OBJECTIVE: To provide a pancontinental overview on the prevalence of the CoC in primary maxillary second molars and permanent maxillary molars.
METHODS: An electronic search was conducted on ten databases without year restrictions up to July 2020. All cross-sectional studies published in the English language reporting prevalence estimate of CoC were included. A modified version of the Newcastle-Ottawa scale was used to assess study quality. Meta-analyses were conducted for studies that reported data using Dahlberg and ASUDAS classification across continents.
RESULTS: For qualitative synthesis, 142 studies (45,327 participants) were included, of which 130 studies had moderate risk of bias. Random effects meta-analysis was performed for 41 studies. For prevalence of CoC in primary maxillary second molars, the estimate was 72% (2,829 participants). The overall percentage attained for permanent maxillary molars was 59% (16,607 participants) for first molars; 8% (2,277 participants) for second molars; and 10% (89 participants) for third molars. Subgroup analysis revealed the European continent reported the highest prevalence in permanent maxillary first and second molars.
CONCLUSIONS: Primary maxillary second molars recorded highest prevalence of CoC followed by permanent maxillary first, third and second molars. Pancontinental studies with regard to primary maxillary second molars are warranted.
目的:提供关于CoC在上颌第二磨牙和上颌永久磨牙中患病率的泛大陆概述。
方法:截至2020年7月,对10个数据库进行了电子搜索,没有年份限制。所有发表在英语语言报告中的CoC患病率估计的横断面研究都包括在内。纽卡斯尔-渥太华量表的修订版用于评估研究质量。对使用Dahlberg和ASUDAS分类报告数据的研究进行了荟萃分析。
结果:对于定性合成,纳入142项研究(45,327名参与者),其中130项研究存在中等偏倚风险.对41项研究进行随机效应荟萃分析。关于CoC在上颌第二磨牙中的患病率,估计为72%(2,829名参与者).第一磨牙的永久性上颌磨牙的总百分比为59%(16,607名参与者);第二磨牙为8%(2,277名参与者);第三磨牙为10%(89名参与者)。亚组分析显示,欧洲大陆报告的永久性上颌第一和第二磨牙患病率最高。
结论:上颌第二磨牙的CoC患病率最高,其次是永久性上颌第一磨牙,第三和第二磨牙。关于原发性上颌第二磨牙的泛大陆研究是有必要的。