正颌手术患者不同体位下静态露齿的比较及影响因素分析

Comparison of static teeth exposure in different postures and its influencing factors of orthognathic surgery patients

目的 探究正颌手术患者不同体位下静态露齿的差异及影响因素。方法 收集正颌术前或术后患者148例,分别于直立位与仰卧位时拍摄照片,测量静态露齿值,比较不同体位的差值是否具有统计学意义。将患者根据性别、口内是否有正畸托槽、测量时间(术前、术后)、术中上颌骨移动方向(前徙、后退)进行分类,比较静态露齿差值的差异。将露齿差值与年龄进行Pearson相关分析,探究其相关性。结果 2种体位下静态露齿的差值为0.99 mm±0.95 mm,二者的差异有统计学意义(P=0.000)。不同性别的静态露齿差值间的差异有统计学意义(P<0.05);是否有正畸托槽、术前术后测量时间、不同上颌骨移动方向的静态露齿差值间的差异无统计学意义(P>0.05)。露齿差值与年龄无明显相关性(r=-0.087,P=0.291)。结论 仰卧位相较于直立位,静态露齿会增加约0.99 mm;男性不同体位下静态露齿差值大于女性,是否有正畸托槽、是否接受过上颌骨手术、上颌骨移动方向、年龄对不同体位下静态露齿的差值无影响。

Objective This study aimed to explore the differences and influencing factors of static teeth exposure in different postures of orthognathic surgery patients.Methods A total of 148 patients were collected before or after orthognathic surgery.Photographs were taken in the upright and supine positions,and the static teeth exposure values were measured to compare whether the difference among different positions was statistically significant.The patients were classified in accordance with gender,presence or absence of orthodontic brackets,measurement time(preoperative or postoperative),and maxillary movement direction(forward or backward),and the difference of static teeth exposure was compared.The correlation between the difference of static teeth exposure and age was analyzed.Results The difference of static teeth exposure between the two positions was 0.99 mm±0.95 mm,which was statistically significant(P=0.000).A statistical difference in the difference of static exposure was observed between female and male(P<0.05).No statistical difference in the difference of static exposure was observed among orthodontic brackets,preoperative or postoperative time points,and maxillary movement direction.In addition,no significant correlation was found between the difference of static teeth exposure and age(r=-0.087,P=0.291).Conclusion Compared with the upright position,the static exposure of teeth increased by approximately 0.99 mm in the supine position.The difference of static exposure under different postures was greater in males than in females.Furthermore,orthodontic bracket,maxillary surgery,maxillary movement direction,and age had no effect on the difference of static teeth exposure in different postures.