摘要
目的:研究生长高峰前期及后期,不同矢状骨面型,上颌骨生长方向的变化。方法:根据颈椎发育分期,选取处于CVS1、CVS2的96例及处于CVS5、CVS6的83例初诊患者为研究对象,其中生长高峰前期,骨性Ⅰ类32例、Ⅱ类33例、Ⅲ类31例;生长高峰后期,骨性Ⅰ类29例、Ⅱ类29例、Ⅲ类25例,均有治疗前的X线头颅侧位片,通过测量∠SN-C轴(θ),来研究矢状骨面型的上颌骨生长方向及生长因素对其的影响。结果:①生长高峰前期组,骨性Ⅱ类C轴角(θ)均值为47.14°,Ⅲ类为47.37°,Ⅰ类为48.42°,其中Ⅱ类C轴角与Ⅰ类之间差异有统计学意义(PⅠⅡ<0.05)。②生长高峰后期组,骨性Ⅲ类C轴角均值49.95°,骨性Ⅰ类为48.88°,骨性Ⅱ类为48.25°,骨性Ⅱ、Ⅲ类之间C轴角有统计学差异(PⅡⅢ<0.01)。③在生长发育过程中,骨性Ⅲ类C轴角平均增幅为2.59°(P<0.005),骨性Ⅱ类平均增幅为1.11°,骨性Ⅰ类为0.46°,骨性Ⅲ类C轴角明显增大,生长高峰前后期,C轴角差异有高度统计学意义。结论:①在生长过程中,骨性Ⅱ、Ⅲ类上颌骨垂直向生长明显,尤其是Ⅲ类,因此应在生长高峰期开始注意垂直距离的控制。②骨性Ⅱ类在高峰前期主要是矢状向的生长,因此针对上颌骨发育过度的矫形治疗应在高峰前期开始治疗。③在生长发育过程中骨性Ⅰ类上颌骨生长方向基本不变,垂直向和矢状向生长是协调的。
Objective：To figure out the differences of maxillary growth vector with various sagittal skeletal malocclusions between pre-and post-growth spurts.Method：one hundred and seventy nine cases with different sagittal skeletal malocclusions were selected and divided into six groups according to saggital skeletal patterns and cervical vertebral stages：CVS1,2-classⅠ（n=32）,CVS1,2-classⅡ（n=33）,CVS1,2-classⅢ（n=31）;CVS5,6-classⅠ（n=29）,CVS5,6-classⅡ（n=29）,CVS5,6-classⅢ（n=25）,which were all taken lateral cephalograms.The ∠SN-C axis（θ）was measured and observation and statics analysis were done to understand the differences of maxillary growth vector between pre-and post-growth spurts and differences among saggital skeletal patterns.Result：The vector of the growth axis,named by the angle SN-C axis,of skeletal class Ⅲ,increases from 47.37 degrees to 49.95 degrees with a mean 2.59-degrees increment.Of classⅡ,it increases from a mean of 47.14 degrees to 48.25 degrees with a mean 1.11-degrees increment,while of class Ⅰ,it increases from 48.42 degrees to 48.88 degrees with only 0.46 degrees increment.Conclusion：During circumpubertal period,different saggital skeletal patterns owns its unique increments of maxillary growth vector.In classⅢ,maxilla statically significantly growths vertically and the vertical increments of C-axis angle in classⅡ is much more than that in classⅠ.Also,C-axis angle of class Ⅰis relatively stable during growth period.
出处
《临床口腔医学杂志》
2011年第1期14-16,共3页
Journal of Clinical Stomatology
关键词
矢状骨面型
C轴
上颌骨生长方向
颈椎成熟度分级
sagittal skeletal patterns
C axis
maxillary growth vector
cervical vertebral maturation stage（CVMS）
