Tang E L, So L L
Department of Children's Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong.
Cleft Palate Craniofac J. 1992 May;29(3):287-91. doi: 10.1597/1545-1569_1992_029_0287_pasomi_2.3.co_2.
The prevalence and severity of malocclusion among children with cleft lip and palate in Hong Kong has never been assessed or documented. A group of 20 children in the primary or early mixed dentition stages, with clefts of the lip and/or palate were assessed using the Occlusal Index. Results of this preliminary study showed that 92.3 percent of the male and 71.5 percent of the female subjects had severe malocclusion, which implied that comprehensive orthodontic treatment at a later stage would be needed. More than half (69.2% of the male, and 57.1% of the female subjects) had syndrome F, defined as mesial molar relationship, overjet, overbite, posterior crossbite, midline diastema, and midline deviation (Summers, 1966). Therefore malocclusion problems were shown to manifest early in patients with cleft lip and/or palate, and further that it is possible to assess malocclusion prevalence and severity in early stages of dental development.
香港唇腭裂儿童错牙合畸形的患病率及严重程度从未得到评估或记录。使用牙合指数对一组20名处于乳牙期或早期混合牙列期的唇裂和/或腭裂儿童进行了评估。这项初步研究的结果显示，92.3%的男性和71.5%的女性受试者患有严重错牙合畸形，这意味着后期需要进行全面的正畸治疗。超过半数（男性受试者的69.2%，女性受试者的57.1%）患有F综合征，定义为近中磨牙关系、覆盖、覆牙合、后牙反牙合、中线间隙和中线偏移（萨默斯，1966年）。因此，唇裂和/或腭裂患者的错牙合畸形问题在早期就会显现，而且在牙齿发育的早期阶段就有可能评估错牙合畸形的患病率和严重程度。
