Faculty Odonto-Stomatology, Can Tho University of Medicine and Pharmacy, 700000 Can Tho, Vietnam.
Department of Pediatrics Dentistry and Orthodontics, Faculty Odonto-Stomatology, Can Tho University of Medicine and Pharmacy, 700000 Can Tho, Vietnam.
J Clin Pediatr Dent. 2024 Nov;48(6):187-196. doi: 10.22514/jocpd.2024.139. Epub 2024 Nov 3.
To evaluate the effects of facemask therapy on skeletal class III malocclusion in the Vietnamese population. This interventional trial enrolled a total of 31 children, dividing them into two age groups: Children aged 7 to 9 (54.8%), who were in the pre-pubescent or early mixed dentition stages, comprised one group. The other group consisted of 14 children, representing 45.2%, who were in the mid-pubescent or late mixed dentition stage, aged 7 to 9. All of them had skeletal class III maxillary deficiency (Angle formed by the A-nasion line and B-nasion line ≤0°, Wits appraisal ≤2). The study aimed to investigate how age affects changes in lateral cephalometric measurements before and after treatment. The research involved clinical records, lateral cephalograms, and dental casts. Both qualitative and quantitative variables were evaluated using specific statistical tests. Fisher's exact test was used for qualitative variables, while paired samples -tests and independent samples -tests were used for quantitative variables. In cases where the data did not follow a normal distribution, the Wilcoxon test and Mann-Whitney U-test were used ( ≤ 0.05). The study found that using a facemask improved the skeletal, dental and soft tissues. It led to a forward movement of the maxilla and a rotation of the mandible, resulting in a better relationship between the maxilla and mandible. The upper incisors shifted from a crossbite to a positive overbite, and the upper lip protruded forward. The concave face became more prominent and aesthetically pleasing. Most individuals (80.6%) had positive outcomes, with the highest proportion among children aged 7-9 years. Based on the study's findings, the facemask was highly effective for both age groups in skeletal class III malocclusion. The group of children aged 7-9 years with maxillary deficiency was more efficacious than the group of children aged 10-12 years.
评价面罩治疗对越南人群中骨性 III 类错牙合的影响。这项干预性试验共纳入 31 名儿童，将他们分为两组年龄：7-9 岁的儿童（54.8%）处于替牙前期或混合牙列早期，为一组；另一组由 14 名儿童（45.2%）组成，他们处于替牙中期或混合牙列晚期，年龄为 7-9 岁。他们都有骨性上颌骨不足（A-前颅底线和 B-前颅底线形成的角度≤0°，Wits 评价≤2）。本研究旨在探讨年龄如何影响治疗前后侧颅面测量的变化。研究涉及临床记录、侧颅面片和牙模。使用特定的统计检验评估定性和定量变量。Fisher 确切检验用于定性变量，而配对样本 t 检验和独立样本 t 检验用于定量变量。在数据不服从正态分布的情况下，使用 Wilcoxon 检验和 Mann-Whitney U 检验（≤0.05）。研究发现，使用面罩可改善骨骼、牙齿和软组织。它导致上颌向前移动和下颌旋转，从而改善上颌和下颌之间的关系。上颌切牙从前牙反牙合转变为正覆牙合，上唇前突。凹面变得更加突出，更具美感。大多数患者（80.6%）有良好的结果，7-9 岁儿童的比例最高。基于研究结果，面罩对骨性 III 类错牙合的两个年龄组都非常有效。上颌骨不足的 7-9 岁儿童组比 10-12 岁儿童组更有效。
