Bratisl Lek Listy. 2022;123(3):185-190. doi: 10.4149/BLL_2022_030.
The aims of our research were as follows: 1) Description of changes in the position of the upper and lower lips, as a result of the change in the position of upper and lower incisors after orthodontic treatment of malocclusion of Class II, division 2 type. 2) Determination of correlation between changes in the position of lips and incisors in the profile of the face after orthodontic treatment of malocclusion of Class II, division 2 type.MATERIALS AND METHODS: Our study analyses the documentation of 115 patients with malocclusion of Class II, division 2 type treated with a fixed orthodontic appliance in the upper and lower dental arches at the Orthodontic Department of the Clinic of Dentistry in Olomouc from January 1, 1996 to December 31, 2017. There were 78 women and 37 men aged 11 to 36 years included in the database. Cephalometric images of patients from the group taken before and after the treatment were used for the purpose of cephalometric analysis according to Kamínek (1) and Burstone's analysis (2) of soft tissues. Subsequently, all output data were processed statistically.
While the protrusion of the incisors after treatment of malocclusion of Class II, division 2 type was 3 mm, the facial profile showed statistically significant changes in soft tissues in the ventral direction by 1 mm on average just in the area of the upper and lower lips, which means a shift corresponding to one third of teeth movement.
A statistically significant change in the position of incisors, soft tissues as well as correlation between changes in hard and soft tissues in the face profile after orthodontic treatment of malocclusion of Class II, division 2 type were demonstrated. The more the incisors were inclined, the more the lips moved forward, and the patient's profile turned out to be aesthetically improved (Tab. 2, Fig. 3, Ref. 39).
我们的研究目的如下：1）描述 II 类 2 分类错牙合正畸治疗后上下切牙位置变化引起的上下唇位置变化。2）确定 II 类 2 分类错牙合正畸治疗后面部轮廓上下唇位置与切牙位置的相关性。材料与方法：我们的研究分析了 1996 年 1 月 1 日至 2017 年 12 月 31 日期间在奥洛穆茨牙科诊所正畸科接受上下牙弓固定正畸矫治的 115 例 II 类 2 分类错牙合患者的文献。数据库中包括 78 名女性和 37 名年龄在 11 至 36 岁的男性。根据 Kamínek（1）和 Burstone 的软组织分析（2）对患者组的头颅侧位片进行了头颅测量分析。随后，对所有输出数据进行了统计学处理。结果：II 类 2 分类错牙合治疗后切牙突出 3mm，面部软组织在正下方平均有统计学意义的 1mm 变化，这意味着上下唇位置相应移动了三分之一牙齿的移动距离。结论：证明了 II 类 2 分类错牙合正畸治疗后切牙位置、软组织以及硬组织和面部轮廓软组织变化之间的相关性发生了统计学显著变化。切牙倾斜程度越大，嘴唇向前移动越多，患者的侧貌得到改善（表 2，图 3，参考文献 39）。
