ObjectivesTo systematically review the effectiveness of one-phase treatment and two-phase treatment on the incidence of incisors trauma in patients with deep overjet, and to provide scientific basis for the selection of clinical treatment plans.MethodsPubMed, The Cochrane Library, Web of Science, CBM, CNKI, VIP and WanFang Data databases were searched to collect randomized controlled trials (RCTs) on the clinical effectiveness of one-phase treatment and two-phase treatment on the incidence of incisors trauma from inception to December 20th, 2017. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Meta-analysis was then performed by using RevMan 5.3 software.ResultsA total of 4 studies were included involving 613 patients. The results of meta-analyses showed that, there was no significant difference in the final overjet after one-phase treatment and two-phase treatment (functional appliance and headgear) (MD=–0.23, 95%CI –0.57 to 0.11, P=0.19). However, the new incidence of incisor trauma was significantly less for two-phase treatment group (functional appliance and headgear) (RR=0.69, 95%CI 0.48 to 0.99, P=0.05).ConclusionsPatients underwent two-phase treatment have lower incidence of dental trauma than one-phase treatment. Due to limited quality and quantity of the included studies, more high quality studies are required to verify the above conclusion
目的:探讨高龄白内障患者术前角膜内皮功能状态。方法:对从2007年11月到2008年10月的66例年龄在80岁或以上的左眼白内障患者术前角膜内皮细胞形态及中央角膜厚度进行回顾性分析。分析参数包括角膜内皮细胞密度,内皮细胞平均面积,最大细胞面积和最小细胞面积,内皮细胞变异系数,面积标准差,六角形细胞比例及角膜中央厚度。结果:患者的角膜内皮细胞平均密度为(2720.3±324.6)个/mm2,平均细胞面积为(375.4±70.3)μm2,最大细胞面积(922.1±243.5)μm2,最小细胞面积(131.2±40.2)μm2,面积标准差(143.5±34.8)μm2,细胞变异系数(38.0±7.3)%,六角形细胞比例(52.8±10.1)%。中央角膜厚度与角膜内皮细胞密度之间无相关性。结论:高龄人白内障患者的角膜内皮细胞密度高,角膜功能基本正常，是保持角膜透明的基础,为眼内手术或治疗提供安全保障。