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:探討高齡白內障患者術前角膜內皮功能狀態。方法:對從2007年11月到2008年10月的66例年齡在80歲或以上的左眼白內障患者術前角膜內皮細胞形態及中央角膜厚度進行回顧性分析。分析參數包括角膜內皮細胞密度,內皮細胞平均面積,最大細胞面積和最小細胞面積,內皮細胞變異系數,面積標準差,六角形細胞比例及角膜中央厚度。結果:患者的角膜內皮細胞平均密度為(2720.3±324.6)個/mm2,平均細胞面積為(375.4±70.3)μm2,最大細胞面積(922.1±243.5)μm2,最小細胞面積(131.2±40.2)μm2,面積標準差(143.5±34.8)μm2,細胞變異系數(38.0±7.3)%,六角形細胞比例(52.8±10.1)%。中央角膜厚度與角膜內皮細胞密度之間無相關性。結論:高齡人白內障患者的角膜內皮細胞密度高,角膜功能基本正常，是保持角膜透明的基礎,為眼內手術或治療提供安全保障。