Zhao Wenting, Chen Yan, Kyung Hee-Moon, Xu Jin-Shuai
Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, South Korea.
Department of Orthodontics, Affiliated Hospital of Inner Mongolia Medical College, Hohhot, Inner Mongolia, China.
Int J Clin Pediatr Dent. 2020 Nov-Dec;13(6):668-676. doi: 10.5005/jp-journals-10005-1855.
To evaluate the treatment effects of tongue crib combination for treating severe skeletal Angle class III malocclusion in mixed dentition by X-ray cephalometric analysis.
A sample of 22 patients with severe skeletal Angle class III malocclusion of deficiency maxilla and overgrown mandible in mixed dentition was prospectively collected and equally divided into two groups. The patients (males 6 and females 5; mean age 8.35 ± 1.6 years) in the study group were treated with tongue crib combination, and the untreated patients (females 5, males 6; mean age 8.12 ± 1.3 years) served as the control group. X-ray cephalometric films were measured before and after treatment for comparing the change of occlusion, maxilla, mandible, and soft tissue. A paired -test was used by SPSS 21.0 statistical software. The intragroup data were compared by using the Wilcoxon test, and intergroup data were compared by using the Mann-Whitney test ( < 0.05).
In the study group, all patients got a favorable facial profile. Anterior and posterior teeth crossbite and upper and lower first molars relationships were improved. In cephalometric measurement, significant changes were noted in the maxillary skeletal component. The significant forward growth of the maxilla exhibited in a statistical increase of SNA, ANS-PNS, Wits appraisal, < 0.05. The mandible revealed slightly posterior rotation by no significant decrease in SNB and no change Co-Gn. After 1-year of retention, the changes of the teeth showed self-correction and facial profile improved further. Regarding vertical changes, maintenance of growth was shown a small non-significant increase of FMA, N-Me, and ANS-Me. There is a significant difference from those in the control group ( < 0.05).
Tongue crib combination is an effective device for the patients in the growing period with skeletal Angle class III malocclusion by improving the maxillary growth and limiting the mandibular growth.
Zhao W, Chen Y, Kyung H-M, Effectiveness of Tongue Crib Combination Treating Severe Skeletal Angle Class III Malocclusion in Mixed Dentition. Int J Clin Pediatr Dent 2020;13(6):668-676.
通过X线头影测量分析评估舌弓矫治器联合治疗混合牙列期严重骨性安氏III类错牙合的疗效。
前瞻性收集22例混合牙列期上颌骨发育不足、下颌骨过度生长的严重骨性安氏III类错牙合患者，并将其平均分为两组。研究组患者（男6例，女5例；平均年龄8.35±1.6岁）采用舌弓矫治器联合治疗，未治疗的患者（女5例，男6例；平均年龄8.12±1.3岁）作为对照组。在治疗前后拍摄X线头影测量片，比较咬合、上颌骨、下颌骨及软组织的变化。使用SPSS 21.0统计软件进行配对t检验。组内数据采用Wilcoxon检验进行比较，组间数据采用Mann-Whitney检验进行比较（P<0.05）。
研究组所有患者面部侧貌均得到改善。前后牙反牙合及上下第一磨牙关系均得到改善。在头影测量中，上颌骨骨骼成分有显著变化。上颌骨显著向前生长，表现为SNA、ANS-PNS、Wits值统计学增加（P<0.05）。下颌骨显示轻度向后旋转，SNB无显著下降，Co-Gn无变化。经过1年的保持，牙齿的变化显示出自我纠正，面部侧貌进一步改善。关于垂直变化，生长维持表现为FMA、N-Me和ANS-Me有小的无显著意义的增加。与对照组相比有显著差异（P<0.05）。
舌弓矫治器联合治疗对生长期骨性安氏III类错牙合患者是一种有效的矫治器，可促进上颌骨生长并限制下颌骨生长。
赵W，陈Y，Kyung H-M，舌弓矫治器联合治疗混合牙列期严重骨性安氏III类错牙合的疗效。国际临床儿科牙科学杂志2020；13(6)：668-676。
