Bratu Dana Cristina, Bălan Raluca Adriana, Szuhanek Camelia Alexandrina, Pop Silvia Izabella, Bratu Emanuel Adrian, Popa George
Department of Pedodontics and Orthodontics, Department of Dental Prostheses Technology, Faculty of Dental Medicine, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania;
Rom J Morphol Embryol. 2014;55(3):909-13.
Cephalometric analysis is frequently used in orthodontics for diagnostic purposes, in order to evaluate the positional relationship of the upper and lower jaw to the cranial base, as well as to objectively asses the way dental arches relate to one another and to the skeletal base. As with other dento-skeletal anomalies, the normal growth process can induce changes in these parameters. The purpose of this study is to evaluate the skeletal and dental changes that occur in growing patients with Angle Class II division 2 malocclusion. The study also focuses on analyzing and comparing several parameters in three groups of young patients of different ages, diagnosed with Class II division 2 malocclusion, in order to determine whether the anomaly worsens or improves during the patients' growth period. A total of 25 lateral skull teleradiographs were analyzed using cephX. The patients were divided into three groups (Group 1: 6-8 years, Group 2: 9-14 years, Group 3: 15-18 years). We used the cephalometric parameters described in Björk-Jarabak and Tweed analyses, as well as the relationship of the upper and lower central incisors to the skeletal landmarks. The statistical methods used in this study were the analysis of variance (ANOVA) and the unpaired Student's t-test (p<0.05). We concluded that, during the physiological growth process, the Angle Class II division 2 malocclusion has the following cephalometric characteristics: the maxillary central incisors were in accentuated retroclination, the interincisal angle was very obtuse, the gonial angle showed lower than normal values towards the end of the growth period, the lower anterior face height was definitely decreased, the mandibular body length was shorter than normal in the early growth period and the tendency towards a hypodivergent skeletal pattern remained stable during growth.
头影测量分析在正畸学中常用于诊断目的，以评估上下颌与颅底的位置关系，以及客观评估牙弓彼此之间以及与骨骼基底的关系。与其他牙颌面异常一样，正常的生长过程会引起这些参数的变化。本研究的目的是评估患有安氏II类2分类错牙合畸形的生长发育期患者的骨骼和牙齿变化。该研究还着重分析和比较三组不同年龄、诊断为II类2分类错牙合畸形的年轻患者的几个参数，以确定该异常在患者生长期间是恶化还是改善。使用cephX分析了总共25张头颅侧位X线片。患者被分为三组（第1组：6 - 8岁，第2组：9 - 14岁，第3组：15 - 18岁）。我们使用了Björk - Jarabak和Tweed分析中描述的头影测量参数，以及上下中切牙与骨骼标志点的关系。本研究中使用的统计方法是方差分析（ANOVA）和非配对学生t检验（p<0.05）。我们得出结论，在生理生长过程中，安氏II类2分类错牙合畸形具有以下头影测量特征：上颌中切牙明显舌倾，切牙间角非常钝，下颌角在生长期末低于正常值，下颌前面部高度明显降低，下颌体长在生长早期短于正常，并且在生长过程中骨骼型呈低角型的趋势保持稳定。
