【 文献重点摘要 】
 

No previous study has objectively evaluated the effect of different forehead injection patterns on the eyebrow height and forehead lines. The patients were divided into three groups. Botulinum toxin was injected into both the lateral and medial eyebrow depressors in all groups. The frontalis was injected using either a V-pattern (group 1), a middle horizontal pattern (group 2), or a high horizontal pattern (group 3). Objective eyebrow measurements were performed using standardized preinjection and postinjection photographs. Validated photonumeric scales were used to assess the forehead lines. Fifteen patients (30 eyebrows) were included in each group. In all of the groups, 2 weeks after injection, the brow was lower at all the measured positions, with the exception of the lateral brow edge, which was higher in the three injection patterns. No difference was found when comparing group 1 to groups 2 and 3. The middle forehead injection pattern lowered the eyebrow more than the upper forehead injection pattern. The three techniques improved the forehead lines at rest and with contraction. The forehead lines with contraction were more improved in group 1 compared with both groups 2 and 3. Each forehead injection pattern yielded different results on forehead lines and eyebrow position. Upper forehead injections were less effective on forehead lines but prevented eyebrow ptosis.

以前没有研究客观地评估不同额部注射方式对眉高和额线的影响。将患者分为三组。各组均于降眉外侧和内侧同时注射肉毒杆菌毒素。额肌注射采用V型(第1组)、中等水平型(第2组)或高水平型(第3组)。目的使用标准化的注射前和注射后照片进行眉毛测量。使用经过验证的光电数字标尺来评估额部线条。每组15例(30条眉毛)。在注射2周后，除侧眉边缘在三种注射模式中均较高外，其余所有测量位置的眉毛都较低。第1组与第2、3组比较，差异无显著性。额部中部注射方式比额部上部注射方式更能降低眉毛。这三种技术改善了静息和收缩时的额部线条。与2、3组相比，第1组额部皱纹改善更明显。不同额部注射方式对额部线条和眉毛位置的改善效果不同，但不同的额部注射方式对额部线条和眉毛位置的改善效果不同。前额上部注射对额部线条的效果较差，但可以预防眉毛下垂。