Department of Orthodontics, Faculty of Dentistry, Dental School, Federal University of Pará (UFPA), Augusto Correa St., no. 1, Belém, Pará, 66075-110, Brazil.
Facultad de Odontologia, Universidad Católica Redemptoris Mater, Managuá, Nicaragua.
Prog Orthod. 2020 Sep 5;21(1):35. doi: 10.1186/s40510-020-00328-2.
The aim of this systematic review and meta-analysis is to assess the degree of stability of anterior open bite (AOB) treatment performed through the molar intrusion supported with skeletal anchorage at least 1 year posttreatment.
This study was registered in PROSPERO (CRD42016037513). A literature search was conducted to identify randomized (RCT) or non-randomized clinical trials based including those considering before and after design. Data sources were electronic databases including PubMed, Cochrane Library, Science Direct, Google Scholar, Scopus, Lilacs, OpenGrey, Web of Science, and ClinicalTrials.gov . The quality of evidence was assessed through the JBI tool and certainty of evidence was evaluated through the GRADE tool. Random effects meta-analysis was conducted when appropriate.
Six hundred twenty-four articles met the initial inclusion criteria. From these, only 6 remained. The mean posttreatment follow-up time was 2.5 years (SD = 1.04). The overbite showed a standardized mean relapse of - 1.23 mm (95% CI - 1.64, - 0.81, p < 0.0001). Maxillary and mandibular incisors presented a non-significant mean relapse, U1-PP - 0.04 mm (95% CI - 0.55, 0.48) and L1-MP - 0.10 mm (95% CI - 0.57, 0.37). Molar intrusion showed a relapse rate around 12% for the maxillary molars and a 27.2% for mandibular molars.
The stability of AOB through molar intrusion using TADs can be considered relatively similar to that reported to surgical approaches, since 10 to 30% of relapse occurs both in maxillary and mandibular molars. The level of certainty ranged between very low and low. RCTs reporting dropout during the follow-up are in dire need.
本系统评价和荟萃分析的目的是评估使用骨锚固支持的磨牙内倾治疗前牙开（AOB）至少 1 年后的稳定性程度。
本研究已在 PROSPERO（CRD42016037513）注册。进行了文献检索，以确定包括考虑前后设计的随机对照试验（RCT）或非随机临床试验。数据来源包括电子数据库，如 PubMed、Cochrane Library、Science Direct、Google Scholar、Scopus、Lilacs、OpenGrey、Web of Science 和 ClinicalTrials.gov。使用 JBI 工具评估证据质量，并使用 GRADE 工具评估证据确定性。在适当的情况下进行随机效应荟萃分析。
最初纳入标准有 624 篇文章。其中只有 6 篇符合条件。平均治疗后随访时间为 2.5 年（SD=1.04）。覆盖度显示标准化平均复发为-1.23mm（95%CI-1.64，-0.81，p<0.0001）。上颌和下颌切牙显示出非显著的平均复发，U1-PP 为-0.04mm（95%CI-0.55，0.48）和 L1-MP 为-0.10mm（95%CI-0.57，0.37）。磨牙内倾显示上颌磨牙的复发率约为 12%，下颌磨牙的复发率为 27.2%。
使用 TAD 进行磨牙内倾治疗 AOB 的稳定性可以被认为与手术方法相似，因为上颌和下颌磨牙都有 10%至 30%的复发率。确定性水平介于极低和低之间。非常需要报告随访期间脱落的 RCT。
