Characteristics of included primary studies.

Background
This study evaluates whether exposure to dental X-ray examinations in childhood and adolescence results in negative health effects.
Material and methods
This systematic review includes both primary studies and systematic reviews available in Medline, Embase, and Web of Science databases. Six reviewers read the full text of the selected studies.
Results
The literature search resulted in 10,949 publications. After title and abstract screening, 55 publications were selected for full text reading, resulting in a total of 18 reports, 7 systematic reviews, and 11 primary studies for quality assessment.
Conclusion
None of the selected studies passed the quality assessment due to high or very high risk of bias. There is a gap of knowledge regarding negative effects of dental X-rays and a need for more accurate and updated studies.

背景
本研究旨在评估儿童及青少年时期接受牙科X射线检查是否会引发不良健康影响。

材料与方法
本项系统综述（systematic review）纳入了Medline、Embase及Web of Science数据库中收录的原创研究（primary studies）与系统综述类文献。共有6名审阅人员对入选文献的全文进行审阅。

结果
本次文献检索共获得10949篇学术文献。经过标题与摘要筛选后，遴选55篇文献开展全文审阅，最终纳入18份研究报告，其中包含7篇系统综述与11篇原创研究，用于质量评估。

结论
由于所有入选研究均存在较高或极高的偏倚风险，因此无一通过质量评价。目前关于牙科X射线检查的不良健康影响相关研究存在知识缺口，亟需开展更为精准且与时俱进的相关研究。