关键词: 垂直骨面型, 临床冠中心高度, 托槽粘结, vertical facial skeletal pattern, center height of clinical crowns, bracket placement

Abstract: Objective To compare the center heights of clinical crowns of the adults with different vertical facial skeletal patterns and obtain the average value of the center heights of clinical crowns. Methods 30 high angle, 30 average angle and 30 low angle adults were selected as samples according to the inclusion criteria. The center heights of clinical crowns of the same teeth in three groups were measured and the differences between them were statistically analyzed. Results The center heights of clinical crowns in high angle group were higher than those in the average angle group, but there was no significant difference(P>0.05). The center heights of clinical crowns in high angle group and average group were all higher than those in low angle group and there was a significant statistically difference between them(P<0.05). Conclusion The straight-wire brackets should be placed in the center of clinical crowns. The bonding heights of the high and average angle patients should be greater than those of the low angle patients. The doctor should determine the bonding height of brackets according to the vertical facial skeletal pattern of each patient.