PDF(Pubmed)
Abstract：
OBJECTIVE: To determine whether the successful management of palatally displaced permanent canines (PDCs) can be achieved by the interceptive extraction of primary maxillary canines.
METHODS: Digital databases (Medline, Scopus, Web of Science, and Cochrane) were searched to retrieve articles published from 1952 to April 2016. The university librarian developed search strategies for each database. Two calibrated reviewers independently reviewed potentially related titles and abstracts. Papers meeting the inclusion and exclusion criteria were read in full. The selected articles were evaluated and scored according to methodological quality criteria.
RESULTS: Four randomized clinical trials (RCTs) were included in the systematic review. Compared with two older studies, two more recent RCTs were found to have better study designs, were better conducted, and involved better reporting of the results. The included studies compared intervention groups (children with PDCs undergoing extraction of primary canines) with controls (subjects with PDCs but no primary canine extractions). In three of the four studies, the interceptive extraction of primary canines facilitated eruption of PDCs in more than 65% of cases. Overall, the intervention groups had a markedly higher incidence of successful eruption of PDCs (50%-69%) compared with the control groups (36%-42%).
CONCLUSIONS: Based on the available evidence, it is reasonable to conclude that eruption of PDCs can be facilitated by extraction of primary canines. However, further high-quality, randomized clinical trials are warranted in other population groups. It is hoped that this study will help orthodontists make evidence-based decisions about clinically managing PDCs.
METHODS: Digital databases (Medline, Scopus, Web of Science, and Cochrane) were searched to retrieve articles published from 1952 to April 2016. The university librarian developed search strategies for each database. Two calibrated reviewers independently reviewed potentially related titles and abstracts. Papers meeting the inclusion and exclusion criteria were read in full. The selected articles were evaluated and scored according to methodological quality criteria.
RESULTS: Four randomized clinical trials (RCTs) were included in the systematic review. Compared with two older studies, two more recent RCTs were found to have better study designs, were better conducted, and involved better reporting of the results. The included studies compared intervention groups (children with PDCs undergoing extraction of primary canines) with controls (subjects with PDCs but no primary canine extractions). In three of the four studies, the interceptive extraction of primary canines facilitated eruption of PDCs in more than 65% of cases. Overall, the intervention groups had a markedly higher incidence of successful eruption of PDCs (50%-69%) compared with the control groups (36%-42%).
CONCLUSIONS: Based on the available evidence, it is reasonable to conclude that eruption of PDCs can be facilitated by extraction of primary canines. However, further high-quality, randomized clinical trials are warranted in other population groups. It is hoped that this study will help orthodontists make evidence-based decisions about clinically managing PDCs.
摘要：
目的：确定是否可以通过截获性拔除初级上颌犬齿来成功治疗pal位永久性犬齿（PDC）。
方法：数字数据库(Medline，Scopus,WebofScience,和Cochrane）进行搜索，以检索1952年至2016年4月发表的文章。大学图书馆员为每个数据库制定了搜索策略。两名经过校准的审阅者独立审阅了潜在相关的标题和摘要。完整阅读了符合纳入和排除标准的论文。根据方法学质量标准对所选文章进行评价和评分。
结果：4项随机临床试验（RCTs）纳入系统评价。与两项较早的研究相比，另外两个最近的RCT被发现有更好的研究设计，进行得更好，并涉及更好地报告结果。纳入的研究比较了干预组（患有PDC的儿童正在进行原发性犬的提取）与对照组（患有PDC但没有原发性犬的受试者）。在四项研究中的三项中，在超过65％的病例中，初级犬的拦截提取促进了PDC的爆发。总的来说,与对照组(36%-42%)相比,干预组成功喷发的发生率(50%-69%)明显较高.
结论：根据现有证据，可以合理地得出结论，提取初级犬科动物可以促进PDC的爆发。然而,进一步高质量，随机临床试验在其他人群中是必要的.希望这项研究将有助于正畸医生做出关于临床管理PDC的循证决策。
方法：数字数据库(Medline，Scopus,WebofScience,和Cochrane）进行搜索，以检索1952年至2016年4月发表的文章。大学图书馆员为每个数据库制定了搜索策略。两名经过校准的审阅者独立审阅了潜在相关的标题和摘要。完整阅读了符合纳入和排除标准的论文。根据方法学质量标准对所选文章进行评价和评分。
结果：4项随机临床试验（RCTs）纳入系统评价。与两项较早的研究相比，另外两个最近的RCT被发现有更好的研究设计，进行得更好，并涉及更好地报告结果。纳入的研究比较了干预组（患有PDC的儿童正在进行原发性犬的提取）与对照组（患有PDC但没有原发性犬的受试者）。在四项研究中的三项中，在超过65％的病例中，初级犬的拦截提取促进了PDC的爆发。总的来说,与对照组(36%-42%)相比,干预组成功喷发的发生率(50%-69%)明显较高.
结论：根据现有证据，可以合理地得出结论，提取初级犬科动物可以促进PDC的爆发。然而,进一步高质量，随机临床试验在其他人群中是必要的.希望这项研究将有助于正畸医生做出关于临床管理PDC的循证决策。
