CLINICAL RELEVANCE: More attention should be paid to endodontic treatment factors in the occurrence of root fractures, especially as female patients and premolars are more susceptible.

Indexed as

Fractures, BoneTooth FracturesTooth, NonvitalChinaCone-Beam Computed TomographyCross-Sectional StudiesFemaleHumansMaleTooth RootCone-beam computed tomographyEndodontically treated root fractured teethNonendodontically treated root fractured teethVertical root fracture

Identifiers

PMID35670864
OpenAlexW4281801990

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

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.